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Re: why is my 1995 sts blowing 20 amp fuses for the fuel...
Try to relase the fule pump conector and use new fuse then turn switch on if its blow the fuse again thats mean there is short in the wire harness or in the fule pump relay
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You have a short to ground ! Finding The Source Of Electrical Shorts In Your Car Which fuse is blowing ? # 10 a 20 amp in the under hood fuse box ? Check the fuel pump relay , that could be the problem .
You can find location of fuel pump relay here . http://www.bbbind.com/free_tsb.html Enter vehicle info. Year , make , model and engine size . Under system click on electrical distribution , then under subsystem click on junction block ! Then click the search button , then on the first blue link . The first diagram is of the under hood fuse / relay box . Try another relay , they can short internally .
In the under hood fuse box ! Fuse # 12 it's a 20 amp fuse . There is also fuel pump relay . Located in the same under hood fuse / relay box . #57 relay . The relay is computer controlled ! If the fuse is good you may want to watch this video on testing GM fuel pump electrical circuit . GM Fuel Pump Relay Testing
Seems to me you have a short to ground what you can do is unplug the fuel pump connector then replace the fuse to see if it still blows if it does not then you need to replace the fuel pump and sender if it does blow then you will need to trce the wire back to the fuse panel to see where it is shorted ....
i would check wire harness for bare wire but first i would look under that massive fuse box under hood, i kept blowing air cond relay and i traced it back to corroded connection on that fuse. not saying this is it and i hope it is that simple for you. other than that research exactly what the ecm-1 CONTROLS and search,test,grounds those systems. If i can come across any other symptoms i will forward them to you.
This normally happens due to short in the wirings.Or if someone has connected a stereo or some other electrical contrivance to the wiring harness (bundle), either under the dash or under the hood.To confirm this unplug the fuel pump wiring connections and insert new fuse.Then start the car and see,if still the fuse blows then its a short in wiring.But if the fuse does not blows then its faulty fuel pump relay or faulty fuel pump itself.So first replace the fuel pump relay and see,if the fuel still blows then its faulty fuel pump.But if the fuse not blowing then relay was the faulty part.The fuel pump relay located on the fuse box under the hood.---------This troubleshooting tips will help you locate the fault and solve it.-------Thanks.Helpmech.
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