Alternator Question

[mtinsman]

Hey guys,
I was wondering when I had my alternators rebuilt can I have both of them rebuilt with isolated grounds?

Thanks,
Matt

 

[dmc-4359]

That's the way they come from the factory. Arguably, only one needs to be isolated but in order to make them identical it did not hurt to have both with isolated grounding.

 

[319]

Best to do both, that way they can be swapped if needed.

 

[mtinsman]

Ok. I bought 2 new alternators off of ebay and the ad said they were for a M1008. I got them put them on and the fuseable link that goes from the battery to the firewall fried. what could have happened????

 

[Warthog]

Ok. I bought 2 new alternators off of ebay and the ad said they were for a M1008. I got them put them on and the fuseable link that goes from the battery to the firewall fried. what could have happened????

They where either hooked up wrong or the alts do not have the isolated ground.

This was covered just last week. Do an advanced search for "alternator" in the CUCV forum. Many, many posts. Here are a few.

http://www.steelsoldiers.com/cucv/4...side-alt-connection.html?highlight=alternator

http://www.steelsoldiers.com/cucv/4...ain-isolated-ground.html?highlight=alternator

http://www.steelsoldiers.com/cucv/4...ator-wiring-diagram.html?highlight=alternator

Do you have an Ohm meter? Do you know how it works? (some people don't)

Check the ohms between the case and the ground lug. It should be an open circuit.

 

[mtinsman]

Ok I will do that I have an Ohm meter I will check it. I researched the hook up of both alternators and I hooked them both up correctly my guess is that I bought two alternators with no isolated ground.

 

[mtinsman]

Ok I went home and did an Ohm check on the passenger side alternator and it read between 000.2 and 000.3

 

[Warthog]

Ok I went home and did an Ohm check on the passenger side alternator and it read between 000.2 and 000.3

Was this a new/rebuilt or used alt?

The ground terminal is not isolated from the case. You have a direct short from the battery to ground. That is why the fusable link fried.

Open up the case and see if the fiber washer was installed on the inside.

Just last week a fellow member had his alternators rebuilt and the shop "forgot" to install the fiber washer in the inside ground terminal

http://www.steelsoldiers.com/cucv/49353-m1009-passenger-side-alt-connection.html

 

[mtinsman]

The alternators are both brand new I got them off ebay the ad said they were for a M1008.

I just ordered the alternator from napa WIL 90014277 should be in tomorrow.