I'm not getting enough power to blower motor or heating controls
We took the center part of the dash with the heating controls out and put one from the exact same
truck and it wouldn't work. We switched blower motors too low power. Checked fuses, relays. The
stater switch isn't checking enough power either to see if its bad. Stumped
did you apply 12 V to the replacement unit to make sure it's not a dud? take a look at the connector going to this and with your multi-meter look for voltages at probably the red wire and ground on green or black- will tell you if the unit is getting power.
Blower motors speed is controlled through a resistor. Check the voltage to the blower motor with the switch on high speed - it should be 12 volts.
accessory wire at battery may need cleaned or fuseable link if equiped with may have blown,battery area
I appreciate everyone's feedback it's was that resistor, thanks
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