Battery is not being recharged
08-03-2017, 03:54 PM
#2
Burning Brakes
:
09-20-2017, 04:47 AM
#3
Racer
Join Date: Nov 2007
Location: S. E., VA USA
Posts: 438
Likes: 0
Received 0 Likes
on
0 Posts
My 90 C4 battery drain syndrome
Not sure how my post ended up in this thread. ????
My car will discharge it's battery within 2 weeks. I have measured drain at 17 ma. Doesn't add up. But, I have noticed that my oil/AC fans will come on occasionally and run even when car is off. My thinking is that a minor drop in battery voltage is leading to circuitry confusion, especially in CCU. A rebuilt CCU at $1000 is a bit much for a WAG at problem, so I keep car on trickle charger.
My car will discharge it's battery within 2 weeks. I have measured drain at 17 ma. Doesn't add up. But, I have noticed that my oil/AC fans will come on occasionally and run even when car is off. My thinking is that a minor drop in battery voltage is leading to circuitry confusion, especially in CCU. A rebuilt CCU at $1000 is a bit much for a WAG at problem, so I keep car on trickle charger.
Last edited by dlpalumbo; 09-20-2017 at 04:51 AM. Reason: Confusion
09-20-2017, 02:04 PM
#4
Thanks Tore B. I've gone through the procedure again. Battery fully charged. The drain seems to be steady at 50-60 milliamps although at one point it got up to .3 amps. Pulling the fuse 1 got it down to .02 so there may be still a problem there with the CCU. I couldn't duplicate that and the draw seems to be back down to .06 amps. As I mentioned I had the transistor replaced on the CCU. I will get the new battery checked and probably wait until I receive your T OBD kit for further evaluation. Door switches seem ok. If there was a faulty fan resistor would this show up as parasitic drain?
