Page 261
Wiring Diagrams, Fuses and Relays
371-13
Air Conditioner (AlC)
Operation
150
155
156
158
166
167
168
169
170
171
172
173
200
203
396
The air conditioner is controlled by the NC sWitch (component 169) and the recirculation switch (component 143) on the
instrument panel. The NC compressor (component 170) and
evaporator are protected by pressure and temperature safety
switches. The system also has an NC cooling fan (component 172) behind the radiator. Idle speed compensation is
done by the AIC valve.
For NC repair information see 854 Heating and Air Conditioning. For repair information on the cooling system see 261
Radiator and Cooling System.
air distribution switch in instrument panel
relay for AlC cooling fan in main fuse/relay panel
AlC compressor relay in main fuse/relay panel
negative distribution in main fuse/relay panel
AlC pressure switch for cooling fan in receiver/dryer unit, near baftery
AlC throttle switch in throttle housing
AlC coolant temperature switch in radiator hose near distributor
AlC switch in instrument panel
AlC compressor at top of engine near firewall
AlC antifreeze thermostat in instrument panel, right side ahead of A pillar
AlC cooling fan behind radiator
AlC compressor diode in engine wiring harness, rear of valve cover
LH control unit, forward of right front, door behind trim
throttle angle transmit1er on throttle housing
radiator fan relay in main fuse/relay panel
Connector Locations
WARNING
Air conditioner repair and service requires special tools and knowledge. Pressures in excess of 300 psi are created in the system.
The refrigerant (R12) can be poisonous and can immediately
freeze anything it contacts including eyes and skin. Always wear
eye protection and gloves when working on the Ale system.
1985-1990
59
59
60
67
152A
152B
152C
Fault Tracing
2-pin connector next to radiator cooling fan
2-pin connector next to AlC cooling fan
1-pin connector at AlC compressor, top rear of engine
6-pin connector in engine compartment near fresh air intake
29-pin bulkhead connector in main fuse/relay panel
29-pin bulkhead connector in main fuse/relay panel
29-pin bulkhead connector in main fuse/relay panel
1991 and later
H1-10 1-pin connector near AlC compressor in engine compartment
H2-1 2-pin connector at the radiator fan motor
H2-2 2-pin connector next to AlC cooling fan (172)
H2-10 2-pin connector behind cigarette lighter
H6-2 6-pin connector in engine compartment right wheel housing
H29-3 29-pin bulkhead connector behind main fuse/relay panel (1991-1991 1/2)
H33-3 33-pin bulkhead connector behind main fuse/relay panel
(1991 1/2 and later)
1. Check the fuse(s).
2. Listen for an audible click of the compressor clutch
when pushing the NC switch on with the key on.
3. Check for voltage at the NC compressor (component
170) and the NC cooling fan (172).
Component Locations
Ground Locations
1985-1990
20
22A
35
37
38
ignition switch
main fuse/relay panel in left wheel housing
ventilation fan switch in instrument panel
radiator cooling fan motor behind radiator
recirculation valve (solenoid)
1985-1987 in engine compartment, right wheel housing
1988 and later- behind instrument panel, near right side A pillar
74 resistor pack for ventilation fan under the left speaker grille
143 recirculation switch in dashboard
149 main switch for ventilation fan integrated in the air distribution switch
3 ground point behind instrument panel
7 ground point at radiator cross member
201 ground point for fuel injection at engine lifting lug. 2 points
1991 and later
G1
G6
G7
G8
ground point at radiator cross member
ground distribution in main fuse/relay panel
ground point in engine lifting lug
ground point behind instrument panel
37. 172
38
~.
.A~t
..~
'~.
67
168
~ 15~
@
-----:;;;
396\
iicQ -mr[~J,1
'.
50
-
~
171
.h
156 (M86 on)
149
156 (M85)
~
200
166
203 (EZK, LH 2.41
~
Page 262
371-14
Wiring Diagrams, Fuses and Relays
Air Conditioner (AlC)
1985
+54
11F
'IT 25
"R
'IT 2 e,
1~f.B
10j VL
Ie,
2q
103 VL 25
151(
116 uL/RU 075
25
116 ul/fW 07)
35
S99l GR 07S
z
38
~ JB
'-,v
075
158
151(
116B BL 07S
26
1168 BL 075
p 166
402 BL 075
8 171
+30
LO') HL/V; 01')
51':
B6
8S
7A
87
67
200
r-,
I
I
L~
.--------}
417
RO 0 7S
173
1
112A
! c;
c~ 'v
7 (]lli§]
Page 263
Wiring Diagrams, Fuses and Relays
Air Conditioner (AlC)
1986-1988
+~4
11F
VT25
I03VL25
151C
38
C><J
~99 GR 0 7,5
S2C
U'--~--I.....L.IL.:-./!=~15B
l.....oC)-+-----+------.....J
L . . - - - - -.........r--
C>.<I
t:1..B.a..
