94 ford f150 5.0 fuse 9 (pcm) and pcm relay popping

Luis Pratts

Asked by Dec 17, 2014 at 12:59 PM about the 1994 Ford F-150 XLT 4WD LB

Question type: Maintenance & Repair

I have a 94 ford f150 with the 5.0 in it and it
keeps popping the pcm fuse underhood
and and burn out the relay then stalls out
and wont start unless replaced and it has a
new computer also replaced the
transmission connector that the wires were
stripped on new iac valve new tps

3 Answers


The PCM is an electronic device very susceptible to overload, even a small one. The blown fuse and burning out of the relay would seem to indicate a short or excessive voltage being applied through the circuit. You'll need a wiring diagram unique to your vehicle and specifications for output voltage/ground/ testing procedures.

Best Answer
Luis Pratts

Pcm was burnt on the inside

Luis Pratts

Tha ks for thwe not helpful advise thank you for telling me exactly what i knew

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