Battery drain.

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  #1  
Old 03-28-06, 08:28 AM
carbonfiber's Avatar
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Unhappy Battery drain.

I have a 2003 Yukon Denali that has some sort of electrical problem that causes the battery to rapidly drain. If I park the vehicle on Friday and leave it, it won't start on Sunday morning. I just purchased a new battery and have had the problem reoccur. I took the battery back to the store where it tested good and they also tested my alternator which tested good. So I guess I have something continuously drawing power. How can I measure the power being used while the vehicle is off using a standard multimeter? Is there any way to quickly isolate the source of this power drain? Thanks in advance for the info.
 
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Old 03-28-06, 08:39 AM
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Originally Posted by carbonfiber
I have a 2003 Yukon Denali that has some sort of electrical problem that causes the battery to rapidly drain. If I park the vehicle on Friday and leave it, it won't start on Sunday morning. I just purchased a new battery and have had the problem reoccur. I took the battery back to the store where it tested good and they also tested my alternator which tested good. So I guess I have something continuously drawing power. How can I measure the power being used while the vehicle is off using a standard multimeter? Is there any way to quickly isolate the source of this power drain? Thanks in advance for the info.

Pull fuses on fuse boxes ( there should be one under hood another inside by driver's door ) one by one see if there's a tiny spark when putting fuse back on, usually this means voltage going thru fuse contacts at the time , if you can have somebody to check batt with multimeter for any changes as you pull fuses too that'd help.
Not Intended as Professional Advice.
 
  #3  
Old 03-28-06, 10:14 AM
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At night, check the car for strange, obscured lights such as a glove box light burning with the door shut, or an under the hood light weakly illuminating the ground under the engine. these are sneaky voltage sappers and easy to miss.
 
  #4  
Old 03-31-06, 09:23 PM
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I agree with the above post....since it is a Denali, check the mirrors....since they have those nice little lights that turn on when you pull the mirrors down....they have drained my battery twice but i fixed that problem.
 
  #5  
Old 04-01-06, 07:55 AM
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Check your automatic seat adjusters, if applicable. Sometimes they just stick and other times something is too close to them.
 
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