inline fuse next to battery keeps blowing
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Junior Member
Joined: Nov 2009
Posts: 9
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Car: 89 Iroc Z Convertible
Engine: 5.7 TPI
Transmission: T-5 Manual
inline fuse next to battery keeps blowing
The fuse that is next to the battery blows when I cycle my key on. I know its related to my fuel pump, fuel relay and oil sending switch. I have replaced all three of them. I did the oil sending switch last night, and the fuse didn't blow at all. I pulled the car out of the garage and parked it. I went to move it today and bingo, the fuse blows. Can anyone help me?
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From: Kettering, ohio
Car: Restored 88 GTA
Engine: 5.0
Transmission: Auto
Axle/Gears: Posi
Re: inline fuse next to battery keeps blowing
That fuse should be the one powering the maf sensor, maf burn off relay, ecm and fuel pump relay. Look for deteriorated wiring under those relays, drivers side, mounted on the firewall above the brake master cylinder.
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From: Cary, North Carolina
Car: 1992 RS
Engine: Carbed 350
Transmission: 700R4
Axle/Gears: 3.42 posi
Re: inline fuse next to battery keeps blowing
What amperage is the fuse you are installing? If memory serves me, it's supposed to be a 20 amp fuse.
Thread Starter
Junior Member
Joined: Nov 2009
Posts: 9
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Car: 89 Iroc Z Convertible
Engine: 5.7 TPI
Transmission: T-5 Manual
Re: inline fuse next to battery keeps blowing
I've been using 20s. I even tried a 25 once to see if it made a difference.
I don't see any broken wires. Unless I have to unplug the entire wire harness and go wire by wire.
I don't see any broken wires. Unless I have to unplug the entire wire harness and go wire by wire.
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iTrader: (14)
Joined: Jan 2008
Posts: 210
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From: Kettering, ohio
Car: Restored 88 GTA
Engine: 5.0
Transmission: Auto
Axle/Gears: Posi
Re: inline fuse next to battery keeps blowing
Maybe I should clarify "deteriorated wires" The hot wire should be all of the orange ones. Look for something melted together. If not then process of elimination. Unplug the maf and burn off relays first, test results.
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raymondandretti
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Sep 27, 2015 06:43 PM





