LOCATION OF BLOWER MOTOR RESISTER CADILLAC SEVILLE STS 2003

Hello, You have a blower motor controller mounted on the blower motor in the front, and a blower motor resistor mounted on the rear blower motor. If only the front has the issue, you will need to test the electronic blower motor controller, as well as the blower motor to determine which has failed. Be mindful, however, that the blower motor fuse may have blown, there may be damaged wires, or the main control unit for the HVAC may be faulty. The main control unit is part of the A/C control panel that you use to adjust setting for the A/C.