ELECTRONIC
SPARK
TIM IN G
EST SIGNAL
EST REF. PULSE HI
EST BYPASS
EST REP. PULSE LO
4 2 3
4 3 0
4 2 4
4 5 3
4 2 3 - 8 WHT
4 3 0 .8 PPL/WHT
4 2 4 .8 TAN/BLK
1 2 0 4 0 7 5 4
E.V .R .V .
(L 05, LI9, LB4
HEAVY DUTY
ONLY)
AIR
SW ITC H
4 5 0 .8 BLK/WHT •
4 3 5 .8 GRA
4 3 9 - 8 PNK/BLK
4 3 9 -.8 PNK/BLK -
4 3 6 -.8 BRN ------
1 2 0 1 6 7 9 2
INJ-2
4 6 8 .8 GRN -
4 8 2 - 8 WHT
4 6 7 .8 BLU
4 8 1 . 8 RED-
STEPPER
MOTOR
441
<S>
\
4 4 2
4 4 3
I
44 4
4 4 3 .8 LT GRN/WHT
4 4 2 .8 LT BLU/BLK -
4 4 1 -.8 LT BLU/WHT
IDLE AIR CONTROL
(LB4. L0 3 . L05)
1 2 0 1 5 7 9 8
4 4 4 .8 LT GRN/BLK
IDLE AIR
CONTROL
(LI9)
44 4
I44?
------------ .
I
I
n
i
i
I_____
W
i
•—
1 2 0 4 0 7 5 4 |______
4 5 0 .8 BLK/WHT •
4 2 3 .8 WHT -------
4 3 0 .8 PPL/WHT •
4 2 4 - 8 TAN/BLK •
4 5 3 .8 BLK/RED •
4 3 5 .8 G R A -------
SPLICE 4 3 6
4 3 6 -.8 BRN
4 3 6 .8 BRN
- 4 6 8 .8 GRN
- 4 6 7 .8 BLU
SPLICE
4 8 1 .
4 8 2
9 2 0 -1 .0 PNK/BLK
4 4 0 -1 .0 ORN
1 2 0 5 2 3 8 4
FUEL PUMP OIL
PRESSURE SWITCH
FUEL
PUMP
RELAY
4 9 0 .8 RED/WHT
4 6 5 - 8 DK GRN/WHT
9 2 0 -1 .0 PNK/BLK-----
4 5 0 -1 .0 BLK/WHT ■
1 2 0 5 2 2 8 7
4 4 0 -1 .0 ORN -------
V
- 4 6 5 .8 DK GRN/WHT
- 1 2 0 .8 TAN/W HT -----
- 4 3 9 - .8 PNK/BLK -------
- 4 3 9 -.8 PNK/BLK--------
- 4 9 0 .8 RED/WHT -----
- 4 8 1 . 8 RED --------------
-4 4 0 -1 .0 ORN ----------
-4 4 0 - 1 .0 ORN ----------
LB 4.L03 ONLY
- 4 5 0 -1 .0 BLK/WHT •
TO HOT FUEL
HANDLING MODULE (L 05.L 19)
TO FUEL
METER & PUMP
LB 4.L03
ONLY
'
|
*
«t
oc
a
GROUND
4 4 4 .8 LT GRN/BLK -
4 4 3 .8 LT GRN/WHT
4 4 1 . 8 LT BLU/WHT ■
4 4 2 .8 LT BLU/BLK -
4 5 0 .8 BLK/WHT -----
4 2 3 -.8 WHT ------------
4 3 0 .8 PPL/WHT
4 2 4 .8 TAN/BLK
4 5 3 - 8 BLK/RED -
4 3 5 .8 GRA -------
4 3 5 .8 GRA -------
4 3 6 - 8 BRN -------
- 4 3 6 - 8 B R N --------
4 1 3 .8 TAN -------
4 5 0 .8 BLK/WHT -
4 5 0 -1 .0 BLK/WHT
4 6 8 .8 GRN ---------
4 6 7 .8 BLU ----------
4 6 5 .8 DK GRN/WHT
12 0 -.8 TAN/W HT -----
4 3 9 .8 PNK/BLK -------
4 3 9 .8 PNK/BLK -------
4 9 0 -.8 RED/WHT ------
4 8 1 -.8 RED --------------
4 4 0 -1 .0 ORN -----------
4 4 0 -1 .0 ORN -----------
4 3 9 .8 PNK/BLK -------
4 5 0 -1 .0 B LK /W H T ----
GROUND
1 2 0 -1 .0 TAN/W HT
SPLICE
9 2 0
"T
\
1 2 0 3 3 7 6 9
9 2 0 -1 .0 PNK/BLK
ELECTRONIC CONTROL M O D ULE-O UTPUTS
LB4, L03, L 05 , LI9
SECTION A -PA G E 30
IN-LINE
FUSE
1 2 0 5 2 6 4 1
EGR
SOLENOID
LB 4.L03 ONLY
Summary of Contents for ST 350 1988
Page 1: ...1988 LIGHT DUTY TRUCK WIRING DIAGRAM BOOKLET ST 350 88...
