Voltage is supplied to the heater and the air conditioning (A/C) controller by fuse 9. Power to the blower motor is supplied through the mode selector switch in the following positions:

Splice S215 splits the power source between the blower motor resistor and the blower switch. When the mode selector switch is in one of the powered positions, power will always be present at cavity B of the blower motor resistor.

In the low position, voltage passes through the following components:

1. All three resistors in the blower motor resistor
2. Through the blower motor relay
3. To the blower motor

In MEDIUM1 voltage passes through 2 resistors.

In MEDIUM2, voltage goes through 1 resistor.

The high position supplies trigger voltage to the blower motor through the HVAC fuse in the underhood fuse block. Ground is provided at G117.