2002 impala battery drain


Butters16
04-03-2015, 03:58 PM
Car has a drain that kills battery over night. Fuse for cluster/BCM in driver side fuse panel gets rid of drain. Didn't know if there is a common issue for the car to look for . Thanks

la1
04-04-2015, 08:59 PM
None that i have heard of, so the fuse is for the BCM ?

Butters16
04-06-2015, 11:43 AM
In owners manual it says cluster/ BCM for that fuse

Blue Bowtie
04-06-2015, 08:11 PM
Is this the 10A fuse? If so, what is the current draw in standby mode? If if is over 50 mA there may be a problem. However, initial current after shut-down and for about five minutes afterward can be higher. It should drop to 35-50 mA after that.

Butters16
04-07-2015, 07:32 AM
Yes it is the 10 amp fuse, it draws 1.64 amps all the time and kills battery in a few hours(overnite)

Butters16
04-07-2015, 11:29 AM
I checked all the normal stuff < glove box , truck and hood lights to make sure they are going off. Unplugged the truck latch and made sure the interior lights cycled out(also that the cluster lights shut down.

aleekat
04-07-2015, 01:04 PM
Bad diode in the alternator can cause battery drain but still provide proper charging voltage during testing.

Butters16
04-08-2015, 11:23 AM
Not the alternator unwired it still had drain

SierraK1500
07-22-2015, 10:25 AM
This may sound dumb but start unplugging items in that circuit. If the drain stops watching a VOM for indication then the part you unplugged is at fault. Process of elimination.

John

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