Question about 1997 Buick LeSabre

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97-Buick LeSabre Psycho-blower

I found #30 wire at the blower relay(wire to motor) a little cooked.Replaced relay, now Hi-speed works, as just b4 complete failure, but with key off or on! Indicator lights for push-buttons seem to be a little dim. All other speeds do not operate. Lo,Med-lo,Med-hi, & HI-switch is OK, Old-style resistor-coils in top of air-plenum are OK. Blower is OK. I can't put my hands(eyes) on a wiring schematic for this. Did they do a common/grd switching thing in the wiring? I see the wire bundle from the switch heading over to the driver's side but can't follow it. What do you guys think. Thanx, Bill

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Sounds like a bad ground. with the blower on, measure the voltage between ground on the battery and ground on the blower. it should be less than 0.1v. if more, repair the ground. if ok, it may be corrosion at the fusebox or the HVAC module its self

Posted on May 28, 2010

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