need help with alternator

[pvcces]

Hi, Jerry.

I checked the circuitry several times, and I came to the conclusion that GM designed the system to require revving of the engine to get the generator and heating system started. The same circuitry shuts off the starter, so I refer to the relay that controls all of this as the "safety relay".

While sometimes the generator sensing relay is cranky; when it's not, the system works just fine.

I took it that they didn't want the heating/AC system turning on until the engine was put on fast idle, and they didn't want the starter getting turned on after the generator was running.

A benefit to this setup was that if the charging system should fail, the HVAC system couldn't deplete the batteries in a short time, especially at night.

I haven't looked at the later models' manuals to see if they did something different.

For what it's worth.

Tom Caffrey