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1970-74 Challenger/Cudawithout Factory Air
Evaporator Kit571074-EDZ
901074-EDZ REV F 08/21/18, PG 1 OF 24
an ISO 9001:2015 Registered Company
18865 Goll St. San Antonio, TX 78266 Phone: 800-862-6658
Sales: [email protected] Support: [email protected]
www.vintageair.com
2901074-EDZ REV F 08/21/18, PG 2 OF 24
1. Cover 2. Table of Contents 3. Packing List/Parts Disclaimer 4. Information Page 5. Wiring Notice 6. Engine Compartment Figure 1 7. Condenser, Compressor Bracket & Passenger Compartment Figure 2 8. Passenger Compartment (Cont.), Defrost Duct and Fresh Air Cap Installation Figures 3, 4 & 5 9. Evaporator Installation Figure 610. Evaporator Installation (Cont.) Figures 7, 7a & 7b11. Firewall Cover Installation Figure 812. Drain Hose Installation Figure 913. A/C & Heater Hose Installation14. A/C Hose Routing Figure 1015. Heater Control Valve Installation Figure 1116. Control Panel Wiring & Duct Hose Routing Figure 1217. Under Dash Louver Bezel Installation Figures 13 & 1418. Evaporator Hardline & Bracket Installation Figure 1519. Wiring Diagram20. Gen IV Wiring Connection Instructions21. Operation of Controls22. Troubleshooting Information23. Troubleshooting Information (Cont.)24. Evaporator Kit Packing List
Table of Contents
3901074-EDZ REV F 08/21/18, PG 3 OF 24
** Before beginning installation, open all packages and check contents of shipment. Please report any shortages directly to Vintage Air within 15 days. After 15 days, Vintage Air will not be responsible for missing or damaged items.
Gen IV 4-VentEvap. Sub Case
744004-VUE
11
744004-VUE781074-PMN
Gen IV 4-Vent Evaporator Sub Case Accessory Kit 70-74 Challenger/Cuda without A/C
1
2
Accessory Kit781074-PMN
NOTE: Images may not depict actual parts and quantities. Refer to packing list for actual parts and quantities.
OFF
DASH
HOT
FLR
HI
DEF
COLD
A/C
HOTCOLD
Packing ListEvaporator Kit (571074-EDZ)
No. Qty. Part No. Description
1.2.
4901074-EDZ REV F 08/21/18, PG 4 OF 24
Important Notice—Please ReadFor Maximum System Performance, Vintage Air Recommends the Following:
New Vintage Air-supplied Sanden Compressor: No additional oil needed (Compressor is shipped with proper oil charge).All Other Compressors: Consult manufacturer (Some compressors are shipped dry and will need oil added).
NOTE: Vintage Air systems are designed to operate with R134a refrigerant only. Use of any other refrigerant could damage your A/C system and/or vehicle, and possibly cause a fire, in addition to potentially voiding the warranties of the A/C system and its components.
Refrigerant Capacities:Vintage Air System: 1.8 lbs. (1 lb., 12 oz.) of R134a, charged by weight with a quality charging station or scale. NOTE: Use of the proper type and amount of refrigerant is critical to system operation and performance.Other Systems: Consult manufacturer’s guidelines.
Lubricant Capacities:
Safety Switches
Service Info:Protect Your Investment: Prior to assembly, it is critical that the compressor, evaporator, A/C hoses and fittings, hardlines, condenser and receiver/drier remained capped. Removing caps prior to assembly will allow moisture, insects and debris into the components, possibly leading to reduced performance and/or premature failure of your A/C system. This is especially important with the receiver/drier. Additionally, when caps are removed for assembly, BE CAREFUL! Some components are shipped under pressure with dry nitrogen.Evacuate the System for 35-45 Minutes: Ensure that system components (Drier, compressor, evaporator and condenser) are at a temperature of at least 85° F. On a cool day, the components can be heated with a heat gun or by running the engine with the heater on before evacuating. Leak check and charge to specifications.
Your Vintage Air system is equipped with a binary pressure safety switch. A binary switch disengages the compressor clutch in cases of extreme low pressure conditions (Refrigerant Loss) or excessively high head pressure (406 PSI) to prevent compressor damage or hose rupture. A trinary switch combines Hi/Lo pressure protection with an electric fan operation signal at 254 PSI, and should be substituted for use with electric fans. Compressor safety switches are extremely important since an A/C system relies on refrigerant to circulate lubricant.
Bolts Passing Through Cowl and/or Firewall:To ensure a watertight seal between the passenger compartment and the vehicle exterior, for all bolts passing through the cowl and/or firewall, Vintage Air recommends coating the threads with silicone prior to installation.
Heater Hose (Not Included With This Kit):Heater hose may be purchased from Vintage Air (Part# 31800-VUD) or your local parts retailer. Routing and required length will vary based on installer preference.
