LO/MED Speed

Slower Blower Motor speeds are accomplished by limiting the current flow through the Rear Heater Blower Motor. This is accomplished by placing resistance in the current path for the Motor. When the MEDIUM setting is selected, a current path is provided through Terminal A of the Rear heater Resistor Pack RED (1925) wire and through the Resistor connected to Terminal B of the Rear heater Resistor Pack and on out through to the Rear Heater Blower Motor This Circuit puts one Resistor in the current path. When an even lower speed is desired, the Blower Switch is placed in the LOW position. This provides a current path Through the Switch to Terminal C of the Rear Heater Resistor Pack DK BLU) (1926) wire. The Circuit is then completed through the resistor connected to Terminal C and the resistor connected to Terminal B. This places two Resistors in the Motor current path, thus reducing Motor current even further. Power is completely removed from the motor if the Switch is placed in the OFF position.

Heated Engine Coolant is provided to the Rear Heater Core when the Heater ,A/C Control Valve Solenoid is energized. This solenoid is powered by a second set of contacts in the Rear Heater Switch. Battery Voltage from ORN (1923) wire is provided through the switch positions High, Medium, and Low Battery Voltage is provided, in these positions, to GRY/BLK (1596) wire, C219 Terminal through the Convenience Center to C100 terminal D1 and finally to the A Terminal of the Heater and A/C Control Valve Solenoid. The Solenoid is grounded at Terminal B by BLK (850) wire and will be energized. Power is not provided to the Solenoid in the OFF position.