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 DIAGNOSISSTARTING AND CHARGINGSTARTING SYSTEMSTARTER MOTORTESTING AND INSPECTION
1990 Chevrolet Lumina APV V6-191 3.1L
Starter Motor: Testing and Inspection
1990 Chevrolet Lumina APV V6-191 3.1LSECTION Testing and Inspection
Fig. 11 Diagnosis Chart (Part 1 of 3):
Fig. 11 Diagnosis Chart (Part 2 of 3):
Fig. 11 Diagnosis Chart (Part 3 of 3):
Fig. 12 Connections For Checking Free Speed Of Motor:
When diagnosing Delco-Remy starter motors, refer to Fig. 11.
This test is performed during bench testing. With the circuit connected as shown in Fig. 12, use a tachometer to measure armature revolutions per minute. Failure of the motor to perform to specifications may be due to light or dry bearings, or high resistance connections. Starting motors do not require lubrication except during overhaul. At this time a couple drops of light oil may be applied to bearings.
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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.