5901074-EDZ REV F 08/21/18, PG 5 OF 24
Important Wiring Notice—Please Read
Some Vehicles May Have Had Some or All of Their Radio Interference Capacitors Removed. There Should Be a Capacitor Found At Each of the Following Locations:
1. On the positive terminal of the ignition coil.2. If there is a generator, on the armature terminal of the generator.3. If there is a generator, on the battery terminal of the voltage regulator.
Most alternators have a capacitor installed internally to eliminate what is called “whining” as the engine is revved. If whining is heard in the radio, or just to be extra cautious, a radio interference capacitor can be added to the battery terminal of the alternator.
It is also important that the battery lead is in good shape and that the ground leads are not compromised. There should be a heavy ground from the battery to the engine block, and additional grounds to the body and chassis.
If these precautions are not observed, it is possible for voltage spikes to be present on the battery leads. These spikes come from ignition systems, charging systems, and from switching some of the vehicle’s other systems on and off. Modern computer-operated equipment can be sensitive to voltage spikes on the power leads, which can cause unexpected resets, strange behavior, and/or permanent damage.
Vintage Air strives to harden our products against these types of electrical noise, but there is a point where a vehicle’s electrical system can be degraded so much that nothing can help.
Radio interference capacitors should be available at most auto and truck parts suppliers. They typically are cylindrical in shape, a little over an inch long, a little over a half inch in diameter, and they have a single lead coming from one end of the cylinder with a terminal on the end of the wire, as well as a mounting clip which is screwed into a good ground on the vehicle. The specific value of the capacitance is not too significant in comparison to ignition capacitors that are matched with the coil to reduce pitting of the points.
Care must be taken, when installing the compressor lead, not to short it to ground. The compressor lead must not be connected to a condenser fan or to any other auxiliary device. Shorting to ground or connecting to a condenser fan or any other auxiliary device may damage wiring, the compressor relay, and/or cause a malfunction.
When installing ground leads on Gen IV systems, the blower control ground and ECU ground must be connected directly to the negative battery post.
For proper system operation, the heater control valve must be connected to the ECU.
•
•
•
6901074-EDZ REV F 08/21/18, PG 6 OF 24
Blower Assembly
Heater Hose(From Intake)
Heater Hose(From Water Pump)
Figure 1
Hood LatchAssembly
Engine Compartment
Disconnect battery.Drain radiator.Remove hood latch assembly.Remove OEM heater hoses from water pump and intake.Remove OEM heater hoses from heater lines coming through firewall.Remove OEM blower assembly.
1.2.3.4.5.6.
NOTE: Before starting the air conditioner installation, check all components (radio, lights, wipers, etc.) for proper operation and study the instructions, illustrations and diagrams.
7901074-EDZ REV F 08/21/18, PG 7 OF 24
To ease installation, loosen the top (4) dash mounting bolts located in the defrost ducts alongthe bottom side of the windshield, as well as the (2) side dash mounting bolts.Pull dash away from windshield to remove (4) OEM defrost duct mounting screws (See Figure3, below). Remove OEM defrost duct assembly (See Figure 2, below).Remove the passenger side fresh air lever and cable (discard).Disconnect the driver side fresh air lever at dash and relocate approximately as shown underdash using existing holes.
1.
2.
3.4.5.
Figure 2
Condenser Assembly & Installation
Compressor & Brackets
Passenger Compartment
Refer to separate instructions included with the condenser kit to install the condenser.1.
1. Refer to separate instructions included with the bracket kit to install the compressorbracket.
COOL
A/CHEAT
WARM
FANHIGH
COOL
TEMP
LOW
DEF
MAX A/C
OEM Defrost Duct Assembly
(4) OEM Mounting
Screws
Pass. Side Fresh Air Lever
& Cable(Remove And Discard)
New Location ForDriver Side Fresh Air Lever
& Cable(Use Existing OEM Holes
Under Dash)
Driver Side Fresh Air Lever
(Disconnect& Relocate)
8901074-EDZ REV F 08/21/18, PG 8 OF 24
Using the OEM mounting screw, install the new defrost ducts as shown in Figure 4, below.
Defrost Duct Installation
Passenger Compartment (Cont.)Remove the OEM heater assembly from under dash as shown in Figure 3, below.Remove the OEM control panel assembly from dash as shown in Figure 3, below.Refer to control panel conversion kit instructions for installation of controls.
1.2.3.
1.
OEM HeaterAssembly
Figure 4
COOL
A/CHEAT
WARM
FANHIGH
COOL
TEMP
LOW
DEF
MAX A/C Figure 3
620073-PMEFresh Air Cap (2) 18247-VUB
#10 x 1/2” Sheet Metal ScrewsFigure 5
Using (2) #10 x 1/2” sheet metal screws install the fresh air cap as shown in Figure 5, below.
1.
