1990 Pontiac Transport

I recently purchased the 90' transport se, the problem I have partially repaired as a result of LMH's comments.
Now the blower motor (High Speed) Relay did partially resolve the no-high-speed-issue. I'm assuming at this point that the speed switch is bad as sometimes when i push the high speed selector, the blower doesn't go to high-speed. YET - sometimes when i gently touch the lower speed button, the blower goes to High-Speed.
ANY IDEAS ? :screwy:

I believe the switch was your initial problem and should be replaced before it burns out your hi speed relay again,,,the switch seems to be shorting and that probably caused the relay to go bad initially