1997 Ford F150 starter and battery

1997 FORD F-150
175,000 MILES • V8 • 4WD • AUTOMATIC
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JACK1141
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My truck starter tries to engage while engine is running sometimes...???
Also should my engine go off if I disconnect neg, bat. cable while truck is running?
Mar 30, 2009 at 6:59 PM
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RASMATAZ
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Test the starter relay and ignition switch. If you disconnect the battery the engine will continue to run if the alternator producing its correct output.
Mar 30, 2009 at 7:04 PM
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JACK1141
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so what is the problem ?? my engine dies as soon as I remove neg. cable. test light shows alternator is charging battery

I already replaced ignition switch? didn"t help

what is a starter relay? same as starter mounted solenoid??

Thanks
Mar 31, 2009 at 8:05 AM
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RASMATAZ
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Test the starter relay could be sticking internally causing the battery and starter contact to short out and transfering unwanted power to the starter. 4.6L the relay is located at no.2 in right rear of engine compartment see below


https://images.2carpros.com/forum/automotive_pictures/12900_relay1_4.jpg

5.4L is on no.4 see below also in right rear of engine compartment.


https://images.2carpros.com/forum/automotive_pictures/12900_relay2_2.jpg

Mar 31, 2009 at 2:43 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.