Quick 200 amp regulator question.

[Coug]

So I have a keyed battery disconnect. Sometimes when I start the HMMWV (m1123) the generator shows like it's about to start charging, it goes slightly into the green between glow plug pulses, but then drops back to yellow and stays there. If I turn off the engine, tap on the regulator a little bit, then restart, it will charge normally. As long as I don't turn off the ground disconnect it will continue to work properly, but if I disconnect the ground I have to tap in the regulator before it will charge.

Before I start tearing things apart, is it even possible to service the regulator for the 200 amp generator, or is my only option replacing it?

Or is there possibly something else I might be overlooking?

 

[juanprado]

I would start with the basics. Check every cable on the alt and make sure connections are good at all ends. Reg can be bad but a loose or bad cable internally can be suspect as you Tweak it.

My understanding is that is a replacement item. i have not seen anything on one disassembled. I believe there are 2 different niehoff regulators for that unit depending on when built. Not sure if interchangeable.

 

[Coug]

I've checked over the cables, and can't find any issues with any of them.

Added question, does the smart start or control box or whatever it is also give a signal to the regulator to start charging, or is the generator/regulator completely independent of the start control box?