GEN 2 Isolated Ground Check

[aembry1009]

I apologize in advance if this has been previously covered, but I have read countless topics and not found my answer..

I am simply trying to verify that the isolated ground is properly set up before putting power back to everything. Working on M1009 GEN 2 circuit.

Both alternators are installed into the truck. Why do I have reservations? The quality of the work done by POs is the reason and the alternators look to be fresh rebuilds.

I have measured resistance from alternator studs to case and determine that the circuit is closed, but I don't know if that is a proper way to check that the ground is isolated.

 

[doghead]

There should be no continuity between the ground stud and the case.

 

[Tow4]

I apologize in advance if this has been previously covered, but I have read countless topics and not found my answer..

I am simply trying to verify that the isolated ground is properly set up before putting power back to everything. Working on M1009 GEN 2 circuit.

Both alternators are installed into the truck. Why do I have reservations? The quality of the work done by POs is the reason and the alternators look to be fresh rebuilds.

I have measured resistance from alternator studs to case and determine that the circuit is closed, but I don't know if that is a proper way to check that the ground is isolated.

Isolated ground means exactly that. The ground terminal on the alternator should be isolated from the alternator case. There is a link to my alternator rebuild thread in my signature. There are pictures that will help you understand how everything goes together.

 

[aembry1009]

Thank you all for the confirmation. Better safe than sorry! Sorting this jewel one system at a time. Many thanks to the wonderful contributors to this board, as it's already proven helpful to me in addressing the many needs of this truck. I've been a lurker for a while now.