Page 381
Wiring Diagrams, Fuses and Relays
371-133
Supplemental Restraint System (SRS)-Airbag
Operation
The supplemental restraint system (SRS) consists of two
front sensors, a control unit, a safety sensor, and the airbag
with gas generator. If a fault should occur in the system, the
SRS lamp in the instrument cluster will flash when the ignition
switch is turned to the run position. Fault codes in the system's
memory can be read by an authorized Saab dealer using special diagnostic equipment.
47T
75
158
331
332A
332B
333
336
SRS airbag waming lamp (see SRS warnings)
distribution block at right wheel housing
ground H distribution in main luse/relay panel
SRS alrbag control unit behind instrument panel, left grille. See SRS
warning
SRS airbag left sensor at left wheel housing in engine compartment.
See SRS warning.
SRS airbag right sensor at right wheel housing in engine compartment.
See SRS warning.
SRS airbag in steering wheel. See SRS warning.
slip ring contact In steering wheel
Connector Locations
WARNING
• The airbag is an explosive device. Do not attempt to remove
the steering wheel or service the wiring in the steering column
assembly without first disarming the SRS system. You could
accidentally ignite the airbag, causing serious personal injury.
See an authorized Saab dealer for any repairs to the SRS system or to disarm the system.
• The components and wiring used in the system should not
be altered or repaired as they are unique in design and construction. Additionally, do not connect ground wires from other
systems to the mounting screws for the front sensors or the
electronic unit since this may cause disturbances in the system, rendering it inoperative.
Fault Tracing
The following fault tracing should be used as a guide only.
Comprehensive fault tracing should be carried out by an authorized Saab dealer who has the necessary diagnostic
equipment and training.
1. Check the fuses.
Component Locations
1
20
21
22A
47E
47K
battery at right lront 01 engine compartment
ignition switch
ignition switch relay In main luse/relay panei
main luse/reiay panel at left wheel housing
charging lamp in Inslrument cluster
shift up indicalor lamp
· I ... _
U r~BIBEj1
r"l·
, ,I
• "fl.
.J
21
3328
333
1990
98
98
123
123
123
152A
152B
330
10-pin connector behind instrument panel to left 01 steering column
10-pin connector next to SRS airbag electronic unit
4-pin connector at the SRS airbag electronic unit
4-pin connector at the left SRS airbag sensor
4-pin connector at the right SRS airbag sensor
29-pin bulkhead connector at main luse/relay panel
29-pin bulkhead connector at main luse/relay panel
SRS airbag 10-pin connector in center console under rubber bellows.
See SRS warning
335 SRS airbag 2-pin orange connector below steering column. Pins are
short circuited when connector is separated. See SRS warnings
1991 and later
H3-16
H3-17
H4-10
H4-10
H4-11
H10-1
H10-2
H12-1
H29-1
H29-2
H33-1
H33-2
3-pin connector at the SRS airbag left front sensor
3-pin connector at the SRS airbag rightlront sensor
4-pin connector at 1he SRS airbag control unit
4-pin connector at 1he SRS alrbag at the control unit
4-pin connector at 1he SRS airbag at the control unit
10-pin connector behind instrument panel, left 01 steering column
10-pin connector at the SRS airbag control unit, left speaker grille. See
warning.
12-pin connector behind instrument panel, left of steering column
29-pin bUlkhead connector behind main fuse/relay panel (1991-1991 1/2)
29-pin bulkhead connector behind main luse/relay panel (1991-1991112)
33-pin bulkhead connector behind main luse/relay panel (1991 1/2-on)
33-pin bulkhead connector behind main luse/relay panel (1991 1/2 -on)
Ground Locations
7 ground point at radiator cross member
211 ground point at gearbox
334 SRS airbag ground poin110r electronic unit adjacent to electronic unit.
See SRS waming.
400 SRS airbag redundan1 ground point behind instrument panel, left side.
See SRS warning.
Page 382
371-134
Wiring Diagrams, Fuses and Relays
Supplemental Res raint System {SRS)-Airba
1990
75
'0 VT 6.0
5 GR 4.0
RO '6.0
12A GR vT 0.75
152A
22
12
J=_ _---JGR/VT 2.5
158
r---"--.
