Interior lights always on

[Skahide]

I was given a 98 yukon with the tailgate. I'm trying to get it going as a daily driver.

The interior lights (dome, footwell, etc) stay on constantly unless I pull the courtesy light fuse.

The override button changes nothing.
The dimmer switch changes nothing.
All door and tailgate switches appear to be working fine (even though they dont change anything).

In addition, the buzzer sounds constantly when the key is in the ignition until I shut the door. It buzzes even while the yukon is running, until the door is shut.
I'm not sure if that is normal or not.

 

[OR VietVet]

Difficult but when I first read this I thought you had a bad headlight switch but then you mentioned the buzzer on constantly till shut the door. Now I think my guess is this ignition switch:

https://www.rockauto.com/en/moreinfo.php?pk=96976&cc=1305076&jsn=2243

Again, just a guess.

 

[Doubeleive]

your 98 should have a push button on the door or door frame, when the door is shut the button is pushed in (therefore shutting off the interior dome lights) check that button for operation/continuity. unless I am wrong there should be a button and they didn't go to a integrated door latch until after 00

 

[Skahide]

Well, the buzzer is only when the key is in the ignition (running or not), and the door is open.
Also, I went to the junkyard today and grabbed a headlight switch. It didn't change a thing.

Difficult but when I first read this I thought you had a bad headlight switch but then you mentioned the buzzer on constantly till shut the door. Now I think my guess is this ignition switch:

https://www.rockauto.com/en/moreinfo.php?pk=96976&cc=1305076&jsn=2243

Again, just a guess.

 

[OR VietVet]

There is a button. https://www.rockauto.com/en/moreinfo.php?pk=319628&cc=1305076&jsn=2229

When he said the buzzer went off with door shut I assumed the button was still good but maybe not, huh? So many problems that could all be related to one little switch.

 

[OR VietVet]

Well, the buzzer is only when the key is in the ignition (running or not), and the door is open.
Also, I went to the junkyard today and grabbed a headlight switch. It didn't change a thing.

Well then I guess I am glad I didn't guess that then. I talked myself out of it. Maybe it is what Wes said and all related to that one little door jam switch.

 

[Skahide]

Is this the push button you're referring to? I haven't switched any out but I have gone 1 by 1 and make sure they were being fully depressed. Messing with them didnt change anything.

your 98 should have a push button on the door or door frame, when the door is shut the button is pushed in (therefore shutting off the interior dome lights) check that button for operation/continuity. unless I am wrong there should be a button and they didn't go to a integrated door latch until after 00

There is a button. https://www.rockauto.com/en/moreinfo.php?pk=319628&cc=1305076&jsn=2229

 

[Doubeleive]

Is this the push button you're referring to? I haven't switched any out but I have gone 1 by 1 and make sure they were being fully depressed. Messing with them didnt change anything.

YES, you can pop it out and check it with a meter, if one or more of those are not working or are shorted that could be the problem

 

[Doubeleive]

that's just a guess anyway, the buzzing is normal if the ignition is off, key-in and drivers door open, but shouldn't buzz with the engine running.

 

[Skahide]

YES, you can pop it out and check it with a meter, if one or more of those are not working or are shorted that could be the problem

Ok. I have these in the rear 2 door jambs. I unscrewed them and it is just 1 wire that grounds out when the door is open.
ACDelco 15693389 GM Original Equipment Door Jamb Switch https://www.amazon.com/dp/B0013FBLW2/ref=cm_sw_r_cp_apa_i_1YVwEbQJJRADJ

 

[OR VietVet]

Ok. I have these in the rear 2 door jambs. I unscrewed them and it is just 1 wire that grounds out when the door is open.
ACDelco 15693389 GM Original Equipment Door Jamb Switch https://www.amazon.com/dp/B0013FBLW2/ref=cm_sw_r_cp_apa_i_1YVwEbQJJRADJ

The one fr the front door will have more than one wire connection. It will be one connector but has 2-3 blades in there. For lights and the buzzer.

 

[Doubeleive]

if it is a single wire check the wire for continuity using a ohm meter

 

[TBaganATX]

I have a 94 with the tailgate and it never fails if I go down a bumpy road it’s like a damn light show. Check the hatch glass switch. Mine is on the passenger side just above the tailgate. You will see a black switch that has a plastic but. Try adjusting that.

Good luck


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[Joseph Garcia]

When I had my 97 Yukon, I had a similar issue, and it turned out that the driver door jam push button switch was bad. Once I replaced it, my issues were resolved.

If you do remove the push button switch make sure that you grab a hold of the wiring that attaches to the end of it and secure it, prior to disconnecting it, as it has a tendency to spring back into the space behind the hole where the push button switch is mounted through. That happened to me, and I spent more time trying to fish the wiring back through the mounting hole, than I did for the rest of the entire push button replacement process combined.

 

[Driveway Warrior]

I had the same problem with my '99 Hoe, except that the problem was intermittent. Initial dealership found no problem EIGHT TIMES. (I was one ****** away from turning it back to GM in under the Michigan Lemon Law). A second dealership immediately found the problem to be the door switch, passenger side.

 

[Skahide]

double post

 

[Skahide]

Difficult but when I first read this I thought you had a bad headlight switch but then you mentioned the buzzer on constantly till shut the door. Now I think my guess is this ignition switch:

https://www.rockauto.com/en/moreinfo.php?pk=96976&cc=1305076&jsn=2243

Again, just a guess.

Well I have replaced both the front door jamb switches (pin) and still have the same issue. I've checked the rear doors and hatch switches and they are operating fine.
Out of curiosity, does the ignition switch assembly play any part in the dome lights? Id hate to spend $100 on a guess.

 

[OR VietVet]

If the lights are set correctly the dome lights should come on when you open the driver's door and stay on till you start the engine and then go off if the door is already closed when you start the engine. If the door is still open and start it the dome light stays on. I believe the side interior lights stay on as well.

Has anyone mentioned the dimmer switch? If it is turned all the way up and one detent past all bright, the dome light comes on. Is it set to that all the time?

I read back and you said you replaced the headlight switch. Is the dash dimmer in the same switch or is the dash light dimer separate?

Now that I think of it I believe the dash light dimmer is part of the headlight switch. This is a tuff one.

 

[Skahide]

If the lights are set correctly the dome lights should come on when you open the driver's door and stay on till you start the engine and then go off if the door is already closed when you start the engine. If the door is still open and start it the dome light stays on. I believe the side interior lights stay on as well.

Has anyone mentioned the dimmer switch? If it is turned all the way up and one detent past all bright, the dome light comes on. Is it set to that all the time?

I read back and you said you replaced the headlight switch. Is the dash dimmer in the same switch or is the dash light dimer separate?

Now that I think of it I believe the dash light dimmer is part of the headlight switch. This is a tuff one.

The dome lights stay on constantly no matter the engine/door configuration, until I pull the fuse.

The dimmer switch is part of the headlight switch. Dimmer is turned all the way DOWN. I've tried with override button pushed in, and then popped out.

I did get the headlight switch from a junk yard, so it may be bad too. But it looked mint condition.

 

[east302]

Here are the diagnostic tables for a 98, maybe it will help