How do I replace the bulbs in the fog Lights that are on the roof of my 2008 Hummer H3

Switch wire may have come off of the back of switch or possibly a bad switch. Hope this helps

The engine will shut down to protect itself,check the oil level and see whether the car has oil.The light comes on if the oil level is low or the oil pump is not pumping any oil.I replaced my engine hummer h3 two weeks ago due to a malfunctioning oil pump.Check if you oil pump is not malfunctioning.Good luck hope you have not damaged anything further like the bearings due to lack of oil.

Are the brake lights the ONLY lights that do not work? Does the third (high mount) brake light work when you apply the brake pedal?
The Hummer H3 is basically a Chevy Trailblazer in Hummer clothing.. so the first place to look is the brake light fuse. If it is good, then check for power at the brake light switch mounted near the top of the brake pedal pivot area. Also be sure that the bulbs themselves are OK.

There could be loose wire at the bulb socket ,A break in a wire, Or a bad ground, Or a short, Best way to have it solve is to take it into a auto eletric shop to be check out,

Change the bulbs only

my h3 hummer runing light on trailer do not work i have no power at the plug the turn & stop lights work

clean abs sensors at each wheel.