'23
GN/VT 1.5
CAB
'
IIG
VT 25
~
VT 25
59
'----v-"
IIG
VT 2.5
'"
d
d
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983
RA
1-
0.5
358
57
1
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9
17 6
3
11 20
7
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5
334
331
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400
334
rnm:J
01Sr1 199
C
334
Page 383
Wiring Diagrams, Fuses and Relays
371-135
Supplemental Restraint System (SRS)-Airbag
1991 and later
10 WH 6.0
7
GY 4.0
21
Gl
(22B: E)
20
50
I
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3 H12-1
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H3-16
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BK 0.5
YE 0.5
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3
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904 RD 05 335
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0
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G20
9
G20
1
17 6
3
16
11 20
18 19
7
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G20
331
922 BK 4.0
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G21
ih
G20
Ql5H 199
A
~
G20
Page 384
-371-136
Wiring Diagrams, Fuses and Relays
Ventilation Fan
Operation
Component Locations
The ventilation fan, located behind the instrument panel on
the right side, is controlled by the fan and air distribution
switches. Normally there are three fan speeds. If the air distribution swrtch (149) is switched to position 1, the fan swrtch
(35) is overridden and the fan runs at high. The resistor pack
provides various resistor values for different fan speeds. The
resistor pack (74) is thermally protected internally and will
blow the fuse if overheated.
For information on the related NC systems, see the Air
Conditioner (AlC) wiring diagram elsewhere in this section.
22A
35
36
74
149
150
main fuse/relay panel at left wheel housing
ventilation fan swnch in instrument panei
ventilation fan motor under right speaker grille
resistor pack for ventilation fan under left speaker grille
main switch for ventilation fan integrated in air distribution switch
air distribution switch in instrument panel
Connector Locations
1985·1990
152B 29·pin bulkhead connector at main fuse/relay panel
1991 and later
For information on repairing the heating and air conditioning system, see 854 Heating and Air Conditioning.
H29-2 29-pin bulkhead connector behind main fuse/relay panel (1991-1991 1/2)
H33-2 33-pln bulkhead connector behind main fuse/relay panel
(1991 1/2 and later)
Fault Tracing
Ground Locations
1. Check the fuse. If the fuse blows repeatedly, check the
resistor pack (74).
1985·1990
3 ground point behind instrument panel
1991 and later
G8 ground point behind instrument panel
149
36
74
150
Page 385
Wiring Diagrams, Fuses and Relays
Ventilation Fan
+54
I
I
llF
WH 25
,
r:""1
r:""1152B
29
H29-2
1
L...o...J
H33-2
103 VT 25
105A YE 15
35
I
I
I
103A
VT 25
I
I
I
I
I
I
108
106
GN 25
BU 15
2
4
1
:5
105
YE 1.5
5
2
8
74
1 3
104
107
107A
GY 25
BK 2.5
BK 25
I
L __ - - I
149
2-6
0-1
104A
GY 2.5
J60
36
17
BK 60
3
G8
015H 027
A
~
371-137
Page 386
371-138
Wiring Diagrams, Fuses and Relays
Wipers and Washers
Operation
Component Locations
The windshield wipers have three speeds controlled by the
wiper stalk switch (61). The intermittent speed is controlled by
the intermittent windshield wiper relay (83). The windshield
wiper motor (62) has a park switch that interrupts voltage to
correctly park the wiper blades at the base of the windshield
after the stal k switch has been shut off.
The headlight wipers are controlled by the wiper stalk
switch (61). When the wiper stalk switch is pulled toward the
driver, the windshield washer pump (63) is energized and the
wipers will run (via the intermittent relay 83) for 5 cycles. The
headlight wiper motor (66), has a park switch that interrupts
voltage to correctly park the wiper blades at the base of the
headlight after the stalk switch has been released.
