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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

blown pcm fuse

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Old Oct 16, 2005 | 01:41 PM
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blown pcm fuse

i have a 96 e250 that just suddenly died so i messed with it a bit and found the pcm fuse under the hood was blown does anyone know what would cause this i havent tried to replace it yet i wanted to get some input before i get into it thanks Bill
 
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Old Oct 16, 2005 | 04:18 PM
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Well, that fuse blew for the same reason any fuse blows, too much current overheating the wire. You'll have to check the wiring for a ground short or connection problem...
 
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Old Oct 16, 2005 | 05:19 PM
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Best case a wiring short to GND, worse case, something internal to the PCM shorted to GND.
 
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Old Oct 17, 2005 | 09:56 AM
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can anyone tell me where the cpm is located thanks
 
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Old Oct 17, 2005 | 05:10 PM
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I assume "cpm" is meant to be PCM, or the vehicle's engine computer?

It's in the firewall, on the drivers side, down under the brake master cylinder. You'll see 3 or so big wire connectors going into the firewall. The one closest to the fender is the computer's plug. The computer sits in a little cubby in the firewall.
 
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