Page 2: ......
Page 18: ......
Page 20: ...V SECTION A PAGE 10...
Page 33: ......
Page 38: ...SECTION A PAGE 28...
Page 41: ......
Page 47: ...SECTION A PAGE 37...
Page 50: ......
Page 54: ......
Page 57: ...TRANSFER CASE SPEED SENSOR FOUR WHEEL DRIVE SECTION A PAGE 47...
Page 76: ......
Page 87: ...FUSE BLOCK START L B 4 V 6 L03 L05 L 1 9 V 8 SECTION B PAGE 13...
Page 89: ...SPLICE 33 FUSE BLOCK START 8 CYL LT9 N A 5 V 8 SECTION B PAGE 15...
Page 90: ...SECTION B PAGE 16...
Page 91: ...FORWARD REAR BATTERY BATTERY FUSE BLOCK START LL4 LH6 DIESEL SECTION B PAGE 17...
Page 100: ...GLOW PLUGS LL4 DIESEL SECTION B PAGE 26...
Page 101: ...PRODUCTION JUNCTION BLOCK GLOW PLUGS LH6 DIESEL SECTION B PAGE 27...
Page 104: ......
Page 124: ...43 8 YEL INSTRUMENT PANEL LAMPS TELLTALE SECTION B PAGE 50...
Page 125: ...ILLUM ILLUM ILLUM ILLUM ILLUM 43 8 YEL INSTRUMENT PANEL LAMPS GAGE SECTION B PAGE 51...
Page 128: ......
Page 131: ...IGNITION SWITCH IN D IC ATO R LA M PS TELLTALE S E C T IO NB PAGE5 7...
Page 133: ...8917693 IGNITION SWITCH INDICATOR LAMPS GAGE SECTION B PAGE 59...
Page 141: ...60 1 0 ORN BLK POWER DOOR LOCKS W ITH DELAY MODULE RPO AU 3 SECTION B PAGE 67...
Page 144: ...SECTION B PAGE 70...
Page 169: ......
Page 171: ..._ n n _ BATTERY FRONT FUSE BLOCK REAR START 6 CYL LL2 SECTION C PAGE 19...
Page 172: ......
Page 173: ...CONVENIENCE CENTER FRONT REAR FUSE BLOCK IGNITION 4 CYL SECTION C PAGE 21...
Page 177: ...FRONT REAR FUSE BLOCK IGNITION 6 CYL LB4 SECTION C PAGE 25...
Page 181: ......
Page 185: ...452 8 BLK 452 8 BLK TO ECM LN8 4 CYL ELECTRONIC CONTROL MODULE INPUTS SECTION C PAGE 33...
Page 187: ...TO ECM 120 1 0 TAN WHT 30 8 PNK LN8 4 CYL ELECTRONIC CONTROL MODULE OUTPUTS SECTION C PAGE 35...
