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I currently am having issues with my driver side seat not reclining. Initially, I thought it might be the motor, however, I'm not really too sure it is now. I unplugged the rear sensors and it still doesn't work. Whenever I try to move it I hear single "click" and that is all so I decided to actually pull the seat apart and do some testing. The motor itself has about 0.02 ohms of resistance so I'm pretty sure it's not the motor. I then checked the voltage being sent to the motor while the seat is plugged in and it looks like there's not anything getting sent from what I see but I did notice that the driver side motor has 4 prongs while the passenger side only has 2.
Does anyone know what these extra prongs in the driver side seat are for? I found these pictures but it really isn't clear to me, I'm not well versed enough in that area.
I currently am having issues with my driver side seat not reclining. Initially, I thought it might be the motor, however, I'm not really too sure it is now. I unplugged the rear sensors and it still doesn't work. Whenever I try to move it I hear single "click" and that is all so I decided to actually pull the seat apart and do some testing. The motor itself has about 0.7 ohms of resistance so I'm pretty sure it's not the motor. I then checked the voltage being sent to the motor while the seat is plugged in and it looks like there's not anything getting sent from what I see but I did notice that the driver side motor has 4 prongs while the passenger side only has 2.
Does anyone know what these extra prongs in the driver side seat are for? I found these pictures but it really isn't clear to me, I'm not well versed enough in that area.
There are DTC codes that are generated for some of the driver's seat recliner potential failures. Some of the failures are potentially in the seat memory module. If you can gain access to a scanner that can read GM body codes you might have some of the seat codes set. That would let you use a factory diagnostic procedure to find out what is happening. Here are some of the codes that are related to the driver's seat recline function:
An OBD 2 scanner won't work as it is limited to emissions-related powertrain and maybe abs/srs codes.
There are DTC codes that are generated for some of the driver's seat recliner potential failures. Some of the failures are potentially in the seat memory module. If you can gain access to a scanner that can read GM body codes you might have some of the seat codes set. That would let you use a factory diagnostic procedure to find out what is happening. Here are some of the codes that are related to the driver's seat recline function:
An OBD 2 scanner won't work as it is limited to emissions-related powertrain and maybe abs/srs codes.
Bill
Hey Bill, thank you for that insight! I am starting to think it might have something to do with the memory module because I’m not seeing any power go to the cable at all. I plugged in a brand new passenger side motor to it and it didn’t move at all. Due to the fact that the other 2 wires are for seat memory I would imagine it wouldn’t matter because it should still get enough power to move? I replaced the switch as well which didn’t help.
Does this scanner look like it could read the body codes?
Hey Bill, thank you for that insight! I am starting to think it might have something to do with the memory module because I’m not seeing any power go to the cable at all. I plugged in a brand new passenger side motor to it and it didn’t move at all. Due to the fact that the other 2 wires are for seat memory I would imagine it wouldn’t matter because it should still get enough power to move? I replaced the switch as well which didn’t help.
It might but unless they say so in print it is hard to know. I use the following scanner and it can read a number of body codes but is a little tricky to set up and requires a PC to run the software:
The instructions are crap and the video shows a screen with Chinese characters which makes it hard to follow what the person demonstrating the product is doing. There are a number of YouTube videos from various people who tell you how to set it up but you need to focus on the recent ones as things have changed since the 2020 time period. Once working it does a good job. It's from Amazon so you can send it back.
I was able to read the body codes and there were not any current codes. The scanner I linked can also read the data streams so I watched the seat memory unit streams for the reclining and the signals seem to get sent without issue. I hooked up a multimeter to the motor(maybe I’m checking that incorrectly?) and I wasn’t seeing any volts at all being sent to the motor. I tried both grounding the multimeter on the seat frame, motor housing, and even the other wires in the connector and nothing worked. It just doesn’t make sense why there’s not any power going to it from what I see if everything else is fine.
Disconnect the motor. Apply 12 volts to pin 1 and ground to pin 3. Those are the large contacts. The motor should run. If it does, then I would suspect the seat memory control module.
Reclining motor wiring
