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Truck won't turn over

Tiny
LEWS
  • MEMBER
  • 1998 FORD F-150
  • 17,500 MILES
I have a 98 F150 4.6 engine that won't turn over. I've replaced the starter, the alternator, the starter relay switch. The battery's good. The lights and power windows and all that works. It just won't start. What else could it be?
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Sunday, June 24th, 2012 AT 10:17 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 43,110 POSTS
This sounds like you have a neutral safety switch that is bad but to be sure let's run a simple test to confirm the failure. Here are some guides to help you get started

https://www.2carpros.com/articles/how-a-neutral-safety-switch-works

and

https://www.2carpros.com/articles/car-cranks-but-wont-start

and

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

Here is a wiring diagram for the starter so we can see where it losses power. (below)

Please run some tests and get back to us.

Cheers, Ken
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Monday, May 31st, 2021 AT 11:14 AM

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