Okay. There are 17 major wiring diagrams for the H2 but the first 2 or 3 covers everything from the main buss through starting and more. He should be able to pin it down there. Has he changed the electronic ignition switch?? They are a common problem and many times intermittent. That's where I would start if it were me. If you know anything about wiring I can send you the diagrams if you want them.
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Jonahs
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