Defrost Duct
OEMScrew
OEMScrew
Fresh Air Cap Installation
OEM ControlPanel Assembly
9901074-EDZ REV F 08/21/18, PG 9 OF 24
Evaporator Installation
(2) 1/4-20 x 1/2”Hex Bolts
Figure 6
1.
2.
3.
4.
5.
6.
7.
Mark front evaporator mounting bracket hole locations on inner cowl (See Figure 7a, Page 10). Onceholes are marked in the correct location, drill 1/8" holes in inner cowl for front evaporator bracketmounting location.Mark and drill (2) 9/32" holes for driver/passenger side evaporator rear mounting bracket in firewall(See Figure 7b, Page 10).On a workbench, install evaporator rear bracket and hardlines with properly lubricated O-rings (SeeFigure 10a, Page 14 and Figure 15, Page 18).Install front mounting bracket on evaporator using (2) 1/4-20 x 1/2" hex bolts and tighten as shown inFigure 6, below.Lift evaporator unit up under the dashboard (See Figure 7, Page 10). Secure loosely to the firewall fromthe engine compartment side using (2) 1/4-20 nuts and washers (See Figure 7, Page 10).Using (2) #14 x 3/4" sheet metal screws, secure the front evaporator mounting bracket to the innercowl (See Figure 7, Page 10).Verify that evaporator unit is level and square to the dash. Then tighten all mounting bolts.NOTE: Tighten the bolt on firewall first. Then tighten the front mounting bracket screws.
10901074-EDZ REV F 08/21/18, PG 10 OF 24
(2) #14 x 3/4”Sheet Metal
Screws
Mark & Drill 1/8”Holes Mark & Drill 9/32”
Holes
(2) 1/4-20 Nutsw/ Washers
Firewall
Inner Cowl
View Through Dash
2”
1 7/8" 7”
Figure 7a
Figure 7
Passenger SideFirewall
Figure 7b
8 3/8"
4”4"
8 1/4"
11901074-EDZ REV F 08/21/18, PG 11 OF 24
Firewall Cover Installation Apply 1/4” bead of silicone around the back side of the firewall cover as shown in Figure 8, below.Pass lines through firewall cover and secure with (3) 7/16" panel retainers (See Figure 8, below).Install (2) 33142-VUI rubber plugs in OEM heater holes as shown in Figure 8, below.
1.2.3.
Silicone
Back Sideof Firewall
Cover
(3) 189002-MSR7/16" Panel
Retainers
OEMHeater Holes
(2) 33142-VUIRubber Plugs
Figure 8
12901074-EDZ REV F 08/21/18, PG 12 OF 24
In line with the drain, lightly make a mark on the firewall. Measure one inch down and drill a 5/8” holethrough the firewall (See Figure 9, below).Install drain hose to bottom of evaporator unit and route through firewall (See Figure 9, below).
1.
2.
Drain Hose Installation
1”
DrainDrainHose
Figure 9
13901074-EDZ REV F 08/21/18, PG 13 OF 24
Locate the #10 compressor A/C hose. Lubricate (2) #10 O-rings (See Figure 10a, Page 14) and connect the 90° fitting to the #10 suction port on the compressor, and then route the straight fitting to the #10 evaporator hardline coming through the firewall (See Figure 10, Page 14). Tighten each fitting connection as shown in Figure 10a, Page 14. NOTE: The #10 A/C hose 90° fitting at the compressor must be installed below the #8 135° hose fitting. This needs to be done so the air filter box is not pushed out of position by the #10 A/C hose. In some cases the fuel filter may block the routing of the #10 hose, if so the fuel filter will have to be relocated to clear the routing of the #10 hose. Wrap the #10 fitting connections at the firewall with press tape (See Figure 10, Page 14).Locate the #8 compressor A/C hose. Lubricate (2) #8 O-rings (See Figure 10a, Page 14) and connect the 135° fitting to the #8 discharge port on the compressor, and then route the 45° fitting to the #8 condenser hardline on the fender well (See Figure 10, Page 14). Tighten each fitting connection as shown in Figure 10a, Page 14.Locate the #6 evaporator/core hardline. Lubricate (2) #6 O-rings (See Figure 10a, Page 14) and connect the hardline to the #6 drier/core hardline on the fender well from the drier. Attach the other end of the hardline with lubricated O-ring to the #6 evaporator hardline coming through the firewall (See Figure 10, Page 14). Tighten each fitting connection as shown in Figure 10a, Page 14. Use a #2 Adel clamp to secure the #6 evaporator/core hardline to the inner fender well as shown in Figure 10, Page 14. Secure the Adel clamp to the inner fender using a #10 x 1/2” sheet metal screw.
1.
2.
3.
A/C Hose Installation
Refer to separate instructuons included with modified hose kit.
Modified A/C Hose1.
