Electrical issues & heated seats quit working
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Electrical issues & heated seats quit working
I have a 2003 Yukon 5.3 engine. RR door ajar message intermittently comes on, interior lights will stay on & power door lock will not stay locked. Security alarm went off at random times. When interior light button is pushed in I do not have the above issues. The dealership replaced the rear door lock assembly. It is still happening. Also drivers side electric seat will not go up and down and the heat quit working. The passenger side heat does not heat now either. I think i read a forum once that suggested replacing BCM. Has anyone else experienced anything like this?
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From: Worcester, Ma.
You have so many things wrong with the vehicle.....
One question is, did this all happen at once? Or did these problems happen one at a time, over a period of time?
Did a GM dealership do the work? Did they replace the RR door lock assembly or the RR door jamb switch?
These issues can be caused by the RR jamb switch....
The driver'* seat not going up/down, could be caused by the motor, the switch, or wiring in between...
The heated seats are a separate problem.......did both stop working at the same time?
The reason I asked if a GM dealership checked this out,is because they would have a Tech II scan tool and can read data from the BCM, to find out if the door jamb switch was sending a door ajar signal....
Also it can check for "B" and "U" codes, which could help with diagnosis....
As for the seats, when you press the switch do the lights in the panels light up(HI/MED/LO/BACK)? Can you hear the seat module under each seat, click when you press their respective switches?
One question is, did this all happen at once? Or did these problems happen one at a time, over a period of time?
Did a GM dealership do the work? Did they replace the RR door lock assembly or the RR door jamb switch?
RR door ajar message intermittently comes on, interior lights will stay on & power door lock will not stay locked. Security alarm went off at random times.
The driver'* seat not going up/down, could be caused by the motor, the switch, or wiring in between...
The heated seats are a separate problem.......did both stop working at the same time?
The reason I asked if a GM dealership checked this out,is because they would have a Tech II scan tool and can read data from the BCM, to find out if the door jamb switch was sending a door ajar signal....
Also it can check for "B" and "U" codes, which could help with diagnosis....
As for the seats, when you press the switch do the lights in the panels light up(HI/MED/LO/BACK)? Can you hear the seat module under each seat, click when you press their respective switches?
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Thank you for your input. I did go to my GM dealer. I dont throw away any papers or receipts! It looks like the code they show is 6234 CP1. They replaced RR latch assy #15110650. They didnt say anything about B and U codes. The seats started acting up a while before that. I have had the heat pads replaced once before several years ago. After reading a few other threads it looks like we need to check the wiring for that.
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From: Worcester, Ma.
Well unlike earlier models, where the seat pads were in series, each pad has a separate circuit......so the back or the seat does not work on either?
As I asked before do the controls light up when you hit
the heated seat switches(LO/MED/HI/BACK)?
When you got your car back, did the door ajar message come right back on? If it did, you should have gone right back to the dealer......they should have tested the doors before giving it back to you.......in my schematic, it shows the door jam switch separate from the latch assembly.......whether that switch is part of the latch assembly, I am not sure.....basically, they should be observing the signal from the door jam switch(my diagram calls it a "mini wedge").....then with the window down, grasp the door and push/pull on it while observing the signal from the mini wedge......if it changes, it'* not suppose to....
I have no clue what that code is suppose to be....
As I asked before do the controls light up when you hit
the heated seat switches(LO/MED/HI/BACK)?
When you got your car back, did the door ajar message come right back on? If it did, you should have gone right back to the dealer......they should have tested the doors before giving it back to you.......in my schematic, it shows the door jam switch separate from the latch assembly.......whether that switch is part of the latch assembly, I am not sure.....basically, they should be observing the signal from the door jam switch(my diagram calls it a "mini wedge").....then with the window down, grasp the door and push/pull on it while observing the signal from the mini wedge......if it changes, it'* not suppose to....
I have no clue what that code is suppose to be....
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Sorry, i didnt answer that. Yes, my heated seat lights come on for just a few seconds or just a second then off. I can lean the seat back, but i can not adjust the bottom of the seat to come up or down by the handle on the side of the seat. It will go forward and back. The service guy did tell me he didnt know if replacing the door part would remedy the problem of the door ajar message. After the dealership worked on the door, it was ok for a little while. It was replaced in July last year so i think i will go back and ask them if that included the switch. I guess i could call them also since it should show up in their computer what was replaced.
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From: Worcester, Ma.
Well, like I said before, you have three motors in the seat....two are for up/down(and also for creating a tilt in the seat cushion, i.e., raise front, lower the rear).....the possibilities are the switch, the motors, or wiring in between....
Simple test, is disconnect the harness from the suspect motor and attach a test light to the harness....when you press the switch to up or down......it should light.....if it does, you need a motor......if it doesn't, and the wires are ok, you need a switch....my guess is, I doubt both up/down motors would fail at the same time(one motor raises/lowers the front edge of the seat, and the other raises/lowers the rear of the seat), so I am leaning towards a switch....
Also, do you hear the memory seat module click when you press your heated seat buttons?
Basically your heated switch sends a signal to the Driver'* Door Module, the DDM then sends a communication signal via Class II serial data to the respective Memory Seat Module.......the module then powers the pads in the seat.....a Tech II would be able to tell if the heated seat switch is communicating with the MSM.....and it would also indicate if there are B and U codes set.....
Simple test, is disconnect the harness from the suspect motor and attach a test light to the harness....when you press the switch to up or down......it should light.....if it does, you need a motor......if it doesn't, and the wires are ok, you need a switch....my guess is, I doubt both up/down motors would fail at the same time(one motor raises/lowers the front edge of the seat, and the other raises/lowers the rear of the seat), so I am leaning towards a switch....
Also, do you hear the memory seat module click when you press your heated seat buttons?
Basically your heated switch sends a signal to the Driver'* Door Module, the DDM then sends a communication signal via Class II serial data to the respective Memory Seat Module.......the module then powers the pads in the seat.....a Tech II would be able to tell if the heated seat switch is communicating with the MSM.....and it would also indicate if there are B and U codes set.....
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Thank you! I went out to check for the clicking sound you mentioned. There is a click sound. I turned on the drivers seat heat, waited a few seconds, then tried the passenger side. As soon as i hit the passenger button, the drivers side went off along with passenger side. I visited a different dealership when i was having the heated seat issues. He supposedly diagnosed it because it cost me $60. They gave me an estimate for both upper and lower seat heater elements and also estimate for adjuster. As i said before, the heat pads had been replaced before, so i was surprised i would need new ones. You have been the only person who has gone into more details on how things function and other possible things causing the issues. I am thinking i may have to tell the service tech exactly what to test for with his Tech II scanner. If i take it to the dealer, do they need to remove a door panel or seat to test it? I dont remember if i mentioned that the passenger seat has no issues with up or down movements.
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