View Single Post
Old 08-15-2009, 11:08 PM   #13
born again
Senior Member
born again is a name known to allborn again is a name known to allborn again is a name known to allborn again is a name known to allborn again is a name known to allborn again is a name known to all
 
Join Date: Oct 2003
Location: Toronto, Ontario, Canada
Posts: 1,529
 

2000 L-Series 2.2L Sedan
2000 L-Series 2.2L Wagon
Default Re: My battery is dead overnight

Low voltage can cause some unusual sounds to come from under the dash. Some relays may not pull in and may chatter. I concur your battery may be long in the tooth, but may not be the direct source of the problem. Be sure to check the side terminal battery connectors for corrosion. They must be removed and cleaned. The side terminals on the battery tend to leak acid into the the connectors and cables, causing them to corrode and rot away. I found I had to cut off the fancy plastic covers on the connectors and replace the bolts.

Based on the data posted, it is also possible you have a problem in the wiring in the circuit you identified. While there have been many BCM failures reported on this forum, I can't recall one being associated with excess power draw.
born again is offline   Reply With Quote