Route a piece of heater hose from the water pump to the heater line coming through the firewall as shown in Figure 10, Page 14, and Figure 11, Page 15. Secure using hose clamps. Route a piece of heater hose from the intake to the heater line coming through the firewall as shown in Figure 10, Page 14, and Figure 11, Page 15. NOTE: Install heater control valve in line with intake manifold (pressure side) heater hose, and secure using hose clamps as shown in Figure 11, Page 15. Also note proper flow direction.
Heater Hose & Heater Control Valve Installation
1.
2.
14901074-EDZ REV F 08/21/18, PG 14 OF 24
FIG
UR
E 8
Fig
ure
10
a
Fig
ure
10
Hos
e R
outi
ng
Pres
sTa
pe
#6
O-r
ing
Hol
d W
ithTh
is W
renc
h
O-r
ing,
Slid
e O
ver
Mal
e In
sert
to
Sw
aged
Lip
Sup
plie
d O
ilfo
r O
-rin
gs
NO
TE:
For
a p
rop
er s
eal o
f fi
ttin
gs,
inst
all s
up
plie
d O
-rin
gs
as s
how
nan
d lu
bri
cate
wit
h s
up
plie
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il.
Lubr
icat
eO
-rin
g
Twis
t W
ithTh
isW
renc
h
#8
O-r
ing
#10
O-r
ing
O-r
ing
Mal
eIn
sert
Fem
ale
Nut
Pres
sTa
peEx
pans
ion
Valv
e
Fire
wal
lCov
er
#2
& #
10 A
del C
lam
p#
10 x
1/2
"She
et M
etal
Scr
ew
#2
& #
4 Ade
l Cla
mp
#10
x 1
/2"
She
et M
etal
Scr
ew
#2
& #
4 Ade
l Cla
mp
#10
x 1
/2"
She
et M
etal
Scr
ew
Hea
ter
Con
trol
Valv
e
#6
Evap
orat
or/C
ore
Har
dlin
e(1
0100
9-EF
L)
#10
A/C
Suc
tion
Hos
e(C
ompr
esso
r/Ev
apor
ator
)
#8
Con
dens
erH
ardl
ine
#8
A/C
Dis
char
ge H
ose
(Com
pres
sor/
Con
dens
er H
ardl
ine)
#6
Drier
/Cor
eH
ardl
ine
ECU
Mod
ule
#10
O-r
ing
#8
O-r
ing
#8
O-r
ing
Evap
orat
orSub
Cas
e
#10
Suc
tion
Lin
e (I
nsul
ated
)
15901074-EDZ REV F 08/21/18, PG 15 OF 24
Heater Control Valve Installation
Install duct hoses as shown in Figure 12, Page 16.Plug the control panel harness into the ECU module on the sub case as shown (See Figure 12, Page 16).Route the control panel harness under the center dash assembly and connect the control harness to the PCboard assembly on the back side of the control panel as shown in Figure 12, Page 16.Plug the wiring harness into the ECU module on the sub case as shown (Wire according to wiring diagram onPage 19).Reinstall control panel. Refer to control panel conversion kit instructions.
1.2.3.
4.
5.
Duct Hose Routing,Control Panel Harness
& Under Dash Panel Installation
ECUModule
#10 SuctionLine (Insulated)
Firewall Cover
NOTE: Flow direction followsmolded arrow on valve.
PressTape
ExpansionValve O-ring
#6 Liquid Line
#10 Suction Hose
Heater Hose
From Intake
To Water Pump From Htr Cntrl VlvFigure 11
16901074-EDZ REV F 08/21/18, PG 16 OF 24
Control Panel & Duct Hose Routing
Back Side of PC Board
Assembly
Control PanelHarness
From ECU 232007-VUR
PlugFromWiring
Harness232600-VUA
Center LouverDriver Side
Center Louver
Passenger Side
Figure 12
S B
Y
Driver Side Def. Duct2” X 18”
Driver Side Louver
2 ½” X 36"
Center LouverDriver Side2 ½” X 20”
Center LouverPass. Side2 ½” X 26”
Pass. Side Def. Duct2” X 16”
Pass. Side Louver
2 ½” X 48”
PlugFrom
ControlWirng
Harness232007-VUR
Driver SideLouver
Passenger Side
Louver
17901074-EDZ REV F 08/21/18, PG 17 OF 24
Using (3) #8 x 1/2” pan head screws, install the under dash louver bezel, and align with OEM holes inthe dash as shown in Figure 13, below.Install louvers as shown in Figure 14, below.Reinstall all previously removed items (Battery box & battery).Fill radiator with at least a 50/50 mixture of approved antifreeze and distilled water. It is the owner'sresponsibility to keep the freeze protection at the proper level for the climate in which the vehicle isoperated. Failure to follow antifreeze recommendations will cause heater core to corrode prematurelyand possibly burst in A/C mode and/or freezing weather, voiding your warranty.Double check all fittings, brackets and belts for tightness.Vintage Air recommends that all A/C systems be serviced by a certified automotive air conditioningtechnician.Evacuate the system for a minimum of 45 minutes prior to charging. Leak check prior to servicing.Charge the system to the capacities stated on the information page (Page 4) of this instruction manual.
