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Keep blowing PCM-B fuse - 2003 GMC Sierra

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1997 Ford F-150 Reg Cab, V-6 Keep blowing fuse #24,Power Box under hood,30 amp, PCM power,


Try unplugging the power control module. If the fuse still blows its wiring if it doesn't I would guess the power control module is bad.

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2003 mercury mountaineer keep blow fuse 41 and will not trune over


F1.41 15 PCM power diode, PCM power relay, Vapor management valve,
Heated oxygen sensors (HO2S), Electr. Vacuum Regulator (EVR)
solenoid valve, Evaporative emission (EVAP) canister vent valve
(9F945) one of these above mentioned components is shorted to ground causing that fuse to blow , Check the O2 sensor wiring to see if it is melted on exhaust pipe or manifold . Go youtube an check out how to find a short in an automotive electrical circuit !
These
Finding active short

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2008 X. Why does PCM fuse #23 keep blowing?


Sounds like the is a wire shorting to earth

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My pcm fuse blows every time i turn on the switch but if a remove my fuel pump relay switch the pcm fuse does not blow 03 alvalanche


fuel pump is bad,your relay will be also from trying to start pump.there is an outside chance your relay is bad,easier to change that first

Mar 28, 2014 | 1998 Chevrolet S-10 Pickup

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It is possible that the fuel relay is faulty and causing excessive current through the pcm fuse which is blowing because of the excessive current draw to the relay.

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Check the Powerbox for a group of Relays and try replacing the PCM Relay.

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1 Answer

2002 PT Ignition start fuse blowing


PCM?? No they are wrong I think, keep looking at every wire fuse 30 supplies power to, you will need buy the factory wiring diagrams.

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1 Answer

2000 Saturn blowing pcm fuse


There are two PCM 10amp fuses that power the computer. The computer provides grounds to some 20 or 30 different circuits. Any one of those circuits could blow one or both of the 10amp fuses.
I would probably unplug the PCM and see if the fuses still blow. If not, you will need to pin test each circuit from the PCM to find the short. And you'll need a shop manual to get the wiring diagrams for those circuits.

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