Blowing main fuse on '88

[invader_star]

I'll try and make this brief..
I recently rebuilt my Blue Festiva "Blue Steal" and everything has been running great since then. However recently, I started having what appeared to be a grounding issue. My lights would flicker a little bit, and the engine would stutter with the lights going up and down. It had been doing this for a little while. I took apart the engine-bay fuse panel and cleaned up a lot of corrosion that was present. After I put everything back together, the car ran excellent afterwards. No flashing, no stutter. Then, all of a sudden my car radio went out, and came back on. This happened repeatedly in the same drive, and when I turned the car off and checked it, the main fuse had blown. ACC/ON didn't do anything. I can replace the fuse, and it starts up normally, but after awhile it will once again blow the fuse. The car will remain running after the blown fuse as well. The only thing I can think of is my alternator is malfunctioning, or my battery is messed up.. I'm so lost!

If you need any clarification to better offer an opinion, let me know! Thanks in advance guys

[kellen302]

if you cleaned everything, you might've exposed something that's now grounding out and blowing your fuse

[invader_star]

Well the fuse panel itself isn't shorting out to the chassis anywhere. I wrapped the entire panel in a plastic bag and drove around for a bit and the 30A main blew again. It only blows after driving it for awhile. I did some searching and most of you guys agree that a 30-40-30 fuse array works best, so I applied it to my car. I don't blow my fuse anymore, so that's nice. I'm still curious as to why it started blowing the fuse when it worked with a 30A for so long, but this thread is "solved", other issues aside.

[FestYboy]

that still not good... you should be able to run a 25A main without issues... the fact that the 30A is blowing means that SOMETHING is still drawing too much power...