If you have an older model HMMWV, then chances are a lot of your electrical issues are due to grounding. It’s possible that you may have excessive corrosion where both metal contact causing a bad ground and all sorts of other electrical issues.
Therefore, the first thing that you should do to your new HMMWV is to add a ground wire kit to the eliminate any potential problems or future problems that may arise.
This heavy-duty grounding wire kit creates the ultimate ground that likely is lacking in your HMMWV
If you were having glow plug light issues, other headlights, marker lights, tail light issues p, then this maybe the fix for you. You should trouble shoot your specific scenario before purchasing this kit, but can’t hurt to upgrade your ground!
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