Ford F150
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Joined: Oct 2003
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Ford F150
I am working on a Ford F 150 4X4 351 . The truck starts good but will not turnoff when key is turned off. I have replaced ignition switch did not help. Checked wiring for breaks none found. The coil has power and sparks when ignition switch is off. I also noticed when turning off switch the interior lights brighten up, engine runs on. This is not dieseling.
Any one have some hints ?
Any one have some hints ?
Senior User
Joined: Apr 2003
Posts: 426
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From: Knoxville, TN
Well, I'd guess that the wire to the coil is shorted somehow to B+. Its entirely possible that the ignition switch itself is at fault?
I must assume if it is an F-150 (and a 351) it isn't a 67-72? Does it have electronic ignition?
Did this problem just start after some other work?
I must assume if it is an F-150 (and a 351) it isn't a 67-72? Does it have electronic ignition?
Did this problem just start after some other work?
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