WeekenderNutJob
TYF Newbie
- Joined
- Dec 27, 2022
- Posts
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2008 GMC Yukon XL Denali, just the front passenger seat is not heating.
The powered seat controls all work in the front on both sides, and the heated seat on the divers side works fine, just the passenger heated seat button is unresponsive, so not a main fuse issue. Looking at the wiring diagram, the heated seats plug into the power from the seat memory and power controls on each side, which work on the passenger side, so it's getting power on the passenger seat controls. Since the heated seats on the divers side work, I know it's not the gray heated seat control box ground melting issue that is all over Youtube since from my understanding there is only one and the driver's side works fine. I removed the passenger door panel and the switch is plugged in, but no LCD or backlights on the switch. The passenger seat does not heat up either. It's not the same as the issue where you hit the button, and it flashes or only stays on for a moment, this one side is just unresponsive like it has no power, no LCDs
Questions:
--Is there a good way to diagnose further on just the passenger heated seats switch?
--If the heating element on the passenger seat was burned out, would the button even try to turn on or show anything, or is no power/lcd on the switch indicative of any other issue?
--It is my understanding that there are 2 heating elements, one for the butt and one for the back, so if only one was burned out, I would guess the other should still work and the chance of both going out at the same time is slim, so guessing it's not the elements.
--I am assuming it's an "electronic" switch with multiple settings so simply using an ohm meter with it pulled out of the car is unlikely to net me useful outputs, or does someone know a better way to diagnose it?
Am I missing any other diagnostics before I spend $75 on the replacement switch (which I would think would not go bad often).
The powered seat controls all work in the front on both sides, and the heated seat on the divers side works fine, just the passenger heated seat button is unresponsive, so not a main fuse issue. Looking at the wiring diagram, the heated seats plug into the power from the seat memory and power controls on each side, which work on the passenger side, so it's getting power on the passenger seat controls. Since the heated seats on the divers side work, I know it's not the gray heated seat control box ground melting issue that is all over Youtube since from my understanding there is only one and the driver's side works fine. I removed the passenger door panel and the switch is plugged in, but no LCD or backlights on the switch. The passenger seat does not heat up either. It's not the same as the issue where you hit the button, and it flashes or only stays on for a moment, this one side is just unresponsive like it has no power, no LCDs
Questions:
--Is there a good way to diagnose further on just the passenger heated seats switch?
--If the heating element on the passenger seat was burned out, would the button even try to turn on or show anything, or is no power/lcd on the switch indicative of any other issue?
--It is my understanding that there are 2 heating elements, one for the butt and one for the back, so if only one was burned out, I would guess the other should still work and the chance of both going out at the same time is slim, so guessing it's not the elements.
--I am assuming it's an "electronic" switch with multiple settings so simply using an ohm meter with it pulled out of the car is unlikely to net me useful outputs, or does someone know a better way to diagnose it?
Am I missing any other diagnostics before I spend $75 on the replacement switch (which I would think would not go bad often).