1.
2.3.4.
5.6.
7.8.
Under DashLouver Bezel Installation
(3) 18235-VUB#8 x 1/2”
Pan Head Screws
(3) 492365-LUA Louvers
492073-VMEUnder DashLouver Bezel
Figure 13
Figure 14
18901074-EDZ REV F 08/21/18, PG 18 OF 24
#6
Liqu
id L
ine
(091
50-P
CL)
Evap
orat
or
Har
dlin
e In
stal
lati
on
Hea
ter
Line
(Eva
p to
Int
ake)
0915
3-PC
H
NO
TE:
Aft
er in
stal
ling
#1
0 s
uct
ion
lin
e,w
rap
all
exp
osed
met
al
(fitt
ing
s &
tu
be)
wit
h s
up
plie
d
pre
ss t
ape.
Pre
ss T
ape
#6
O-r
ing
(338
57-V
UF)
FIG
UR
E 8
Hol
d W
ithTh
is W
renc
h
Lubr
icat
e O
-rin
g(S
ee F
igur
e 10
a,Pa
ge 1
4)
1/4-
20 x
1/2
”Bol
t(L
ocat
ed o
n Sub
Cas
e)
Twis
t W
ithTh
isW
renc
h
Fig
ure
15
#10
O-r
ing
(335
89-V
UF)
1891
25-M
UR
1/4”
Pus
h N
utBol
t Re
tain
er
#10
O-r
ing
(338
59-V
UF)
Hea
ter
Line
(Eva
p to
Wat
er P
ump)
0915
2-PC
H
ECU
Mod
ule
#10
Suc
tion
Lin
e (0
9151
-PCS)
Drive
r Sid
e(E
vap.
Brk
t)64
3531
-PCB
1/4-
20 x
1/2
”Bol
t(L
ocat
ed o
n Sub
Cas
e)
1828
9-VU
B1/
4-20
x 1
/2"
Coa
rse
Bol
tw
/ 18
125-
VU
BFl
at W
ashe
r
Bra
cket
Pass
. Sid
e(E
vap.
Brk
t)64
3069
-PCB
1804
0-VU
B3/
4” N
ylon
Spa
cer
19901074-EDZ REV F 08/21/18, PG 19 OF 24
WHT/GRN
WHT/YELWHT/RED
RED
WHTBACKLIGHT NEG
FAN WIPER
MODE WIPER
TEMP WIPER
5V-SW
GND
BACKLIGHT POS
AC ANNUNCIATOR
PRE-WIRED
GEN IV WIRING DIAGRAMREV E, 10/6/2017
GEN IV ECU
PROGRAM
Wiring Diagram
TEMP
MODE
FAN
A/C(IF USED)
232007-VUR
232002-VUA
** CIRCUITBREAKER30 AMP
*** WIDE OPENTHROTTLESWITCH
(OPTIONAL)
* DASH LAMP(IF USED)
Dash Lamp Is Used Only With Type 232007-VUR Harness.Warning: Always Mount Circuit Breaker As Close to the Battery As Possible. (NOTE: Wire BetweenBattery and Circuit Breaker Is Unprotected and Should Be Carefully Routed to Avoid a ShortCircuit).Wide Open Throttle Switch Contacts Close Only at Full Throttle, Which Disables A/C Compressor.
JF8
BLK
ORA
TAN
VIEWED FROM WIRE SIDE
* **
***
HEATERCONTROL VALVE
20901074-EDZ REV F 08/21/18, PG 20 OF 24
RED
CIRCUIT BREAKER30 AMP
+
+
-
BLACK
REDWHITE
RED
CHASSIS GROUND
A/CCOMPRESSOR
RELAY
Ignition Switch:
Dash Light:
NOTE: MOUNT RELAYIN DESIRED LOCATION
UNDER DASH
GREEN
FIREWALL
BLUE
BLUE
RED &
WHITE
VIOLET
(IGNITION HOTTERMINAL)
IGNITION SWITCH
DASH BACK LIGHT+0-12vTAN
GRAY
BLUE
WHITE
WHITE
REDRED
WHITE
COMPRESSOR
BATTERY
NOTE: CONNECT WHITEWIRES DIRECTLY TO
(-) BATTERY TERMINAL
BATRUN
12V
RED GREEN
RED
RED
BLUE
LATCH
BLACK
BINARYSAFETYSWITCH
YELLOW
ORANGE
WIRING HARNESS
Violet 12V Ign Switch Source (Key On Accessory) Position Must Be Switched.
Tan Wire Used Only With Vintage Air Supplied Control Panel With LED Back Light.
Binary: Connect As Shown (Typical Compressor Wiring). Be Sure Compressor Body Is Grounded.
