So I’m having the same sort of issue. My drivers switch lights up when switch is flicked to high or low. It doesn’t light up when headlights are to indicate it’s location at night. Seat warms right up though! Now the passenger seat doesn’t warm up or light up. I pulled the switch to find the remnants of a spilled beverage. I replaced the switch and all lights work. High/low lights, night time indicator passive bulb work great. However to my dismay still no heat. My GF is perpetually frozen and her ass is national treasure, and thus, deserves all the pampering I can afford. I think my next step will be checking wires, however I suspect the heating pad has a snapped filament and will need replacing. Anyone ever replaced a heating pad In a front seat? If so, got nud....er ...pics? Appreciate any help folks!