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Something you hardly ever see mentioned in the numerous postings abour hard starting HMMWVs is people checking the COLD ADVANCE SWITCH and it's associated SOLENOID in the injector pump. Two critical components in cold weather starts. The cold advance switch is on the rear end of the right...

The non-hydraulic HMMWV winches have 2 high current cables running to them. Typically both cables run to the starter. Nothing relies on the frame as a return path for current. Because of the way the truck is constructed everything in the HMMWV either has a ground connection in the wiring harness...

There is no frame ground tie point in the supplemental harness but it wouldn't hurt to have one. Nothing else in the truck grounds to the frame.

multimeter on a resistance scale

Conventional thinking is that current is the flow of electrons from negative to positive. The purpose of the grounding kit is to eliminate potential differences ideally there shouldn't be any current flowing in the ground system.

Casasenita, the purpose of the grounding kit is to make sure there are no potential (voltage) differences between any of the components in the electrical system and the body of the truck so any point you can pick up will generally work. You always want to use "star" washers because they will...

I did this modification years ago and have never seen a lot of the problems mentioned here. I used a very flexible 8 gauge wire to build the harness. I wouldn't use solid wire as vibration will break it in time. One of the weakest points in the HMMWV body grounding is the ground behind the...