2014 tahoe dome light does not turn on with driver side door open

Bmussehl · Sep 14, 2024

Hey yall, im new to the forum. Iv got a 14 tahoe that the driver side door does not turn the dome lights on. Every other door works. Iv replaced the latch, teice with no change. I just pulled the door harness out today, with no issue. However i did notice with my compustar drone mobile app, it does show the door is open in there. The truck does not show an icon if its open. Im pretty familiar with these suv’s since i have 2 of them with alot of work i to both. But i dont have a scanner to read any bcm codes and im at a loss. Any input?

Big Mama · Sep 15, 2024

Does the 2014 have a dome override switch? Has someone other than you accidentally turned the knob for lights to a different position?

mikez71 · Sep 15, 2024

There is also a door ajar switch. I am guessing the ajar signal triggers the dome lights..
Might check if your scanner will show the ajar signal.

DDM = Driver Door Module (window switches)

OR VietVet · Sep 15, 2024

Welcome to the forum from Oregon.

My first thought was same as @Big Mama. Override switch?

Bmussehl · Sep 15, 2024

Big Mama said:
Does the 2014 have a dome override switch? Has someone other than you accidentally turned the knob for lights to a different position?

It does have it. The dome lights work completely normal on every other door. And normal by the switch. Drivers door is the only door that dont activate them.

Thats the door modual?!? Fk!!!! Lol the wording in these things is wild lol. Does anyone know off hand if those have to be programmed at all?

Fless · Sep 15, 2024

Bmussehl said:
Does anyone know off hand if those have to be programmed at all?

New ones need to be programmed; a used one from a vehicle with the same options would not need to be programmed. You could use a used one but it would need to be programmed to your VIN's options if the donor wasn't similarly optioned.

You might be able to disassemble the switch and clean the contacts.

Bmussehl · Oct 12, 2024

So i tried cleaning the switch, no luck. Cant really find anyone who knows anything about programming this module either.

mikez71 · Oct 12, 2024

Most likely, if your door module is bad, you will need a new module.

But it sounds like it's your driver door latch that may not be sending a signal that the door is open.
(The door ajar & door open switches in the diagram above)

Looking at this thread.. https://www.tahoeyukonforum.com/threads/crazy-phantom-door-dome-light-issue.150565/

The door ajar tells the computer which door is open, and the door open activates the dome lights...
So while your scanner says the door is open (because of the ajar switch) the door open switch isn't working.

I think...

Bmussehl · Oct 12, 2024

mikez71 said:
Most likely, if your door module is bad, you will need a new module.

But it sounds like it's your driver door latch that may not be sending a signal that the door is open.
(The door ajar & door open switches in the diagram above)

Looking at this thread.. https://www.tahoeyukonforum.com/threads/crazy-phantom-door-dome-light-issue.150565/

The door ajar tells the computer which door is open, and the door open activates the dome lights...
So while your scanner says the door is open (because of the ajar switch) the door open switch isn't working.

I think...

That was my logic at first as well. But i replaced the door latch at least once, very possibly iv done it twice. No change.

mikez71 · Oct 13, 2024

If you try a replacement module, if you get the same year/options, you probably won't need any programming.

You could also jumper J2-5(yellow) with J2-13(gray/black) & J2-11(tan) on your door module.
That should simulate the open/ajar signals and turn on the dome. If that works, then it's a problem with your latch/wiring.

2014 tahoe dome light does not turn on with driver side door open

Bmussehl

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Big Mama

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mikez71

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OR VietVet

Multnomah Falls

Bmussehl

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Fless

Bmussehl

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mikez71

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Bmussehl

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mikez71

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