heater motor won't work 1993 toyota truck


Asked by lokthor May 11, 2013 at 04:02 PM about the 1993 Toyota Pickup 2 Dr Deluxe 4WD Extended Cab SB

Question type: Maintenance & Repair

heater moto does not turn on,makes a single click sound when I turn on switch

1 Answer


Unplug the blower motor and, using a 12 volt DC test light ,see that the blower motor is getting power. The test light should light up in each of the positions of the fan speed switch. Becoming brighter as higher speeds on the switch are selected. If you have no power at the blower motor unplug the resistor block. Test for power there. Only one terminal will have power depending on the position of the fan speed switch. If you have power at all terminals, individually, but no power at the blower, resistor block is bad. If you have power at blower motor, blower motor is bad. If you have no power anywhere, switch on dash is bad. This is assuming you checked the fuses and they are all good. HTH. -Jim

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