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Aug 28, 2006 | 01:45 PM

padrinho

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wants to start

ignition is in the off position but truck is trying to start 77 f-150 4.9 300 v6

Aug 28, 2006 | 04:27 PM

subford

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From: Easton,Ks

Quote:

Originally Posted by padrinho

ignition is in the off position but truck is trying to start 77 f-150 4.9 300 v6

Change the starter solenoid.

Aug 29, 2006 | 12:30 PM

1975Ford

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Test the starter, starter relay.

there is 5 identical post,
https://www.ford-trucks.com/forums/5...-to-start.html
https://www.ford-trucks.com/forums/5...-to-start.html
https://www.ford-trucks.com/forums/5...l-problem.html
https://www.ford-trucks.com/forums/5...7-f-150-a.html

Aug 30, 2006 | 08:28 AM

padrinho

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wants to start

Quote:

Originally Posted by subford

Change the starter solenoid.

changed the starter solenoid worked for 1 week then same problem

Aug 30, 2006 | 09:40 AM

subford

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From: Easton,Ks

Quote:

Originally Posted by padrinho

changed the starter solenoid worked for 1 week then same problem

A low battery or hard to turn engine will draw more Amps than normal and can weld the solenoid closed.
Pull the wire off the "S" terminal of the solenoid and if it still cranks the solenoid is welded closed and you will have to replace it.
Not all solenoid are made of the same quality, make sure you get a good one from Ford or NAPA best.
If it does not crank with the wire off the solenoid then look at the Ignition switch.