Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1990LUMINA APV V6-191 3.1LREPAIR AND DIAGNOSISLOCATIONSCONNECTOR LOCATIONSPICTORIAL VIEWSTOP VIEW
1990 Chevrolet Lumina APV V6-191 3.1L
Top View
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Top View
Engine Wire Routing (Top View):
1 = HARD-SHELL GROMMET (RH ENGINE BULKHEAD).
2 = ALTERNATOR (GENERATOR).
3 = WINDSHIELD WIPER MOTOR.
4 = HIGH BLOWER RELAY.
5 = BLOWER RESISTOR ASSEMBLY.
6 = BLOWER MOTOR.
7 = IDLE AIR CONTROL (IAC) SENSOR.
8 = THROTTLE POSITION SENSOR.
9 = ENGINE TEMPERATURE SENSOR.
10 = DISTRIBUTOR CONNECTOR.
11 = BRAKE PRESSURE SWITCH.
12 = HARD-SHELL GROMMET (LH ENGINE BULKHEAD).
13 = I/P WIRING HARNESS.
14 = CRUISE CONTROL SERVO.
15 = W/S, W/W SOLVENT RESERVOIR PUMPS (FRT & REAR WIPERS).
16 = I/P, ENGINE AND FRT LAMP HARNESS INTERCONNECT.
17 = FUEL PUMP PRIME CONNECTOR.
18 = TRANSAXLE SELECTOR SWITCH (NEUTRAL START) CONNECTOR.
19 = TRANSMISSION CONVERTER CLUTCH (TCC) SWITCH.
20 = ENGINE WIRING HARNESS GROUNDS.
21 = STARTER SOLENOID.
22 = ENGINE COOLING FAN.
23 = OIL PRESSURE SENS0R.
24 = ENGINE HARNESS GROUND.
25 = A/C COMPRESSOR (HI & LO PRESSURE).
26 = A/C COMPRESSOR CLUTCH.
27 = A/C SCHRADER.
28 = ELECTRONIC VACUUM REGULATOR (EGR) VALVE.
29 = A/C COMPRESSOR CONTROL RELAY.
30 = ENGINE COOLING FAN RELAY.
31 = FUEL PUMP RELAY.
32 = HARNESS TO ELECTRONIC SPARK CONTROL (KNOCK SENSOR), O2 SENSOR, VEHICLE SPEED, AND WATER TEMPERATURE SWITCH.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.