what fuse can i pull to reset the computer? ive pulled fuse 20 (GEM, PCM, audio, somethin else) in the box that is in the cab. it did not clear the codes like it does when you unplug the battery. i think i fixed the problem that was throwing a code and id like to reset the computer.

 

Not sure on your model - but under the dash it should only be a 5amp fuse.

That little book that came with truck in the glove box decribes it better. The layout.

The one in the PDB under the hood is a 20amp on mine.

 

the one i pulled was 5 amps. but theres a few fuses that are 5 amps and list PCM and/or GEM in the description. do i need to go under the hood?

 

No - actually there linked to each other - GEM isn't the correct fuse as far as I know. I have an 01 book , but not here with me. That books your friend. 5/16 0r 8mm will work on the battery. Unhook the NEG -touch it to the POS, reconnect right away is quickest KAM reset ,if under the hood.

Need that book..You can download the book as-well.

 

Try fuse #2 in the PDC. It powers the PCM full time. Removing this one should clear the keep alive memory (KAM) and re-boot all the tables.

 

Wrong box. F2 in the PDB powers the PCM Power relay's NO contacts.

The correct answer is F2 in the CJB (underdash fuse panel) for a 2002 F-series and Expedition. It is a 5A fuse that powers only PCM pin 55 (PCM KAM). Just pull the fuse and go take a break for awhile.

Steve

 

Steve, 'm not wrong.
Yes the F2 will do it but so will the #2.

 

alright, thanks guys. just went and pulled F2 in the CJB. next time i go out ill put it back in.

 

'fraid so...

F2 in the PDB has no connection to the PCM's KAM pin. Consult your schematic carefully.

2 in the CJB feeds the PCM power relay as described. Pulling it has the exact same effect on KAM as does pulling the PCM Power Relay....none.

Steve