The blower motor circuit employs the following components:
| • | The blower resistor assembly |
| - | The A/C and rear defogger control assembly |
Battery voltage applies to the mode selector when the ignition switch
is in the RUN position. The mode selector energizes the blower motor relay
when you make any selection except OFF. The blower motor relay sends battery
voltage to the blower motor. The blower motor ground controls the speed of
the blower motor. When the blower switch is set to 1, the blower resistor
limits the voltage to the blower motor. The resistor slows the motor down.
When the blower switch is set to 2 or 3, the resistance decreases
in order allow more voltage to the blower motor. When the blower switch is
set to 4 the following events occur:
| • | The blower switch bypasses the blower resistor. |
| • | The blower switch allows full battery voltage at the blower motor. |
The blower then runs at high speed.
