truck will bump start but won't jump start?

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 2:21 PM
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2CARPRO BOB
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  • 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
Mar 14, 2006 at 8:54 PM
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