599GR075
43BSV075
'45BBR/VT075
214BBR/VT 075
----17 us, CA,JP
__---+-----:.1~16(:..:B~R~/Y~r.::...2
7:...,;:.5-< )_--,5::...:.9~B.!l!/.2.Y..!...T ~o7~5
116G
r-6--<1......._....JGLiRD IS
116E
ell'S
268
60
151C
116F GL/RD 15
116BBL075
26
406 BL 075
27
116BBL075
402BL075
406BL075
8 171
405BL/VT075
.15
20
:50
51(
GR25
201
116>..., T16>'"
201
544RD/YT075
+54
llB
VT25
371-15
Page 264
371-16
Wiring Diagrams, Fuses and Relays
Air Conditioner (AlC)
1989-1990
+54
I
1118
VT 2.5
6
122A
116
GL/RO 1.5
152C
25
116
GL/RO 1.5
1160
Gl./RD 0.75
116A Gl RO 0.75
409A
45B
599
8R/VT 0.75
GR 0.75
SV 0.75
116 4
3
116C BR VT 0.75
17
59 BR VT 0.75
US,CA
~
116G GL RD 1.5
1168 BL 0.75
166
402 BL 0.75
406 BL 0.75
200
r--,
I
I
I
I
I
I
I
I
1) 544 RO VT 0.75
I
116\,T16\
67
4
544 RD
+30
+15 20
T 0.75
150
I
I
L __ 3
I
51<
GR 2.5
I/)
N
d
«
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0
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a
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177201
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0
N
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a
407 BL 0.75
G
8
113
7~
Page 265
Wiring Diagrams, Fuses and Relays
371-17
Air Conditioner (AlC)
1991-1993 non-turbo
+54
11
WH 2.5
~
H33-3~ H29-3
143
1160
YE/RD 0.75
116A YE RD 0.75
38
458
BN/WH 0.75
116 4
YE
2148
BN/WH 0.75
J34
116C 8N WH 0.75
17
59 8N WH 0.75
US,CA
116G YE RO 0.75
RHO
1.5
1168 BU 0.75
p 166
402 8U 0.75
406 8U 0.75
Iil
N
0
0:::
~
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lIJ
o
<t
v
110A
YE 2.5
1108
YE 25
Iil
<D
116E 8U 05
r
r -1;- a...-.:..:~=..L':":"':":-"':::':"':"'''----to
21
878
87
1
361 544 RD WH 0.75
J
2
1
1
L
156
200
1
301
(228:H)
1
L
85
1396
1(228; G)
30
155
(228: J)
87.J
2
1
~:! 1
L_~_G.J
403
1118
RD 1.5
GN 2.5
403B
RD 1.5
111A
GN 2.5
112
112A
BK 2.5
BK 2.5
173
170
J8
G7
01~H
028
0
G1
G6
G1
~
Page 266
371-18
Wiring Diagrams, Fuses and Relays
Air Conditioner (AlC)
+54
~I:.:::,
'
1991-1993 turbo
WH 2.5
J30
r-t;5
I
~. 1
22A
~I~~
legl
yr!Ro ~
143
H29- 3 "
II.
1160
Y[fRD 0.7:)
Lf!-'=
Y[/RO a 7~
-----,1 +I~J36
- j_ _'!l'!!-'.' -!!V'lL!ORO'--' O.!.' ' --
3B
'56
BN/WH 0.75
2146
8N/WH 0.75
l16e BN
J34
H 0,75
17
59 ON Wi"t 0, 7~
US.CA
116C Y( RQ 0.75
RHO
15
11GB Bu 0.75
p 166
402 au 0.75
r""'-"'='-"''-"--p,,'''''---'''''06''''''''B''-U-''0'-'.'=-5
_
+ 0
+15 20
159. 150
LH 2.4
;:
58
Cy 40
I
.
w
>
0.75
N
x
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~
•
0
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~
.
~
0
~
~
x
0
.,;5
u
~
0
=>
m
~
0
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fK
JI
5
'0'
'20
81< 0.5
RO 1.5
1118
GN 2.5
,r-----'
lilA
GN 2.5
J27 ~1-""",'C---"'CN'--"0..!.'5'----_--;:~~~-4~,
'"
eN 2.5
155
P~B:J)
IliA
WH 25
II:'
6K 2:)
Gl
O'!lH,"8
°
Page 267
Wiring Diagrams, Fuses and Relays
371-19
Alternator and Charging System
Operation
NOTE
If a load tester is not available, an output test can be done by
running the engine at 2000 rpm and tuming on all electrical
loads such as fans, lights and heated window. Voltage at the
battery should be approximately 12 volts or higher.
