Replaced Alternator - glow plugs won't stop cycling

[82gmc]

Truck = 82 6.2 diesel


I just replaced my Alternator......started the truck, let it warm up while I was in the house.....started down the road and the glow plugs start cycling and will not stop.

It's dark out right now, so I haven't had a chance to see under the hood.

Any ideas? did they give me the wrong alternator???????

Thank you for your help

BLEW THE BELTS

[sctrailrider]

Might check that the temp plug didn't get knocked off, front of the head under the Alt...

[More Power]

The cylindrical 1982-84 glow plug controller receives a signal from the alternator that is used in-part to control cycles when the engine is running. So, it's possible the new alternator is the cause.

Or, it might be a good time to upgrade to the 1985-93 controller...

[phantom309]

the alternator you put on needs a diode put in it to stop back feeding the glow plugs,.
Nick