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Security lock? Engine will not turn over?

Tiny
KEVIN BERGEMANN
  • MEMBER
  • 2002 CHEVROLET IMPALA
  • 1,300,000 MILES
Car won’t turn over. I replaced the ignition lock switch. Went through the relearn process no luck. Next replaced the BCM did the relearn process again and no turn over. Checked the started it’s fine. The battery is good also. What should I do next?
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Friday, April 28th, 2023 AT 5:45 AM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 POSTS
When you try to crank the engine over does the security light flash? If not, I would swap out the crank relay and try to crank the engine over in neutral. Here is a guide to help you check for power and the starter wiring diagrams so you can see how the system works:

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

This guide may help as well:

https://www.2carpros.com/articles/starter-not-working-repair

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Saturday, April 29th, 2023 AT 11:43 AM

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