22A
61
62
63
66
83
main fuse/reiay panel
wiper stalk swnch on steering column
windshield wiper motor at engine compartment firewall
windshield washer motor below fluid bottle in engine compartment
headlight wiper motor behind headlight assembly
intermittent windshield wiper relay to left of steering column, behind instrument panel
158 ground (-) distribution in main fuse/relay panel
Connector Locations
1985-1990
59 2-pin connector at the washer bottle
152B 29-pin bulkhead connector at main fuse/relay panel
152C 29-pin bulkhead connector at main fuse/relay panel
1991 and later
See 363 Wipers and Washers for information on removing
and installing the wiper motor mechanism, the headlight wipers, and the washer pump.
Fault Tracing
1. Check the fuses. Check for approximate battery voltage
with the key in the run position using the table below.
H3-1 3-pin connector at front of engine compartment. right Wiper motor
H3-2 3-pin connector at front of engine compartment, left Wiper motor
H29-2 29-pin bulkhead connector behind main fuse/relay panel (1991-1991 1/2)
H29-3 29-pin bulkhead connector behind main fuseirelay panel (1991-1991 1/2)
H33-2 33-pin bulkhead connector behind main fuse/relay panel
(1991 112 and later)
H33-3 33-pin bulkhead connector behind main fuse/relay panel
(1991 1/2 and later)
Ground Locations
Table a. Wiper and Washer Electrical Tests
Switch
terminal (pin)
Windshield
wiper motor
terminal (pin)
Intermittent
relay terminal
(pin)
o off
53A (1)
53A (2)
15 (2)
liNT
53A (1)
INT (5)
53A (2)
15 (2), I (8)
II slow
53A (1),53 (2)
53A (2) 53 (5)
15 (2)
III fast
53A (1)
538 (4)
53A (2)
538 (4)
15 (2)
A* wash
53A (1)
54(7),318
(3),53 (2)
53 (5)
T (5), 15 (2),
53M (1)
Position
I
1985-1990
3 ground point behind instrument panel
7 ground point at radiator cross member
1991 and later
G1 ground point at radiator cross member
G6 ground distribution in main fuse/relay panel
G8 ground point behind instrument panel
* check for voltage at the Windshield washer pump (63), and headlight wiper motors
61
62
63
66
Page 387
Wiring Diagrams, Fuses and Relays
371-139
Wipers and Washers
+54
I
I
l1A
WH 25
61
4
[5
62
yo ,
"'] 85 8N 15
.J
' \ 5.3A
~--'11-"'-"~-~-f" -o'C-.
H33 -2
858
BN 15
]
85A
I"
BN 1.5
I
I
",.
l»
I 53B 4
(M85-M86)
.31
1
-J....--.J
r-"''''''--!''-'''L..!.'.!..!.--,I..oO.5"-h 4 et-"'8.'d.!8A~8~UL'.
I'W!..'.H'.......!..o.1.o!...5_-+_---"'..3~53"-=S'.q,.
2 15 " - 53M
-
H33-3
n
91AGL075
910
23 3~ 83 BK 0.75
J5(M91-on)
0--
1
2
8K 0.75
7
G1
88
BU 15
91A YE 0.75
4
31
.n. r
I
8
84 WH 0.75
~~~J6~ ~~91~n) 1_.t_-"-T.t~~_.=.c91'---!...'YE~0.-'--75"---.J
1..-......
