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08-29-2006, 11:51 PM
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Hummer Professional
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Join Date: Mar 2003
Location: N.CENTRAL OHIO
Posts: 474
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fog lites on hi and low
On the GM trucks we soldier in some diodes to have all 6 lights on w/ the hi beams.
Any one here checked or done it on the 3?
I get some time I'm going to try and get the fogs it to work.
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07 White H3 Adventure w/ some black stuff
04.5 GMC D/A CC SLT LB EFI LIVE tuned
98 ZR-2 Blazer
Ex H2&3 owner
My hiking boots and canoe paddle have more miles than most 'offroad' vehicles, over 350 in last year.
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08-30-2006, 12:43 AM
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Hummer Guru
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Join Date: Jul 2005
Location: Idaho
Posts: 4,744
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Re: fog lites on hi and low
Yes, it can be done, but could take some time to figure out. Both headlamps and Fog are BCM controlled.
BCM controls a relay to power the fogs, BCM controls the power circuit to the headlamps, and also controls the HI/LO beam relay to supply ground for the HI or LO beam.
Heading out of town, so I don't have time to really look right now.
Probably all you will need are some relays, maybe a few diodes, but you should be able to isolate the circuits with relays.
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Black Sheep Hummer Squadron
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08-30-2006, 01:58 AM
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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: fog lites on hi and low
If you value your warrentee dont do it...
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08-30-2006, 02:13 AM
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Hummer Guru
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Join Date: Jan 2004
Posts: 7,060
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Re: fog lites on hi and low
I'd add some lights before messing with the factory harness.
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TAIL RATED!
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08-30-2006, 03:19 AM
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Hummer Professional
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Join Date: Mar 2003
Location: N.CENTRAL OHIO
Posts: 474
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Re: fog lites on hi and low
Quote:
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Originally Posted by wpage
If you value your warrentee dont do it...
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WHY?
on the GM trucks and SUVs I've done it to, it only takes 5 seconds or so to switch the relays back to stock.
Wife just said the hi beams aren't very bright.
__________________
07 White H3 Adventure w/ some black stuff
04.5 GMC D/A CC SLT LB EFI LIVE tuned
98 ZR-2 Blazer
Ex H2&3 owner
My hiking boots and canoe paddle have more miles than most 'offroad' vehicles, over 350 in last year.
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08-30-2006, 04:47 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: fog lites on hi and low
why do they make the fogs turn of with highbeams anyways?
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08-30-2006, 06:59 AM
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Hummer Expert
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Join Date: May 2006
Posts: 616
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Re: fog lites on hi and low
If it's all controled by the BCM you may be able to get the dealer to change it through software.
May be worth asking anyway.
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Black 06 H3, Adventure Package, Monsoon Sound, Sunroof, Chrome and Tow Package
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