Hi Try this before bringing your car to the dealer or automotive electronics specialist. This will clear the stored codes and keep only the ones if any that do show up after the test. Undo the batt [ + ] terminal count to 20 seconds [car door closed no keys in car everything off, tighten the terminal back on after 15 seconds and start car, if lights come back on then you have a problem that should be looked at. Please do not disable safety systems, like air bags, abs/anti lock brakes etc, they are there for your safety. AND PLEASE anyone saying to do so IME working for GM and eating oil for most of my life is asking for trouble by saying to pull the light or don't bother with safety systems. HTH 442W30
BLOWER MOTOR RESISTOR BLOCK DESCRIPTION Vehicles with manual air conditioning (non-ATC) systems will have a blower motor resistor block. The resistor block is mounted to the lower right side of the HVAC housing in the passenger compartment, where it can be accessed for service. The blower motor resistor has multiple resistor wires, each of which will change the resistance in the blower motor ground path to change the blower motor speed. The blower motor switch directs the ground path through the correct resistor wire to obtain the selected blower motor speed. The blower motor resistor cannot be repaired and, if faulty or damaged, it must be replaced. OPERATION With the blower motor switch in the lowest speed position the ground path for the motor is applied through all of the resistor wires. Each higher speed selected with the blower motor switch applies the blower motor ground path through fewer of the resistor wires, increasing the blower motor speed. When the blower motor switch is in the highest speed position, the blower motor resistor is bypassed and the blower motor receives a direct path to ground. DIAGNOSIS AND TESTING - BLOWER MOTOR RESISTOR BLOCK For circuit descriptions and diagrams, (Refer to Appropriate Wiring Information). WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN AN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY. (1) Disconnect and isolate the battery negative cable. (2) Unplug the wire harness connector from the blower motor resistor. (3) Check for continuity between each of the blower motor switch input terminals of the resistor and the resistor output terminal. In each case there should be continuity. If OK, repair the wire harness circuits between the blower motor switch and the blower motor resistor or blower motor as required. If not OK, replace the faulty blower motor resistor. REMOVAL WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, WARNING: ON VEHICLES EQUIPPED WITH AIRBAGS, DISABLE THE AIRBAG SYSTEM BEFORE ATTEMPTING ANY STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE. DISCONNECT AND ISOLATE THE BATTERY NEGATIVE (GROUND) CABLE, THEN WAIT TWO MINUTES FOR THE AIRBAG SYSTEM CAPACITOR TO DISCHARGE BEFORE PERFORMING FURTHER DIAGNOSIS OR SERVICE. THIS IS THE ONLY SURE WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN AN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE PERSONAL INJURY. (1) Open hood and disconnect the negative battery cable remote terminal from the remote battery post (Refer to 8 - ELECTRICAL/BATTERY SYSTEM/CABLES - REMOVAL). (2) Remove lower right underpanel silencer/duct. (3) Disconnect wiring connector to the blower motor resistor. (4) Remove the blower motor resistor retaining screws. (5) Remove the blower motor resistor from the HVAC housing. INSTALLATION (1) Install the blower motor resistor in the HVAC housing. (2) Install the two screws that secure the blower motor resistor to the HVAC housing and tighten to 2.2 N·m (20 in. lbs.). (3) Plug in the harness connector to the blower motor resistor. (4) Install the lower right underpanel silencer/duct. (5) Connect the negative battery cable remote terminal to the remote battery post(Refer to 8 - ELECTRICAL/BATTERY SYSTEM/CABLES - INSTALLATION).
The blower motor resistor block is located on the underside of the HVAC housing (Heater Box) next to the blower motor. The blower motor is located at the right side of the dashboard. You can access the blower motor resistor block from under the dashboard. A Word of Caution! Stay clear of the blower motor resistor block heat sink - It could be Hot. Incidentally, I have read about people working on their dashboards and setting off the airbag. It is a good thing to disconnect the negative battery cable from the battery and make sure that it can not touch the battery post. Wait at least a couple of minutes for the airbag system to discharge.
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