Trinary Switch: Connect According To Trinary Switch Wiring Diagram.
Install With Servo Motor Facing Down, As Shown. Note Flow Direction Arrow Molded Into Valve Body, And Install Accordingly.
White Must Run To (-) Battery. Red May Run To (+) Battery Or Starter. Mount Circuit Breaker As Close to Battery As Possible.
Heater Control Valve:
Binary/Trinary & Compressor:
Circuit Breaker/Battery:
CONTROL WIRING HARNESS
NOTE: YELLOW & ORANGE
COMING FROM HARNESS ARE NOT
USED.
WIRING HARNESS
GRAY WIRE IS USED FOR PROGRAMING CONTROLS
IF APPLICABLE
WIRING HARNESS
Gen IV Wiring Connection Instruction
HEATERCONTROL VALVE
WARNING: ALWAYS MOUNT CIRCUIT BREAKER
AS CLOSE TO THE BATTERY AS POSSIBLE. (NOTE: WIRE BETWEEN BATTERY AND CIRCUIT BREAKER IS UNPROTECTED
AND SHOULD BE CAREFULLY ROUTED TO AVOID A SHORT CIRCUIT).
NOTE: HEATER CONTROL VALVE CONNECTION AND CHASSIS GROUND MAY BE LOCATED ON EITHER SIDE OF THE FIREWALL. ENSURECONNECTOR IS LATCHED
FIRMLY.
21901074-EDZ REV F 08/21/18, PG 21 OF 24
Operation of Controls
Adjust to desiredspeed.
Blower SpeedAdjust to desired
speed.
Adjust to desiredmode position (DASH position recommended).
Adjust to desiredspeed.
Adjust to DEFROST position for maximum defrost, or between FLOOR and DEFROST positions for a bi-level
blend (Compressor is automatically engaged).
Adjust to desired temperature.
For A/C operation, adjust tocoldest position to engage
compressor (Adjust between HOT and COLD to reachdesired temperature).
A/C Operation
Heat Operation
Defrost/De-fog Operation
On Gen IV systems with three lever/knob controls, the temperature control toggles between heat and A/C operations. To activate A/C, move the temperature lever/knob all the way to cold and then back it off to the desired vent temperature. For heat operation, move the temperature lever/knob all the way to hot and then adjust to the desired vent temperature. The blower will momentarily change speed, each time you toggle between operations, to indicate the change. NOTE: For proper control panel function, refer to control panel instructions for calibration procedure.
Blower Speed
Blower Speed
This lever/knob controlsblower speed, from
OFF to HI.
This lever/knob controls the mode positions,from DASH to FLOORto DEFROST, with a blend in between.
This lever/knob controlsthe temperature,
from HOT to COLD.
Blower Speed
Mode Control
Temperature Control
TemperatureControl
A/C Light
ModeControl
Temperature Control
Temperature Control
Temperature Control
Mode Control
Mode Control
Mode Control
For maximum heating, adjust to hottest position (Adjust between HOT and COLD to reach desired temperature).Adjust to desired
mode position(FLOOR position recommended).
OFF HI
DASH DEF
HOT COLDA C
FLR
Blower Speed
OFF HI
DASH DEF
HOT COLDA C
FLR
OFF HI
DASH DEF
HOT COLDA C
FLR
OFF HI
DASH DEF
HOT COLDA C
FLR
NOTE: A/C operation toggles on & off when thermostat lever is moved to the HOT or COLD ends of travel. A/C mode is indicated by the blue A/C light.
22901074-EDZ REV F 08/21/18, PG 22 OF 24
Sym
pto
m
Con
dit
ion
Ch
ecks
A
ctio
ns
Not
es
Blo
wer
sta
ys o
n hi
gh s
peed
whe
n ig
nitio
n is
on.
1a.
No
othe
r fu
nctio
ns w
ork.
Che
ck f
or d
amag
ed p
ins
or
wires
in c
ontr
ol h
ead
plug
.Ve
rify
tha
t al
l pin
s ar
e in
sert
ed in
to p
lug.
Ens
ure
that
no
pins
are
ben
t or
dam
aged
in E
CU
.Che
ck f
or d
amag
ed g
roun
d w
ire
(whi
te)
in c
ontr
ol h
ead
harn
ess.
Verify
con
tinui
ty t
o ch
assi
s gr
ound
with
whi
te c
ontr
ol
head
wire
at v
ario
us p
oint
s.
Loss
of gr
ound
on
this
wire
rend
ers
cont
rol h
ead
inop
erab
le.
All
othe
r fu
nctio
ns w
ork.
Che
ck f
or d
amag
ed b
low
er
switc
h or
pot
entio
met
er a
nd
asso
ciat
ed w
irin
g.
Blo
wer
sta
ys o
n hi
gh s
peed
whe
n ig
nitio
n is
on
or o
ff.
