October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
Control Module HVAC: Description and Operation
The blower motor power module is used only on vehicles with Automatic Temperature Control
(ATC). The
power module receives pulse width modulated signals from the
Body Control Module. The power module varies voltage to the blower motor for different blower speeds based on the ATC software. There are 14 speeds and a blower off signal.