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Awesome info retiredwarhorses. I ended up putting the box that was on the working Humvee back on with the plugs working and its still good. Thought it was toast earlier because I didn't have any glow plugs connected. Im guessing something is stuck in the bad controller box as i have 12 volts on...

Thanks for the replies. I purchased my boxes from the hummerpartsguy. He says they are directly purchased from AM General and not NOS. Yes power was removed. The boxes are suppose to be the latest version available. They are just as pictured above.. So going through and comparing the voltages I...

This sucks..... Ok so here is the scenario. Hope its not to much information but more is better right.. I have three M998 vehicles. They all ran when purchased. One would crank after running the starter ran say 5-10 seconds and once cranked it smoked a little until it warmed up (lets call it...