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Showing results for tags 'rear heat'.
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Hey all ! Just signed up, but I'm coming over from gmc4x4.com. That forum has pretty much died out, and I need some pretty urgent help. Rear heat ! Fan doesn't spin. Doesn't get voltage at the fan. I have done the following, but I am willing to double check things too: That red wire under the dash. Complete, charged and seems to be ok. I really don't understand this fix, so I'd be willing to talk about it some more. Replaced rear resistor with the new updated one. Millivolts on those wires - nothing else. Fuses checked and appear to be ok. I have the auto-thermostat model with rear and fore temperature settings and "Auto" fan speeds. When I move the front HVAC control, it will disable the rear (Unless it's in AUX and the rear comes to life) The vent flapper doesn't appear to move either. It's like the entire rear unit has just gone to sleep. Voltage applied directly to the motor will spin it. Motor and windings appear ok and test out ok. Does anyone have any ideas ?
