Auxiliary Blower Motor
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
The following are auxiliary blower motor circuits:
- Ground-A constant body ground is supplied the blower motor.
- Ignition voltage-Ignition voltage is supplied to the blower motor from the rear fuse box.
- Low reference-This circuit is grounded through the auxiliary blower motor control module only when the auxiliary HVAC control module is in high speed. In all other blower speeds this circuit is a pulse width modulated signal (PWM). The longer this circuit is pulsed the ground the faster the blower speed will be.