Hummer H2 battery draining during 48 hrs when parked.

Tiny
SVEIN STEINMOEN
  • MEMBER
  • 2006 HUMMER H2
  • 6.0L
  • V8
  • 4WD
  • AUTOMATIC
Battery drains over 48 hrs. When not in use. Brand new battery and original brand new alternator. Purchased because it was believed to be the problem. It's not. Can't solve problem. Thank you very much for your advice!

Best regards
Svein Steinmoen
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Thursday, October 22nd, 2015 AT 3:27 PM

7 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
It sounds like you have a constant draw on the battery. Follow these directions and let me know what you find.

http://www.2carpros.com/articles/car-battery-dead-overnight
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Thursday, October 22nd, 2015 AT 6:30 PM
Tiny
SVEIN STEINMOEN
  • MEMBER
2CARPROS.

Thank you very much for your step by step guide to solve the electrical problems with my Hummer H2, model 2006. I will now have my mechanic duly follow your detailed instruction.
When the problem is solved I will return with information.

Best regards
Svein Steinmoen
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Friday, October 23rd, 2015 AT 6:50 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Glad to help.

Joe
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Tuesday, October 27th, 2015 AT 5:55 PM
Tiny
SVEIN STEINMOEN
  • MEMBER
Thank you very much for your advice. My mechanic disconnected the radio. He believe this was the most likely culprit. I have used the Hummer every day since, but still don't know what will happen if I don't use it for a couple of days.
I have seen a double battery pack advertised for H2. Would that be something I should consider?

Best regards and thanks again!
Svein Steinmoen
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Thursday, October 29th, 2015 AT 7:47 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
If there is a draw, it will take longer, but it will still kill the battery after time. Since he disconnected the battery, if he rechecks for a draw, it should be gone if the radio is the problem.
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Thursday, October 29th, 2015 AT 6:08 PM
Tiny
SVEIN STEINMOEN
  • MEMBER
Hello 2carpros.
Very well. I will follow up with my mechanic, Thank you for good advice and your time!

Best regards
Svein Steinmoen
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Friday, October 30th, 2015 AT 7:07 AM
Tiny
SVEIN STEINMOEN
  • MEMBER
Thanks to 2carpros for advice. My problem with constant battery draining in my Hummer H2 model 2006 is now solved and I thought by sharing I might help others. My mechanic finally discovered that the fault was in the ignition lock on the steering column. He discovered it by chance when he bumped into it while looking for the fault elsewhere in the interior. The red light for the battery came on. A new ignition switch was bought and installed, and all is well now. Cheers - Svein Steinmoen
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Tuesday, November 24th, 2015 AT 7:22 AM

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