Blower Motor Resistor: Testing and Inspection

BLOWER MOTOR CONTROLLER INSPECTION




Check controller for operation as follows.
- Using service wire, connect battery positive terminal to "1" terminal (1) of blower motor controller (6) and battery negative terminal to "2" terminal (2) of blower motor controller.
- Using bulb (3.4 W) (4) and service wire, connect battery positive terminal to "3" terminal (3) of blower motor controller as shown figure.
- Arrange 3 new 1.5 V batteries (5) in series (check that total voltage is 4.5 - 5.0 V) and connect its positive terminal to "3" terminal of blower motor controller and negative terminal to "2" terminal of blower motor controller. Then, check that bulb lights. If bulb does not light under the above conditions, replace blower motor controller.