Heater Blower
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Heater Blower runs only at low unpluged the blower ran direct off battery and it ran on full speed
2 Replies
Popular Answer
torque wrenchon Jan 16, 2011
check the fan speed conrol switch to be sure the contacts are good for all speeds if not replace the switch. I f the switch tests got replace the fan speed resistor.
Brian Glastetteron Jan 16, 2011
I suspect the blower switch. The switch directs power through a stepped resistor, if the blower runs on high when auxillary power is applied, the blower is good. I have also seen the switch knob strip out. Look careful at the inside of the knob to see if it is turning the switch.
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