We're installing a '93 6BT/518 combo in our Ramcharger, complete with the '93 engine wiring harness, and in the FSM is indicates the PCM is connected to part of the alternator's wiring, but we cannot figure out why.
There are 4 main terminals coming off the alternator: (A) 6BK/WT - engine ground, (B) A142 18DB auto shutdown relay, (C) - PCM (generator field???), and (D) alternator feed to battery.
Ground and main hot are no sweat, but what does the PCM feed do and while I'm at it what does the auto-shutdown relay do?
Can anyone educate us on what/why the PCM is in the alternator's wiring harness...and does it need to remain in the loop?
We had a 3-wire GM alternator in the RC before and now we're trying to figure out how to make the 6BT alternator play nice with the RC's wiring.
Any input is greatly appreciated.
- Sam
There are 4 main terminals coming off the alternator: (A) 6BK/WT - engine ground, (B) A142 18DB auto shutdown relay, (C) - PCM (generator field???), and (D) alternator feed to battery.
Ground and main hot are no sweat, but what does the PCM feed do and while I'm at it what does the auto-shutdown relay do?
Can anyone educate us on what/why the PCM is in the alternator's wiring harness...and does it need to remain in the loop?
We had a 3-wire GM alternator in the RC before and now we're trying to figure out how to make the 6BT alternator play nice with the RC's wiring.
Any input is greatly appreciated.
- Sam