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James
James, Ford Technician
Category: Ford
Satisfied Customers: 3628
Experience:  Ford Senior Master Tech, Ford gas and diesel expert, ASE Certified
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I have a 2002 Ford F-150 that won't start. The wire going to

Customer Question

I have a 2002 Ford F-150 that won't start. The wire going to the solenoid has a constant 4.2 volts I can jump solenoid to start truck also odometer does not light up. When I use key to start truck entire dash goes out
Submitted: 1 year ago.
Category: Ford
Expert:  James replied 1 year ago.

Hello, it sounds like you have a completely dead battery bi would charge the battery before testing anything else. If the battery is bad you will need to replace it. Once you have 12v to test the system the vehicle will start. If you are still only getting 4.2v on the starter wire then you have a broken wire and will either need to find the break or overlay a new wire.

Customer: replied 1 year ago.
I also have a security code p1260 and the odometer doesn't eliminate
Expert:  James replied 1 year ago.

The P1260 is a theft code. Are both keys programmed to the vehicle?

Customer: replied 1 year ago.
I have tried both keys. Would that reduce the voltage
Expert:  James replied 1 year ago.

It shouldn't reduce voltage but a low battery can cause your same issues. Does jump starting the vehicle make a difference.

Customer: replied 1 year ago.
Jump starting makes no difference. I disconected the wiring harness from the fire wall and can start the truck with a power probe. There has to be a shorted component under the dash that is back feeding the solenoid with the 4.2 volts
Expert:  James replied 1 year ago.

What is the voltage of the battery?

Customer: replied 1 year ago.
12.2
Expert:  James replied 1 year ago.

Do you have a scan tool or a way to test for codes?

Expert:  James replied 1 year ago.

Hello, can I still offer you assistance?