I have a pretty bad parasitic draw. I really dont know where its comming from. I think its from my system. If I leave my truck without starting it for a day its dead. How can I check my system to see if it is the cause.

unhook your system for a few days and see if it still does it....

i cant do that...i dont have enough time to leave my truck sit for a day.

I think what Im going to do is put a test light on the negative terminal and cable and then disconnect the cable and start pulling fuses...if i pull a fuse and the light goes out then I know that is my problem.

u cant live without your system for a few days? just unhook the system and if you dont have trouble with it anymore then its obviously the system.

that wont do anything. the truck has to sit...otherwise I wont know if its draining or not. I wont know if its being drained if the alternator is charging it. get what im saying?

yeah now i understand, how about have you tested the battery? the battery might be bad and not wanting to hold a charge. if not you can have it tested at most auto parts stores for free. only takes a few minutes. otherwise now im kinda stumped