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post #1 of 2 (permalink) Old 04-18-09, 03:05 PM Thread Starter
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confused Why won't my 91 F-150 crank over?

My 91-F150 won't crank over. When I turn the key it doesn't even click - only a faint hum. The battery tested good. I replaced the clamps to the battery terminals, checked the ground, and replaced the solenoid - still no go.

I jumped the solenoid with a screwdriver and it turned over, but didn't fire, so I'm sure the starter is ok. I'm puzzled. Any thoughts?

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post #2 of 2 (permalink) Old 04-18-09, 07:37 PM
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Re: Why won't my 91 F-150 crank over?

If bypassing the solenoid cranks the vehicle, you most likely have a faulty new solenoid, bad connection, or it's not getting the signal from the ign. switch. It could also be a problem with the neutral safety switch.
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