2003 Heated Seat Issue (Random Cycling)

[cr0ut0n]

You ever make any progress on this?

 

[dps01]

You ever make any progress on this?

Working on it.
Cleaned driver seat control module connections

Cleaned / reseated all connections on the memory control module.

Still need to find / clean ground on B pillar.

Also have replacement seat heater elements to install when I replace the bottom seat cover. When the seat is out, I will trace out all the wiring attached to the seat for abnormalities.

It’s intermittent, so the jury is still out.
Rained a fair bit earlier this week and today the seat heater did not cycle on its own, but I am not ready to claim success.

 

[dps01]

not ready to claim success

Success is sometimes elusive…
Have had soaking rains and the random seat heater operation saga continues.

Will do additional checks when seat is removed for leather replacement. For now may just unplug the heater harness.

 

[03yukonxldenali]

I have same problem with my 03 Yukon xl Denali. It’s at the shop today getting new heating elements. Mechanic is leaning towards it being a malfunctioning seat control module. That being said, I’ll post later when I have more information to see if this solves the problem. I will proceed to clean the grounds and check wiring next. Maybe the two of us can tackle this problem together

 

[dps01]

Mechanic is leaning towards it being a malfunctioning seat control module.

Will be interesting to see what they tell you….

Good luck… and welcome to the forum.

 

[03yukonxldenali]

Will be interesting to see what they tell you….

Good luck… and welcome to the forum.

Thanks! So unfortunately this did not solve my problem. I replaced the driver door control module and that seemed for be a small bandaid as it does continue to cycle but not as aggressively and quickly with longer gaps in between. That being said, I’m not sure where to continue from here

 

[Big Mama]

Did you find the ground on the B pillar?

 

[dps01]

unfortunately this did not solve my problem. I replaced the driver door control module and that seemed for be a small bandaid as it does continue to cycle but not as aggressively and quickly with longer gaps in between.

In my case, have not found the definitive answer either. Anecdotally, the heater cycling stops sooner if the heaters are turned off (or attempted) with the driver door open.

Will recheck ground points again as frequency was initially diminished following first cleaning.