i replaced battery but still goes dead overnight
why my battery goes dead at night and the amp light on 1995 Ford E-150
you either have a short or the regulator in the alternator is stuck on. need to have checked at a shop.
Go to youtube and search, how to check a battery drain! You have a parasitic load on the battery while parked. Something is staying on. Watch youtube video, then if you feel you need help, see a mechanic. Might be a paint brush stuck in the cig. lighter socket!
I had the same problem and ground out that the computer was shot. It was turning on power to the compressor and running the battery down.