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01-09-2007, 05:10 AM
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Hummer Veteran
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Join Date: Jul 2005
Location: San Jose, Ca
Posts: 170
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Major Electrical problems
Sometimes it seems like my H3 has a dead battery. There are times when the remote key doesnt work and I have to use the blade key to get in. Then there are times when the remote key works but when i go to start the car nothing happens. No ignition or anything. Like the battery is completly dead. It starts working after about 5 atempts. Then for some reason my clock keeps resetting after every key cycle. Then there will be times when Im driving and I'll hear a pop coming from my speakers, like the electrical was turned off and then back on real quick.
The only mod electricaly that I have done is electronic trailer brakes. But I'v had that installed for a while now.
Anyone else have or heard of this problem??
__________________
Mercedes-benz Technician
06 H3 Black, 5-Speed manual, Black Rock Crawl wheels, flowmaster 40-series with 2 turndowns, Lux and Off-road package.
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01-09-2007, 08:19 AM
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Hummer Authority
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Join Date: Mar 2006
Location: Chicago, IL
Posts: 1,086
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Re: Major Electrical problems
i had a similar thing happen when i was installing my radio. I was messing around with the bcm, had to use some of the wires so i had taken the connector off. I guess i hadnt snapped it in place rite. When i tried to start the car nothing. I poked around for a while and figured it out. If you messed with the bcm (the ting behind the passenger kick panel), its worth a try, but might not be it.
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01-09-2007, 01:05 PM
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Hummer Expert
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Join Date: May 2006
Posts: 616
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Re: Major Electrical problems
Did you open the fuse/relay box under the hood when you did the trailer brakes?
If so the two connectors inside may not have been connected properly.
__________________
Black 06 H3, Adventure Package, Monsoon Sound, Sunroof, Chrome and Tow Package
Last edited by deserth3 : 01-09-2007 at 01:09 PM.
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01-09-2007, 03:47 PM
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Hummer Professional
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Join Date: Sep 2006
Location: Memphis
Posts: 349
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Re: Major Electrical problems
You've got an intermitant OPEN circuit somewhere.. Either a loose wire in the fuse box or even a loose battery cable...
Rob
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01-09-2007, 04:37 PM
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Hummer Guru
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Join Date: Jul 2006
Location: Stouts Creek
Posts: 4,192
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Re: Major Electrical problems
Check for trouble where you last worked and go back to mains for opens/poor conectivity.
__________________
"For God so loved the world he gave his only son that whoever believe in him would not perish but have everlasting life. "
(John 3:16)
2006 H3 Slate Blue,Header,Jacked,CAI,Toyo35's,HHO.
Priors...
Explorer
Commander
71 Vette
You Name it!
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01-09-2007, 04:44 PM
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Hummer Expert
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Join Date: Jan 2007
Location: Southern Cali
Posts: 652
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Re: Major Electrical problems
Check all your grounds too.
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01-09-2007, 05:33 PM
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Hummer Expert
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Join Date: May 2006
Location: Johnstown, PA.
Posts: 553
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Re: Major Electrical problems
My experience with this type of problem was a very finicky battery cable on the Ford Explorer I traded for the H3. Despite the + battery cable being tightened as much as possible, I still had the exact same problem you describe. I would have to pop the hood and wiggle the cable. And then it would start. Just a thought
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01-09-2007, 05:50 PM
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Hummer Expert
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Join Date: Jan 2007
Location: Southern Cali
Posts: 652
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Re: Major Electrical problems
Same with my old truck. The combo of mud in the summer and snow in the winter caused lots of corrosion and some I couldn't see in the fibers of the cable. Whenever I had no power or reset, it was the fault of the ground not having a significant connection to complete the circuit upon start up. I was subject to constant cleaning and adjusting of cables. White vinegar works wonders. This of course would be the easiest solution, or best case scenario. Might be worth a checking before you look deeper into the electrical system.
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