Unp
lug
3-w
ire
BSC c
ontr
ol
conn
ecto
r fr
om E
CU
. If
blo
wer
sh
uts
off,
ECU
is e
ither
im
prop
erly
wired
or
dam
aged
.
Be
sure
the
sm
all,
20 G
A w
hite
gro
und
wire
is c
onne
cted
to
the
bat
tery
gro
und
post
. If
it is
, re
plac
e th
e EC
U.
Unp
lug
3-w
ire
BSC c
ontr
ol
conn
ecto
r fr
om E
CU
. If
blo
wer
st
ays
runn
ing,
BSC is
eith
er
impr
oper
ly w
ired
or
dam
aged
.
Che
ck t
o en
sure
tha
t no
BSC w
irin
g is
dam
aged
or
shor
ted
to v
ehic
le g
roun
d. T
he B
SC o
pera
tes
the
blow
er
by g
roun
d si
de p
ulse
wid
th m
odul
atio
n sw
itchi
ng.
The
posi
tive
wire
to t
he b
low
er w
ill a
lway
s be
hot
. If
the
“g
roun
d” s
ide
of t
he b
low
er is
sho
rted
to
chas
sis
grou
nd,
the
blow
er w
ill r
un o
n H
I.
Repl
ace
BSC (
This
will
req
uire
rem
oval
of ev
apor
ator
fr
om v
ehic
le).
No
othe
r pa
rt r
epla
cem
ents
sh
ould
be
nece
ssar
y.
Com
pres
sor
will
no
t tu
rn o
n (A
ll ot
her
func
tions
w
ork)
.
2.
Syst
em is
not
cha
rged
.Sy
stem
mus
t be
cha
rged
for
co
mpr
esso
r to
eng
age.
Cha
rge
syst
em o
r by
pass
pre
ssur
e sw
itch.
Dan
ger
: N
ever
byp
ass
safe
ty s
wit
ch w
ith
en
gin
e ru
nn
ing
. S
erio
us
inju
ry c
an r
esu
lt.
Syst
em is
cha
rged
.
1b
.
Trou
ble
shoo
tin
g G
uid
e
Che
ck f
or f
aulty
A/C
po
tent
iom
eter
or
asso
ciat
ed
wirin
g (N
ot a
pplic
able
to
3-po
t co
ntro
ls).
Che
ck f
or d
isco
nnec
ted
or
faul
ty t
herm
isto
r.
Che
ck c
ontin
uity
to
grou
nd o
n w
hite
con
trol
hea
d w
ire.
Che
ck f
or 5
V o
n re
d co
ntro
l hea
d w
ire.
Che
ck 2
-pin
con
nect
or a
t EC
U h
ousi
ng.
To c
heck
for
pro
per
pot
func
tion,
che
ck v
olta
ge a
t w
hite
/blu
e w
ire.
Vol
tage
sh
ould
be
betw
een
0V a
nd
5V,
and
will
var
y w
ith p
ot
leve
r po
sitio
n.
Dis
conn
ecte
d or
fau
lty
ther
mis
tor
will
cau
se
com
pres
sor
to b
e di
sabl
ed.
Red
wire
at A
/C p
ot s
houl
d ha
ve a
ppro
xim
atel
y 5V
w
ith ig
nitio
n on
. W
hite
w
ire
will
hav
e co
ntin
uity
to
chas
sis
grou
nd.
Whi
te/
Blu
e w
ire
shou
ld v
ary
betw
een
0V a
nd 5
V w
hen
leve
r is
mov
ed u
p or
dow
n.
3. Com
pres
sor
will
no
t tu
rn o
ff
(All
othe
r fu
nctio
ns
wor
k).
Che
ck f
or f
aulty
A/C
po
tent
iom
eter
or
asso
ciat
ed
wirin
g.
Che
ck f
or f
aulty
A/C
rel
ay.
Repa
ir o
r re
plac
e po
t/co
ntro
l wirin
g.
Repl
ace
rela
y.
See
blo
wer
sw
itch
chec
k pr
oced
ure.
23901074-EDZ REV F 08/21/18, PG 23 OF 24
Sym
pto
m
Con
dit
ion
Ch
ecks
A
ctio
ns
Not
es
Syst
em w
ill n
ot
turn
on,
or
runs
in
term
itten
tly.
4.
Wor
ks w
hen
engi
ne is
not
runn
ing;
shu
ts o
ff w
hen
engi
ne is
sta
rted
(T
ypic
ally
ear
ly G
en I
V,
but
poss
ible
on
all
vers
ions
).
Noi
se in
terf
eren
ce f
rom
eith
er
igni
tion
or a
ltern
ator
.
Inst
all c
apac
itors
on
igni
tion
coil
and
alte
rnat
or.