17
BI< 5.0
rt73
G8
US9"lAGL075
8'
1
83
GLO.75
910 YE 0.75
3
-J........J
1-""53""8'-1-'-4--j_ _--'8"-".7....:G"'-N'--'-'1."'-.5_ _t:l 3 et-"'8.!....7-"G"-'.N--'l"-'.5'--_ _-+
3
.318
'0
-
318
5
I 53 2
,-_5"".31"'5_f-_....:8
",,5'-'-'.!RO,,--,,1.co!.5_ _-b 2 CJ-"8"'-.5-'.:R""O--'J..oO.5'--_ _-+
2
tNT
,-0
152C
H29-3
53A
7
AY+
152 B
H29-2
85 8N 1.5
54
Page 388
371-140
Wiring Diagrams, Fuses and Relays
Headlight Wipers
+54
+54
I
I
I
I
11E
WH 25
11A
WH 2.5
0--
-~~~\
95
RD/WH 0.75
=
=-
85
BN 1.5
I
I
61
54 7
H33-2
~:~Cl2- "8-"-5
H
--"B"-'.N---,1-'-'O.5,-------'-1'
e:Il"
'-'l..I
I
I
"
III
INT 5
II
53B 4
53 2
w
J5
H29-3
H33-3
0I-"-,-",----,-,=--"",-,--",-----+++--"-91,-,-A,---Y-,-,E,,----,,,0.,,--75>C--I) 6 (1--"9-,,1A-,---,-Y,=-E__'0"-'..7~5
>-
0;
~
T
83
91D YE 0.75
015H 021
A
~
Page 389
Wiring Diagrams, Fuses and Relays
371-141
Component List-Numerical
(page 1 of 4)
1 battery-right front of engine compartment
2 alternator-back of engine compartment
3 ground point-behind instrument panel
4 starter motor-under intake manifold
5 ignition coil-on top 01 radiator
6 ignition distributor-end 01 cylinder head
7 ground point-radiatur cross member
8 headlight relay-main fuse/relay panel
9 ground point-luggage compartment
10 lighting switch
11 high beam headlight
12 low beam headlight
13 parking lights
14 rear lights
15 license plate lights
16 rheostat for instrument cluster
17 rheostat for instrument panel lighting
18 instrument lighting
19 glove compartment light
20 ignition switch
21 ignition switch relay-main 1use/relay panel
21A ignition switch relay-in fuse/relay panel (401) under rear seat
22/22A main fuse/relay panel-left wheel housing
23 flasher relay-behind instrument panel, left side
24 direction indicator stalk switch
25 hazard waming switch
26 coolant fan time delay relay-front left wheel housing
27 left-hand direction indicator lamps
28 right hand direction indicator lamps
29 brake light switch-brake pedal cluster
30 brake lamps
31 backup light sWitch-gear selector housing
32 backup lights
33 rear fog lights
35 ventilation fan switch-instrument panel
36 ventilation fan motor-under right speaker grille
37 radiator cooling fan motor-behind radiator
38 recirculation valve-behind instrument panel, near right side A pillar
39 coolant fan temperature switch-upper left corner of radiator
40 horn-engine compartment
41 horn switch-in steering wheel
42 brake fluid level switch-brake fluid reservoir
43 handbrake switch-under handbrake
44 oil pressure sWitch-left side of engine, above oil filter
45 coolant temperature transmitter-front of cylinder head
46 fuel level transmitter-in fuel tank, accessible in luggage compartment
47 instrument cluster
47A fuel level gauge
478 fuel waming light
47C coolant temperature gauge
470 oil pressure warning light
47E charging lamp in instrument cluster
47F brake warning light
47G full-beam warning light
47H left-hand direction indicator warning lamp
471 right-hand direction indicator warning lamp
47J rear window heater warning lamp
47K shift-up indicator lamp
47M handbrake warning lamp
47N rear fog light warning lamp
47P CHECK ENGII\lE light
470 A8S warning lamp
47S passive seat belt warning lamp
471 SRS airbag warning lamp (see warnings)
47U cruise control warning lamp
48 cigarette lighter
49 clock
50 roof lamp/switch-to left of driver
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
82
83
85
88
89
90
91
93
94
98
101
102
103
107
109
110
113
115
116
117
118
119
121
122
123
124
125
126
127
128
131
132
133
134
136
141
143
144
145
146
front roof lamp-center rear view mirror
ignition switch light-next to ignition switch, center console
interior light switch-center console
door switches-on door jamb
luggage compartment light-storage area
luggage compartment light switch-storage area
3-pin connector
12-pin connector
2-pin connector
1-pin connector
wiper stalk switch-steering column
windshield wiper motor-engine compartment firewall
windshield washer motor-below fluid bottle in engine compartment
heated seat pad with thermostat-in seat cushion and backrest
ground point-at handbrake
headlight wiper motor-behind headlight assembly
6-pin connector
horn relay-main fuse/relay panel
passenger seat belt switch-under seat cover
seat belt switch, driver side-between driver and passenger seat