Page 188: ...SECTION C PAGE 36...
Page 194: ...SECTION C PAGE 42...
Page 200: ...SECTION C PAGE 48...
Page 218: ......
Page 223: ...RADIO EQUIPMENT SECTION C PAGE 71...
Page 228: ...VANITY MIRROR RPO D64 SECTION C PAGE 76 12047781 141 8 BRN WHT H H VISOR VANITY MIRROR...
Page 242: ......
Page 248: ...SECTION D PAGE 6...
Page 263: ...TO PARK BRAKE WARNING SW l P CLUSTER CONN FUSE BLOCK START L25 V6 LE8 LT9 V8 SECTION D PAGE 21...
Page 269: ...CONVENIENCE CENTER l P CLUSTER CONN FUSE BLOCK IGNITION L05 L1 9 V 8 SECTION D PAGE 27...
Page 272: ...SPLICE 150 4 v J U U i FUEL SHUT OFF VALVE SEE PAGE GLOW PLUGS L L 4 DIESEL SECTION D PAGE 30...
Page 282: ...SECTION D PAGE 40...
Page 286: ......
Page 287: ...TO ECM ELECTRONIC CONTROL MODULE OUTPUTS L05 L19 V8 SECTION D PAGE 45...
Page 288: ...SECTION D PAGE 46...
Page 300: ...SECTION D PAGE 58...
Page 322: ...SECTION D PAGE 80...
Page 336: ...POWER DISTRIBUTION L 2 5 6 CYL BODY STYLE 4 2 SECTION E PAGE 2 FRONT FUSE BLOCK REAR...
Page 338: ...POWER DISTRIBUTION LT9 V 8 BODY STYLE 4 2 SECTION E PAGE 4 FUSE BLOCK REAR...
Page 339: ...3 2 BLK BATT CABLE FRONT FUSE BLOCK REAR POWER DISTRIBUTION L 0 5 V 8 SECTION E PAGE 5...
Page 349: ...WIPER WASHER SECTION E PAGE 15...
Page 351: ...pS A s L BATTERY FRONT REAR START IGNITIOIM LE8 V8 BODY S T Y L E 3 2 SECTION E PAGE 17...
Page 352: ...START IGNITION LT 9 V 8 BODY S T Y L E 4 2 SECTION E PAGE 18 FRONT REAR...
Page 356: ...SECTION E PAGE 22...
Page 363: ...FUEL SHUT OFF VALVE 12020274 GLOW PLUGS LL4 DIESEL SECTION E PAGE 29...
Page 365: ...TO ECM ELECTRONIC CONTROL M O D U LE IN P U T S L 0 5 V 8 SECTION E PAGE 31...
Page 367: ...TO ECM 439 8 PNK BLK ELECTRONIC CONTROL M O D U LE O U T P U T S L 0 5 V 8 SECTION E PAGE 33...
Page 374: ...SECTION E PAGE 40...
Page 386: ......
Page 387: ...l P CLUSTER CONN R H TAIL STOP 8 9 1 7 8 1 8 DIRECTIONAL LAMP HAZARD LAMPS SECTION F PAGE 9...
Page 389: ...R H TAIL STOP 8 9 1 7 8 1 8 DIRECTIONAL LAMP DIRECTIONAL LAMPS SECTION F PAGE 11...
Page 393: ...1 9 0 BLK l P JUNCTION BLOCK START 6 CYL SECTION F PAGE 15...
Page 396: ...ELECTRONIC CONTROL MODULE CONNECTORS TO STARTER IGNITION 6 CYL SECTION F PAGE 18...
Page 406: ...SECTION F PAGE 28...
Page 412: ...SECTION F PAGE 34...
Page 422: ......
Page 423: ...l P CLUSTER CONN INSTRUMENT PANEL LAMPS ELECTRONIC SECTION F PAGE 45...
Page 441: ......
Page 453: ......
Page 454: ...CHEVROLET I i...