When working on a seat heater switch on a car with air bags, start by disconnecting and isolating the negative
Battery Cable which will let the air bag system capacitor discharge after two minutes. We have to lock the steering wheel to avoid the air bag going off accidentally which can cause injury or death. Part of the heated seat switches is built into the Accessory Switch Bank Module (ASBM) and First, cut off the car battery's negative terminal cable and pull out the central bezel of the instrument panel. After that, remove all four screws holding the ASBM onto the back of the instrument panel center bezel and remove the ASBM.