Alternator Issue

[Pstyckiewicz]

I have been looking at diffrent things on my M1152A1 and noticed that the voltage meter stays in the yellow. In addition I unhook the battery the truck shuts off. It has the 200amp alternator. Is there anything I should check? Or bad connection?. And is this something that I could rebuild?
Thanks,

 

[springer1981]

I have been looking at diffrent things on my M1152A1 and noticed that the voltage meter stays in the yellow. In addition I unhook the battery the truck shuts off. It has the 200amp alternator. Is there anything I should check? Or bad connection?. And is this something that I could rebuild?
Thanks,

I just replaced my regulator after troubleshooting the alternator. I posted about it as well as posted the Neihoff Alternator Troubleshooting PDF file. I highly recommend you test it based on the PDF, it will help you id the issue. https://steelsoldiers.com/threads/my-new-1992-m998-avenger.184818/post-2505017

 

[Milcommoguy]

I have been looking at diffrent things on my M1152A1 and noticed that the voltage meter stays in the yellow. In addition I unhook the battery the truck shuts off. It has the 200amp alternator. Is there anything I should check? Or bad connection?. And is this something that I could rebuild?
Thanks,

This is going to get crazy... What is the test to disconnect the battery when running?

Might be looking for a new start box if you keep that up.

Perpetual motion Humv ? CAMO

 

[DREDnot]

Came here to agree with CAMO... disconnecting the battery of a running vehicle is not a test for anything. It can complicate a diagnosis by randomly frying something new.

 

[MarkM]

Never disconnect the battery/batteries while the engine is running. Fastest way I know to damage something (voltage spikes).

A multimeter will alow you to test the charging system without negative effects. The gauges are are always off to some degree.

Mark

 

[Pstyckiewicz]

Won’t be disconnecting the battery again while running. I’ll take a look at Springers post and try to figure out what might be wrong. Thanks for the great info.