1995 GMC S15 No Start Except Bump

GMC
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PIGEON_1969
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  • 1 POST
My 95 GMC S15 pickup won't start. Battery is less than 2 yrs and has good voltage reading, starter is less than 1 yr and have had it tested, alternator should be okay because lights and stereo come on, truck will bump start but won't jump start. This problem came on gradually over about 6 months, occasionally it wouldn't start until turning key 4 or 5 times, now it won't start without popping clutch. I think it's an ignition system problem?
Mar 12, 2006 at 6:21 AM
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2CARPRO BOB
  • ✓Experienced Mechanic
  • 45 POSTS
You probably have a bad ignition switch. Here is a guide to help you test the yellow wire from the switch when in the crank position. If no power is present the switch is bad.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Here is the starter wiring diagrams so you can see how the system works. Check out the images (below). Let us know how it goes
Image (Click to enlarge)
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Mar 14, 2006 at 12:54 PM
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Suggested Repair

Test the yellow wire from the ignition switch with a test light while the key is in the crank position. If no power is present, replace the ignition switch. Use the starter wiring diagram to confirm the circuit.

Conversation Summary

A 1995 GMC S15 pickup will bump start but will not start with the key, despite a battery with good voltage and a recently tested starter. The no-start developed gradually over about six months. The expert suspects a bad ignition switch and recommends checking the yellow wire from the switch for power in the crank position.

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