[LPete]

Are you saying that the red wire from the relay goes to the two-wire plug on the alternator? It shouldn't. The power to the high-blower relay on most GM cars of that era came from a fuse connected to the output stud of the alternator. I'm *fairly* sure that should be the brown/orange wire. We really need a wiring diagram -- I couldn't find one online without paying.

Edit: OK, now I see where the brown/orange wire goes. The red should go to the output stud. The relay makes contact between the brown/orange and red to give hi blower. If the grey wire is power to the relay coil the brown wire should ground to turn the relay on. I think something's funny with your wiring to the compressor -- not sure why there would be a circuit breaker there.