Mechanics

FUEL SYSTEM WIRING SHORT

1988 Chevrolet Truck • 2WD Automatic •

I have a 1988 c3500 quad cab dually 454 dual tanks. Using tank selector switch blows 10amp ecm2 fuse and I loose fuel pump. Vehicle has dead short and blows ecm2 two fuse each time its replaced. Driver side fuel pump has been replaced twice. Any suggestions
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Rlamaster
February 9, 2011.



You'll have to probe the positive side of the fuel pump circuit for a short. Also check the connectors for bent pins inside.

Ernest Clark
Feb 25, 2011.