Door ajar sensor issue?

Jack Daniels · November 30, 2023

On 11/28/2023 at 10:40 AM, mikeyk101 said:

So what did you find when you checked the wiring? Were there any broken or chafed wires where wiring passes out the door to the connector?

I couldn’t find anything inside the truck shorted, open, or chafed. I didn’t even bother with the outside because by that point the issue stopped and failed with the door closed position and I was beyond fed up with it.

That said, I didn’t spend an absolute ton of time checking wiring inside either. Quick inspection of the accordian harness in drivers door and the door with the issue. Pulled the accordian back, spread the wires apart looking for anything obvious. Checked the pins against ground, looking for shorts, looked for recessed pins, etc.

Removed the door panel, rinse lather repeat, looking for obvious issues. Found nothing.

I read on another forum that there’s circuitry that passes through the door latch mechanism, so I replaced it out of desperation. No joy, that didn’t solve anything either.

I hooked 12v directly to the window motor to see if that maybe had issues because the same door that has the ajar issue, well that window doesn’t work either. Window motor worked great.

I still believe it’s wiring related though because how haywire my truck went during that rainy spell. Then when the sun came out, the issue went back to its normal intermittent self. (Then later failed completely)

Maybe I’ll see if I can get my hands on some wiring diagrams. Or sell the truck. Who knows.

Jack Daniels · December 3, 2023

FOUND IT

So since my passenger/right rear door was the main problem child, (window not working and door ajar) I decided to deep dive into that door.

I removed the door panel, disconnected the accordion from the pillar, disconnected all plugs from locks, window button, speaker, crash sensor, etc. and I pulled the entire darn harness out of the door completely. Quick inspection of the overall harness… looked great. Then I said screw it and I cut the accordion boot clean off, then cut the tape that the wires are wrapped in underneath that same boot.

BAM! The wires were soaking wet (it hasn’t rained here in weeks), broken, and corroded.

Looks like I’m headed to the stealership tomorrow for new harness. I’m an avionics technician so I would just repair those wires… but I had a fit of rage and cut the boot off. Damn.

Edited December 3, 2023 by Jack Daniels

MikeBMW · December 3, 2023

2 minutes ago, Jack Daniels said:

FOUND IT

So since my passenger/right rear door was the main problem child, (window not working and door ajar) I decided to deep dive into that door.

I removed the door panel, disconnected the accordion from the pillar, disconnected all plugs from locks, window button, speaker, crash sensor, etc. and I pulled the entire darn harness out of the door completely. Quick inspection of the overall harness… looked great. Then I said screw it and I cut the accordion boot clean off, then cut the tape that the wires are wrapped in underneath that same boot.

BAM! The wires were soaking wet (it hasn’t rained here in weeks), broken, and corroded.

Looks like I’m headed to the stealership tomorrow for new harness. I’m an avionics technician so I would just repair those wires… but I had a fit of rage and cut the boot off. Damn.

Whoa, nothing like the nuclear option.
Gotta look for where the water got in first, or, maybe, if you didn't buy it new, it's been there all along along and you were the unlucky recipient of the result?

Jerome Veal · December 13, 2024

Same Issue here but with left rear passenger door. Power step doesn't come down. no signal that door is open or closed. it the door will lock and unlock. I found thick black wire broken. Does anyone have a wiring diagram?

PNW Donnie · February 3, 2025

Im having the same issue in a 2015 2500. I replaced the whole door wiring harness and the door latch assembly on driver door and still having the same intermittent issue. Any ideas? im wondering if maybe its computer related?

Edited February 3, 2025 by PNW Donnie
To add more info

GMCustomerService · February 5, 2025

On 2/3/2025 at 4:01 PM, PNW Donnie said:

Im having the same issue in a 2015 2500. I replaced the whole door wiring harness and the door latch assembly on driver door and still having the same intermittent issue. Any ideas? im wondering if maybe its computer related?

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