Battery current drain
Thread Starter
Burning Brakes
Joined: Jan 2005
Posts: 1,216
Likes: 1
From: westminster California
Battery current drain
How much current should my c5 electrical system drain from the battery for the first 30 minutes or so after the ignition and all accesories and lights are turned off. I was reading 1.87 amps then it cuts back. Is this correct?
Melting Slicks
Joined: Oct 2007
Posts: 2,383
Likes: 13
From: Kinston North Carolina
Good read!!!!!!
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Tech Contributor
Joined: Jan 2007
Posts: 19,359
Likes: 1,127
From: Dyer, IN
Seems a little high. It should be 20ma or less from what Bill Curlee has posted in his Electrical stickey.. Have you tried pulling fuses and relays after the BCM goes into sleep mode (usually about 15 minutes)? Do you have any aftermarket stuff that might be adding a drain? ie GPS or IPOD or such that is wired before the ignition switch?
Tech Contributor
Joined: Jan 2007
Posts: 19,359
Likes: 1,127
From: Dyer, IN
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
When you first connect the amp meter you may see 8 amps. Thats because the head light motors can jog and reapply tension to the down position. That only last for a quick second. Then it falls to around 2 amps and quickly drops to less than 1 amp. It takes mine around 7-8 mins to drop down to sleep mode .02 amps.. Thats what GM designed. Some models may see a slight bit more or less but,,,that the average. If your seeing a lot more,,,something isn't dropping off line like it should.
There are tons of post on this very topic. Ive answered at least 20 and listed 5-6 things to check.
BC
There are tons of post on this very topic. Ive answered at least 20 and listed 5-6 things to check.
BC
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