OK, don't break it!

I believe there may be a stuck relay involved here - but I don't have the electrical diagram for that car. Possibly someone else has it?

The heater is still unplugged. I've plugged it back in & nothing happened. I didn't want to chance it turning on by it'* self in the middle of the night or while I'm at work & coming out to a dead battery, so I just leave it unplugged. I may have to take it to a shop soon. It'* supposed to snow next week end & it'* too cold to drive w/o a heater. Not to mention the defroster ain't working either. Brrrrrrrrrrr!

Page 1B-31 in 90 FSM shows both a blower relay (between a/c dryer and fan motor on firewall, is one closest to the dryer and the fan module (below relay - two connectors going into the ductwork. if you do not have the electronic blower module (resistor array imstead), then it is probably the relay.

Thanks!