Quote Originally Posted by Darkice View Post
Check your grounds. And check the both ends of both battery cables. Might be lose or corroded.
+1 NEVER underestimate the power of a crummy ground.My buddy had that problem when he wired his subs. The battery is also linked to the car body, so you may want to check that too. At least on my car, that is directly under the battery.

Hope you find out whats wrong eventually. For all I know you already fixed it, haha. Didn't read the 2nd page.