Blown fuse

Asked by Sidney Jul 31, 2016 at 12:05 PM about the 2004 GMC Sierra 1500 2 Dr SLE Standard Cab SB

Question type: Maintenance & Repair

My 2004 gmc serria with a v-6 keeps
blowing ign fuse b 40amp what could be
causing the problem

1 Answer
2,925

Chris answered 6 years ago

Hello Sidney, a blown fuse is usually caused by an over current situation in a particular circuit, in your case the ignition circuit. If you get a service manual, which i recommend, you will find where the wires run. You need to trace wires in the circuit to make sure there are no shorts to ground (where wire insulation is damaged and wire is touching bare metal). Hope this helps.

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