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Discussion Starter #1
I just bought a 91 GM with ATC(not the EATC).The blower motor is on a high speed all the time-even with the selector switch in 'off'. The high speed relay must work because I can hear a small increase in speed when I move the fan speed control to 'auto' or 'high'. Is there a separate blower motor speed module or is this built into the switch? Any ideas?

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