seat belt sWitch, passenger side-between driver and passenger seat
seat belt warning light-center of instrument panel
TSI (test service instrument) socket-in main fuse/relay panel
resistor pack for ventilation fan-under left speaker grille
distribution block-right wheel housing
switch for raising idle speed (automatic transmission)-center console
neutral safety switch (automatics only)-gear selector lever
seat belt warning relay-under rear seat
intermittent windshield Wiper relay-behind instrument panel, left side
fog lamps
switch for fog lamps
left fender direction indicator
right fender direction indicator
gear indicator light-at gear selector lever (automatics)
ground point-left wheel housing
starting injector-throttle housing
10-pin connector
supply fuel pump-in fuel tank
fuel pump relay-at LH control unit 200, forward of rf. door
main fuel pump-in fuel tank
relay for extra lamps
third brake lamp (high mount brake light)
tachometer
time delay relay 10r heated rear window-under rear seat
rear window heater element
rear heated window switch
ground point-at handbrake
cornering lights-in front clusters
side backUp lights in front light clusters
passenger seat switch for heated seats-under passenger seat
8-pin connector
4-pin connector
left power mirror switch-instrument panel
right power mirror switch-instrument panel
left power mirror motor-in left mirror
right power mirror motor-in right mirror
speed control relay-behind instrument panel, left side
control unit for cruise control-behind instrument panel, left side
speed transmitter-at rear of instrument cluster
clutch switch for cruise control-at clutch pedal
brake switch for cruise control-at brake pedal
lambda exhaust sensor-in exhaust manifold
selector for cruise control-direction indicator stalk
recirculation switch
boost pressure switch (turbo)
ElK test connector-next to main fuse/relay panel
ignition control unit (non-ElK ignition)
ignition amplifier (ElK ignition)-in front of left wheel housing
Page 390
371-142
Wiring Diagrams, Fuses and Relays
Component List-Numerical
(page 2 of 4)
147
148
149
150
151
152A
152B
152C
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
190a
191
191 a
193
194
200
201
202
203
204
205
206
207
2080
208P
211
215
225
ignition pulse amplifier-main fuse/relay panel, position 0
ashtray lighting
over-ride switch for ventilation fan-integrated in air distribution switch
air distribution switch-instrument panel
interior lighting time delay relay-under rear seat
29-pin bulkhead connector-main fuse/relay panel (white)
29-pin bulkhead connector--main fuse/relay panel (red)
29-pin bulkhead connector-main fuse/relay panel (black)
cigarette lighter lamp
heater control lighting
relay for AlC cooling fan-main fuse/relay panel
AlC compressor relay-main fuse/relay panel
sparkplug
negative (ground) distribution in main fuse/relay panel
+15 distribution in main fuse/relay panel
glovebox light switch-side of glovebox
rear fog light switch
switch for driver power window---center console
switch for passenger power window---center console
power window motor-left front door
power window motor-right front door
AlC pressure switch for cooling fan-on receiver/dryer unit
AlC throttle switch-throttle housing
AlC coolant temperature switch-radiator hose near distributor
AlC switch-instrument panel
AlC compressor-top of engine near firewall
AlC anti freeze-up thermostat-behind instrument panel, right side
AlC cooling fan-behind radiator
AlC compressor diode-engine wiring harness, rear of valve cover
relay for daytime driving lights
central locking control unit-behind instrument panel right side
EZK control unit-inner left fender
APC control unit-under back seat (1985), ahead of left wheel housing
(1986 and later)
knock sensor-engine block, below intake manifold
APC boost pressure solenoid valve-above radiator fan on radiator
boost pressure sensor behind instrument panel to left of steering column
power sunroof or convertible switch
power sunroof motor-luggage compartment at spare tire compartment
key switch for driver's central door locking-driver door
central door lock motor-passenger door
central door lock motor-right rear door
central door lock motor-left rear door
cruise control vacuum pump-engine compartment left wheel housing
