Fan Blower Motor

WARNING: This page is about a different car, the 2001 Saab 9-3 and 2000 Saab 9-3. However, it is still accessible from the selected car via links, so may be relevant.

Fan blower motor is powered directly from circuit +30 and fuse "C" (30-amp), located in main fuse/relay box at left end of dashboard. Fan blower motor ground is provided through fan control unit. See Figure . Fan control unit is controlled by ACC control module. Fan control unit is controlled by an analog current of 0-5 volts from ACC control module 39-pin connector terminal No. 14 (Gray/Red wire on 2000 models; Red/Gray wire on 2001 models). Battery voltage is supplied to fan control unit from ACC control module 39-pin connector terminal No. 5 (Pink/White wire on 2000 models; White/Pink wire on 2001 models). Fan blower motor speed will increase as control current increases.

Fan blower motor speed is affected in AUTO mode as follows:

An increased difference between selected temperature and in-vehicle temperature will increase fan blower motor speed.
Ambient temperatures less than 41°F (5°C) or more than 68°F (20°C) increase fan blower motor speed.
Increased solar intensity at ambient temperatures more than 59°F (15°C) increase fan blower motor speed. Desired fan blower motor speed can also be selected manually on ACC control module. Fan blower motor speed has 10 speed steps of about 2 amps each. If blower fan speed button is pressed for more than one second, fan speed will increase or decrease automatically. Fan blower motor speed bars are displayed on ACC control module display.