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Copy that. That is what I was thinking as well. I am already OCD about watching gauges, so I'll catch it quickly if it is faulty. Thought about trying it in the driveway but I doubt it would get warm enough to tell even at high idle.

Cool, at least it's not a major deal if it's unplugged. I appreciate the response. I think I will plug mine back in as well to see what happens. I assume this was also used in the deep fording system to disengage the fan as to prevent the blades from breaking as they hit the water.

What is this? Mine is unplugged and I can’t find any info on it. New to these so take it easy on me.

Time for a new regulator then.

That was my initial thought as well. Grabbed a couple of yellow tops, cleaned the battery compartment and all connections thoroughly. I removed the cap on the voltage regulator and got 33 volts upon cranking the engine and the in cab gauge immediately hit the red. I know the regulator is...

1990 M998. Was cruising right along and started to smell rotten eggs, pulled over to discover the batteries hissing and discharging steam. Batteries date 9-21. Note: they were not secured by straps or proper mounts by previous owner so my question is flopping around, bad alternator, voltage...