Ensu
re
good
gro
und
at a
ll po
ints
. Re
loca
te c
oil a
nd a
ssoc
iate
d w
irin
g aw
ay f
rom
ECU
and
ECU
wirin
g. C
heck
for
bur
ned
or lo
ose
plug
wires
.
Verify
con
nect
ions
on
pow
er
lead
, ig
nitio
n le
ad,
and
both
whi
te g
roun
d w
ires
.
Verify
pro
per
met
er f
unct
ion
by c
heck
ing
the
cond
ition
of
a kn
own
good
bat
tery
.
Igni
tion
nois
e (r
adia
ted
orco
nduc
ted)
will
cau
se t
he
syst
em t
o sh
ut d
own
due
tohi
gh v
olta
ge s
pike
s. I
f th
isis
sus
pect
ed,
chec
k w
ith a
qu
ality
osc
illos
cope
. Spi
kes
grea
ter
than
16V
will
shu
t do
wn
the
ECU
. In
stal
l a
radi
o ca
paci
tor
at t
he
posi
tive
post
of
the
igni
tion
coil
(See
rad
io c
apac
itor
inst
alla
tion
bulle
tin).
A
faul
ty a
ltern
ator
or
wor
n ou
t ba
tter
y ca
n al
so r
esul
tin
thi
s co
nditi
on.
Will
not
tur
n on
und
er
any
cond
ition
s.Ve
rify
bat
tery
vol
tage
is
grea
ter
than
10
volts
and
less
than
16.
Loss
of
mod
e do
or
func
tion.
No
mod
e ch
ange
at
all.
Che
ck f
or d
amag
ed m
ode
switc
h or
pot
entio
met
er a
nd
asso
ciat
ed w
irin
g.
Part
ial f
unct
ion
of m
ode
door
s.
Typi
cally
cau
sed
by
evap
orat
or h
ousi
ng
inst
alle
d in
a b
ind
in t
he
vehi
cle.
Be
sure
all
mou
ntin
g lo
catio
ns li
ne u
p an
d do
n’t
have
to
be f
orce
d in
to p
ositi
on.
Blo
wer
tur
ns o
n an
d of
f ra
pidl
y.
6.
Bat
tery
vol
tage
is a
t le
ast
12V.
Che
ck f
or a
t le
ast
12V a
t ci
rcui
t br
eake
r.En
sure
all
syst
em g
roun
ds a
nd p
ower
con
nect
ions
are
cl
ean
and
tight
.
Bat
tery
vol
tage
is le
ss
than
12V
.
5.
Trou
ble
shoo
tin
g G
uid
e (C
ont.
)
Che
ck f
or f
aulty
bat
tery
or
alte
rnat
or.
Cha
rge
batt
ery.
Syst
em s
huts
off
blo
wer
at
10V.
Poo
r co
nnec
tions
or
wea
k ba
tter
y ca
n ca
use
shut
dow
n at
up
to 1
1V.
7. Whe
n ig
nitio
n is
tu
rned
on,
blo
wer
m
omen
tarily
co
mes
on,
the
n sh
uts
off.
This
oc
curs
with
the
bl
ower
sw
itch
in
the
OFF
pos
ition
.
This
is a
n in
dica
tor
that
the
sy
stem
has
bee
n re
set.
Be
sure
the
red
pow
er w
ire
is o
nth
e ba
tter
y po
st,
and
not
on a
sw
itche
d so
urce
. Als
o, if
the
sy
stem
is p
ulle
d be
low
7V f
orev
en a
spl
it se
cond
, th
e sy
stem
will
res
et.
Run
red
pow
er w
ire
dire
ctly
to
batt
ery.
Che
ck f
or p
ositi
ve p
ower
at
heat
er v
alve
gre
en w
ire
and
blow
er r
ed w
ire.
Che
ck f
or g
roun
d on
con
trol
hea
d w
hite
w
ire.
Che
ck f
or o
bstr
ucte
d or
bi
ndin
g m
ode
door
s.Che
ck f
or d
amag
ed s
tepp
er
mot
or o
r w
irin
g.
Erra
tic f
unct
ions
of
blow
er,
mod
e,
tem
p, e
tc.
Che
ck f
or d
amag
ed s
witc
h or
po
t an
d as
soci
ated
wirin
g.Re
pair o
r re
plac
e.
8.
Checked By:Packed By:
Date:
1
2
Accessory Kit781074-PMN
Packing ListEvaporator Kit (571074-EDZ)
No. Qty. Part No. Description
1.2.
11
744004-VUE781074-PMN
Gen IV 4-Vent Evaporator Sub Case Accessory Kit 70-74 Challenger/Cuda without A/C
NOTE: Images may not depict actual parts and quantities. Refer to packing list for actual parts and quantities.
OFF
DASH
HOT
FLR
HI
DEF
COLD
A C
HOTCOLD
Gen IV 4-VentEvap. Sub Case
744004-VUE
901074-EDZ REV F 08/21/18, PG 24 OF 24
