Fuse repeatedly gets blown

1992 CHEVROLET CAPRICE
126,939,921 MILES • V6 • AUTOMATIC
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MSAHBK
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  • 1 POST
i require assistance to isolate an issue i am facing. In the fuse panel, fuse #17 repeatedly gets blown. I have changed it from 15 amp to 20 amp to 25 amp and now to 30 amp .
I am unable to identify where is this short circuit happening.

I am not sure if it is of relevance, but the 25 amp fuse blew just after i started the car. Another point here is that for starting the car, the steering is to be lowered from top position to lowest most position, else the ignition switch does not get engaged.
Jan 1, 2018 at 12:20 AM
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ASEMASTER6371
  • CERTIFIED EXPERT
  • 52,796 POSTS
Good morning.

By installing a higher rated fuse in the system, you may have compounded the issue and may have caused wire harness damage from overheating the wires.

when the fuse is blown, what function does not work?

does the car start and run?

Roy
Jan 1, 2018 at 4:20 AM
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PATENTED_REPAIR_PRO
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  • 1,853 POSTS
Remove that fuse and stick a ammeter into that empty fuse socket. The turn the key to run. The ammeter should not read more than 15 amp on the dc scale. Actually it should be much lower than 15 amp , below even 5 amp, but 15 amp will blow the fuse, so start disconnecting each item one at a time on that fuse's circuit until the ammeter drops safely below 15 amp, the find out why that item does not work.
I have included a diagram showing everything on that circuit starting with the light switch, instrument cluster, etc., all the way to diaganosis energy reserve module.
Or of you prefer, you could stick in a 15 amp automatic resetting circuit breaker into that fuse socket, turn the key to run and look to see what does not work. Although there may be somethings that may be difficult to see but most you can just look at the lights.
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Jan 1, 2018 at 6:30 AM
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