The alternator supplies the electrical components and recharges the battery. The alternator is not 'fused. Voltage regulation is controlled internally by a regulator. The alternator
circuit includes a warning lamp in the instrument cluster. If the
lamp burns out, the alternator will not charge the battery properly. See 853 Dashboard and Consoles and 351 Lighting
for information on changing the lamp.
Component Locations
1
2
4
21
22A
47E
75
159
See 321 Alternator and Charging System for alternator
and charging system repair information and additional fault
tracing.
CAUTION
• Do not disconnect the battery or any wire when the engine is
running. Do not reverse the polarity of the battery. Do not ground
any altemator terminals. This will damage the altemator.
battery
alternator in back of engine compartment
starter motor under intake manifold
ignition switch relay in main fuse/relay panel
main fuse/relay panel in left wheel housing
charging lamp in instrument cluster
distribution block in right wheel housing
+ 15 distribution in main fuse/relay panel
Connector Locations
1985-1990
• Always disconnect the negative (-) battery cable before removing the altemator. Unfused battery voltage is always
present at the rear of the altemator.
59
152A
1528
152C
• Always disconnect the negative (-) battery cable and all
wires to the altemator before doing any electric (arc) welding
to the car.
2-pin connector in main fuse/relay panel
29-pin bulkhead connector behind main fuse/relay panel
29-pin bulkhead connector behind main fuse/relay panel
29-pin bulkhead connector behind main fuse/relay panel
1991 and later
H29-1
H29-2
H29-3
H33-1
29-pin bulkhead connector behind main fuse/relay pane I (1991-1991 1/2)
29-pin bulkhead connector behind main fuse/relay panel (1991-1991 1/2)
29-pin bulkhead connector behind main fuse/relay panel (1991-1991 1/2)
33-pin bulkhead connector behind main fuse/relay panel
(19911/2 and later)
H33-2 33-pin bulkhead connector behind main fuse/relay panel
(19911/2 and later)
H33-3 33-pin bulkhead connector behind main fuse/relay panel
(1991 1/2 and later)
Fault Tracing
1. Inspect the V-belts and make sure they are tight. Test
for a fully charged battery as described in 311 Battery.
2. Check for faulty connections and broken wires.
3. If no visible faults can be found, test the alternator output using an alternator load tester.
Ground Locations
1985-1990
7 ground point at radiator cross member
158 ground distribution in main fuse/relay panel
211 ground point on gearbox
Alternator output specification
• Bosch type 80 A
54 Amps @ 1900 rpm
1991 and later
G1 ground point at radiator cross member
G6 ground distribution in main fuse/relay panel
G25 ground point on gearbox
~----
[IU IlLLJ
r-r - [_~'I~--"-_.1"
~~,=-Jl
!
2
21,22a
C
I
47E,110.
75
Page 268
-371-20
Wiring Diagrams, Fuses and Relays
Alternator and Charging System
1985-1986
M1985
M1986
+15
+54
I
123K
GN/VT
llC
10
VT 15
71
GL/RD 1.0
123G
GN/VT 0.75
,
195
GN/VT 0.75
6 RO 10
RO 25
+
BUS
195 GN/VT 0.75
Page 269
Wiring Diagrams, Fuses and Relays
Alternator and Charging System
1987-1990
10
BL 25.0
RD 25.0
VT 60
20
211
54
152A
~
...cAB
V\
,'C
VT 25
~
25
59
l1C
VT 25
~
1528
182
BL 05
~~
M88-M90
.-..Mal
,--t-' ,--t-'
I
I
I
I
L._
I
I
9_.J
L._
\
147E
I
8_.J
/
V
195
GN/VT 05
152C
I
I I~I I
47EI
371-21
Page 270
371-22
Wiring Diagrams, Fuses and Relays
Alternator and Charging System
1991-1993
75
RD 160
7 GY 4.0
+k-'-"='-~------IK---ek---------------'---------,
U25~'60
E
G25
10
WH 6.0
RD 250
20
G1
54
H29-1
H33-1
,--.:.1=2A-,---=--,CY--,---!-'.'-'WH------,--,0.-'.'-'75 '-----[22 CI--:"='-"::'~-'--'------'-''-=---------.J
--+--+21
85
""""';-+-""";"';+-oi
(228: E)
5
13
BK 0.5
~~J:~5
JG6
H33-2
------E3
J68
71
YE RD 10
---8----1
182
BU 0.5
~
H29-2
182
BU 0.5
r1
I
I
L_
3 -,
1
147E
1
8_.J
195
GN!WH 0.5
H29-3
01SH 402
A
4
H33-3
[5]
~