hi everyone, theres something weird going on my car its an 88 turbo, i refresh the engine 3-4 months ago(new acl bearings,piston rings all seals etc...) now heres the proble since the rebuild i have been having problems with my battery its a cheap one i bought in a tire shop-band ameritron.....anyways the problem is that when the car is off the battery its drained but when on its fine.i have been dealing with that like 2-3 months i drive the car and when im off i disconect the battery terminals and then reconnect em back, so it havent been that bad since i only use the car to work or close places near my home,well now comes the weird part some weeks ago i noticed that the cable that goes on top of the alt the one with a nut{i think its a + cable} was glowing red and throwing sparks when i rev it up although the wire harness havent catch fire yet. im really worried about it cause i already know whats a burning harness and its not funny,a friend of mine told me to put a thicker cable from that terminal to the battery but i really domt know if its going to work.i prefer to ask you guys cause i dont trust my car to any mechanic that isnt myself but the electric area isnt my best so please someone help mi......thanks