I get in the car to leave the battery is always drained?

Tiny
CAROLYN REINSCHMIEDT
  • MEMBER
  • 1992 CADILLAC DEVILLE
  • 4.9L
  • V8
  • 2WD
  • AUTOMATIC
  • 150,000 MILES
I have replaced the starter and have a new battery. Still when I get in the car to leave the battery is always drained. When trying to jump the battery it will sometimes take an hour. I just keep rearranging cables for possibly better connection and when I turn over the engine to see if it starts my new starter just clicks. I have no idea what finally got the battery jumped. Is there anything I might be overlooking that could cause this to happen like fuses or something? Thank you for your Expertise in advance. Carol
Friday, June 30th, 2023 AT 10:20 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,256 POSTS
The system has a draw, the first thing I like to do is remove the A/C compressor control relay because when they stick it leaves the compressor engaged and draws the battery down. here is a guide that can help and the location of the relay so you can remove it to see if the problem goes away:

https://www.2carpros.com/articles/car-battery-dead-overnight

Check out the images (below). Please let us know what happens.
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Saturday, July 1st, 2023 AT 1:29 PM

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