1. Getting Started - Prepare for the repair
2. Open the Hood - How to pop the hood and prop it open
3. Remove Cover - Locate engine fuse box and remove cover
4. Locate Bad Fuse - Find the fuse that is tied to the bad component
5. Remove Fuse - Take out the fuse in question and assess if blown
6. Replace Cover - Secure the cover and test component
7. More Info. - Additional information on engine fuses
The video above shows how to check for blown fuses in the engine bay of your 2009 Hummer H3 and where the fuse box diagram is located. If your map light, stereo, turn signals, heated seats, headlights or other electronic components suddenly stop working, chances are you have a fuse that has blown out. Fuses should always be the first thing you check if your H3 is experiencing electrical difficulties because they are relatively easy to check and inexpensive to change. 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 in question.
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.
Hans Angermeier has produced over 100,000 videos showing drivers how to fix things on their cars. He has broad expertise on basic repair procedures covering the majority of cars on the road.
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