central door lock motor-tailgate lock
lockout switch for rear power windows
switch for left rear power window---center console
switch for left rear power window-left rear door
switch for right rear power window-center console
switch for right rear power window-right rear door
power window motor-left rear door
power window motor-right rear door
lH fuel injection control unit-forward of right front door, behind trim
lH ground point for fuel injection---engine lifting lug, 2 points
LH engine temperature transmitter-intake manifold flange, between
cylinders 2 and 3
LH throttle angle transmitter-on throttle housing
LH test connector---engine compartment, behind right wheel housing
LH air mass meter-in throttle intake hose
fuel injectors-intake manifold
heated rear view mirrors-front doors
passive seat belt door switch-clriver door
passive seat belt door switch-passenger door
ground point-gearbox
headlight dip switch
reading lights, convertible-back seat
229 LH fuel injection main relay-at LH ~ontrol unit 200, behind A pillar trim
at passenger door
233 cruise control vacuum switch---engine compartment left wheel housing
234 side marker lights in front light clusters
252 driver heated seat rheostat-instrument panel
254 driver seat temperature thermostat-in driver seat
257 ground point-alternator bracket
261 throttle contacts for shift-up indicator-throttle housing
262 temperature switch for shift-up indicator-between center intake ports
of inta~;e manifold
263 vacuum switch for shift-up indicator-left wheel housing
264 5 gear switch for shift-up indicator-front side cover of gearbox
265 electric radio antenna-left rear body panel
266 radio speakers-(4) two in front, two in rear
267 radio connector-instrument panel
270 shift-up indicator relay-main fuse/relay panel
271 lambda preheater (integral with lambda sensor)
272 AIC valve (LH idle speed motor)-front left side of cylinder head
273 motor for convertible hydraulic pump-under rear seat, right side
274 fuse for burglar alarm under rear seat
275 burglar alarm siren---engine compartment near right headlamp
276 burglar alarm hood switch-under hood at front of wheel housing
277 relay for raising convertible top (1987-1988)-under rear seat on bulkhead
277 relay for raising convertible top (1989 and later)--under rear seat in
fuse/relay panel 401
278 relay for lowering convertible top (1987-1988)-under rear seat on
bulkhead
278 relay for lowering convertible top (1989 and later)-under rear seat in
fuse/relay panel 401
279 mercury switch for convertible heated rear window-left side top
mounting
283 diodes for convertible top (1987-1988)--under rear seat in wiring harness
285 fuse for lambda sensor---engine compartment, next to fresh air intake
287 power window relay for automatic control-under rear seat
288 burglar alarm switch---center console
289 burglar alarm control unit-under rear seat
290A fuse for convertible top---engine compartment, next to distribution
block 75
290B fuse for convertible top---engine compartment, next to distribution
block 75
291 ABS control unit (1989)--engine compartment, left wheel housing
291 ABS control unit (1990 and later)-under rear seat, right side
292 ABS system relay (1989)--ABS distribution box, engine compartment,
left wheel housing
292 ABS system relay (1990 and later)--ABS distribution box, behind right
wheel housing
293 ABS pump relay (1989)-ABS distribution box, left wheel housing
293 ABS pump relay (1990 and later)-ABS distribution box, behind right
wheel housing
294 ABS pressure switch-on 302 ABS electrical distribution box
(1990 and later)---engine compartment, behind right wheel housing
295 ABS master valve-on hydraulic unit, engine compartment
296 ABS valve block-forward of left wheel housing
297 ABS hydraulic pump motor---engine compartment at hydraulic unit
298A ABS wheel sensor-left front wheel
298B ABS wheel sensor-right front wheel
298C ABS wheel sensor-left rear wheel
2980 ABS wheel sensor-right rear wheel
299 ABS brake fluid level sensor-brake fluid reservoir
300 ABS ground point-at front of hydraulic unit, engine compartment
302 ABS electrical distribution box (1989)---engine compartment, forward
of left wheel housing
302 ABS electrical distribution box (1990 and later)---engine compartment,
behind right wheel housing