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If your convenience lights, turn signals, seat warmers, stereo, headlights or other electronic components suddenly stop working, chances are you have a fuse that has blown out. The video above shows how to check and change blown fuses in the engine bay of your 2008 Hummer H3 in addition to where the fuse box diagram is located. Fuses should always be the first thing you check if your H3 is experiencing electrical difficulties because they are relatively easy and inexpensive to change yourself. The more electronics your H3 has, the more fuses it has. Some Hummers have multiple fuse boxes in the engine bay, so be sure to find the fuse(s) in question. Some components may have multiple fuses, so make sure you check all of the fuses that are linked to the component that is no longer working properly.
If you need to replace a blown fuse in your H3, make sure you replace it with one that has the same amperage as the blown fuse. If checking and replacing the fuse for the component in question doesn't work, we recommend seeking assistance from a trusted professional mechanic. They should be able to figure out if the component needs to be replaced or if there is a short or some other problem with your H3.
Burnt out brake lights increase your chance of getting rear ended - check and change yours today2008 Hummer H3 3.7L 5 Cyl.
Because you have to start somewhere2008 Hummer H3 3.7L 5 Cyl.
Don't send mixed signals - if your turn signal doesn't blink, or blinks rapidly, you likely have a burnt out bulb2008 Hummer H3 3.7L 5 Cyl.
The burnt out tail light: classic reason for a cop to pull you over - change yours now2008 Hummer H3 3.7L 5 Cyl.
White light when you back up - yup, they burn out and you can replace them with bright LEDs2008 Hummer H3 3.7L 5 Cyl.
DRLs are on more than your headlights. They burn out faster and should be replaced regularly2008 Hummer H3 3.7L 5 Cyl.