It is a 1994 LS, a buddys car of mine. His other friend did a swap on it(LS to LS) and it worked good for 2 days and now he went around a courner and it popped. I replaced it and it keeps popping. I checked all the grounds, all the power wires, what could this be? I was thinking alternator.. any info is good info. OH by the way, its the main battery fuse.

 

Recheck grounds, check for shorts.

If you can't find it bust out a volt/ohm meter.

 

When does it pop?

If it pops right away-Dead short, look at the main cables that connect to the fuse box and/or battery