Keep blowing 80 amp
 

So I have a 97 civic and I put a 1.6 vtec out of a del sol to replace a blown engine. Got it up and running and its all fine. I put about 20 miles in about 6 short test trips and its all good. no leaks.. I go out yesterday and its dead find the 80 amp fuse blown. SO I went and bought 2 and put the first one in and it blows. get my test light out and if I jump it from one side to the other its lighting up the test light. I checked wiring all over the car. no burns or anything grounded that I can see. anyone have an idea?

Re: Keep blowing 80 amp
 

Your test light isn't effective in that situation. There are too many other power consumers on that fuse circuit that will cause a small test light to illuminate. But kudos for having one and trying to use it.


There are 2 main reasons the big main fuse ever blows---without other damage:

1) Connecting the battery backwards (jump start???), or
2) Short in the alternator circuit (the one big wire), either the wire or the alternator itself.








There are 2 big wires bolted to the fusebox, one from the battery (black?) and the other from the alternator (white or white/red).

Unbolt the alt charge lead from the fusebox. That should stop the fuse from blowing.
Then trace out why there is a short on that circuit.