Question about 2005 Hummer H2

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Hummer headlight won't turn off

I have an 05 H2 and the headlights won't turn off. As soon as you turn on the ignition the headlights come on and the driving lights won't even come on. I have checked all relays and fuses and they are all good. I'm sure there has to be some sort of fail safe that keeps the headlights on. They will only turn off with the ignition the switch has no effect even if the vehicle is off. Thanks, TT

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  • treylee77 Feb 07, 2009

    I cleaned the sensor off and it is still not working correctly. The switch acts as if it isn't even there. The switch does not work at all but I had it tested and the switch is good. I was told what ever feeds the swich with power is not sending a power but going into a fail safe and making the headlights come on and stay on. Thanks,,TT

  • Anonymous Apr 06, 2009

    i drowned my h3 in some water last night.. now the headlights wont turn off... the water was up to the rockers, thats all.. this h3 is junk when it comes to 4wheelin.. gettin rid of it when I can..

  • Anonymous Mar 31, 2014

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I know gms have a light sentinal in the dash. when it says it's dark out, it will automaticaly turn your lights on. dose your hummer have one? if so, try cleaning it off.

Posted on Feb 07, 2009

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05 hummer will not start new ignition switch battery charged u can feel the relays getn juice but woulnt do nething but make a clickin sound ne suggestions


Mine had the same problem earlier this year. I tracked it down to the starter cables. They didn't feel loose, but has been working fine ever since I adjusted them. Just a thought

Mar 29, 2013 | 2003 Hummer H2

2 Answers

Headlights wont work and dash and parking lights come when ignition switch is turned on. sometimes jiggling wires works. what is the problem?


Check out related help links with solutions to troubleshoot these problem.
Click the link below directly:---
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---------- 2001 Chevrolet Tracker: Headlights and Dash lights Pulsating? http://whoisbyme.blogspot.in/2012/06/2001-chevrolet-tracker-headlights-and.html
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Working of Headlight switch?

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Both headlight bulbs blow together?
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http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

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http://technoanswers.blogspot.in/2012/02/hummers-headlights-flashes-while-start.html

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http://schematicsdiagram.blogspot.in/2012/02/using-non-afs-headlamp-assembly-for-afs.html

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These details will help.
Thanks.



Nov 22, 2012 | 1996 Pontiac Grand Am

1 Answer

I have an 05 H2 and the headlights won't turn off when the truck is OFF. I have full headlight control when the key is in the ignition & turned. I have checked all relays and fuses and they are...


Hmm, thats verry interesting, sounds like there is a short somewhere. You should check the switch, and all the wiring. I bet it's the switch though.

Aug 04, 2011 | 2005 Hummer H2

1 Answer

How to adjust headlights on hummer h2? need them to shine higher.


This can only be done with sophisticated equipment. You must take it to a specialty shop where they have the equipment. It requires computer controlled lasers and levels.

Oct 03, 2010 | 2004 Hummer H2

1 Answer

My heater doesnt seem to be working for my 05 H2 Hummer. I checked all possible fuses, what would be my next steps?


Check and make sure coolant level is up to proper mark would be one of the first things I'd have to ask. Is the blower motor working at all?

Dec 23, 2009 | 2005 Hummer H2

1 Answer

Hummer H2 engine won't turn over, key won't


Dead Battery? Bad starter motor?

Try pushing on the brake and making sure its all the way in park.

Turn the steering wheel back an forth a little to remove the key.

None of those work, Call triple A, find a shop.

Jun 07, 2009 | 2007 Hummer H2 SUT

1 Answer

I just got my 2007 hummer h2 sut, but I don't know how to turn on


The fog lights run by default during the day in the "auto" position. To activate the headlights and the fog lights you need modify the jumper position in the fuse box for the lights. "see fuse box diagram"

Apr 05, 2009 | 2007 Hummer H2 SUT

1 Answer

Oil pressure


Your oil pressure sending unit is bad. Replace it and it should be fine agan.

Feb 06, 2009 | 2005 Hummer H2

1 Answer

Headlight replacement


Open the hood, Turn the twist lock sleeve the surrounds the wiring harness end and pull out bulb holder. Pull out old bulb, press new bulb tab into slot, replace unit back into light housing, turn twist lock sleeve to secure to housing.

Dont touch the new bulb with your bare fingers.

Skin oils can heat up on the bulb and cause it to fail.

Jan 17, 2009 | 2004 Hummer H2

2 Answers

H2 Hummer


Today 11-12-08 my 2003 H2 Hummer would not start. Checked battery it ischarged. Cables tight. Tried to start with portable booster pak. No go. Tridto jump start with my wife's Suburban. Still no go.
When I turn the switch I hear a single click and that is it. No engine turning over. While trying to start with key the headlights go out. Out of ideas, Will take to Chevy garage in am. Will post solution.

Aug 23, 2008 | 2003 Hummer H2

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