Interior lights stuck on

Reefdude84 · Nov 22, 2022

Hi all I have a 96 k1500 suburban that I can not get the interior light t shut off unless I pull the fuse I have taken out all jam switches and even disconnected dash switch and still they are on I had all wires hanging out from the switches so non where grounding or anything but can't figure out where else to look have searched the forms and non have worked thanks for any help

AuroraGirl · Nov 22, 2022

Reefdude84 said:
Hi all I have a 96 k1500 suburban that I can not get the interior light t shut off unless I pull the fuse I have taken out all jam switches and even disconnected dash switch and still they are on I had all wires hanging out from the switches so non where grounding or anything but can't figure out where else to look have searched the forms and non have worked thanks for any help

is your light switch been replaced or did you ohm test it

Reefdude84 · Nov 22, 2022

AuroraGirl said:
is your light switch been replaced or did you ohm test it

I have not replaced it nor ohm tested it I had unplugged the light switch and would still be on

AuroraGirl · Nov 22, 2022

Reefdude84 said:
I have not replaced it nor ohm tested it I had unplugged the light switch and would still be on

that may be by design, im not sure

Cadillac Bob · Nov 22, 2022

Bye chance is it just rolled up all the way and click on for interior lights? Use your dimmer switch turn it down and see it could just you accidentally switched it on lol

GoToGuy · Nov 22, 2022

So the dome lights are on all the time? And you have checked the door closure switches? And the override on the dome light? And checked the rear cargo doors/ tailgate which ever you have optioned?
If you check the wire diagrams, I have to look again, but I believe when any door switch ( entry or cargo) is activated it provides a ground completing the circuit. With all in normal positions power is standing by till a door opening switch grounds to complete circuit.
In the FSM the drawings show where all the wiring is routed and where grounds are located. Good luck

Intragration · Nov 22, 2022

If you've already checked the dimmer on the dash, the hatch or barn door switch?

Reefdude84 · Nov 23, 2022

Cadillac Bob said:
Bye chance is it just rolled up all the way and click on for interior lights? Use your dimmer switch turn it down and see it could just you accidentally switched it on lol

Lol I wish it was but no I tried that plus the over ride switch still staying on thanks tho

Reefdude84 · Nov 23, 2022

GoToGuy said:
So the dome lights are on all the time? And you have checked the door closure switches? And the override on the dome light? And checked the rear cargo doors/ tailgate which ever you have optioned?
If you check the wire diagrams, I have to look again, but I believe when any door switch ( entry or cargo) is activated it provides a ground completing the circuit. With all in normal positions power is standing by till a door opening switch grounds to complete circuit.
In the FSM the drawings show where all the wiring is routed and where grounds are located. Good luck

Ya they are on all the time same with door lights I checked all door jam switches even in plugged them all hatch too messed with the light switch nothing happened even unplugged the light switch all still on. I just bought it and had seen all the interior bulbs where blown so must have been a issue previouse owner was having and never fixed. I can see why will work on it more tomorrow thanks for the help

mattillac · Nov 23, 2022

"....I have taken out all jam switches and even disconnected dash switch and still they are on....."

Looking over a 1997 diagram it seems as though all the door jamb switches would be wired through the dome override button (dash switch), so the dome override button simply (opens) disconnects all of the door switches from the interior light circuit.

If you disconnected that dome override button (dash switch) and the lights still stay on I think we can be sure it's not the door switches causing the problem.

It seems as though the interior lights are also controlled via either a interior lamp control module or a remote control door lock receiver, maybe depending on whether you have factory remote power locks, you might only have one or the other (I am not sure).

I guess either of those modules would (when required) normally apply a ground (-12v) to the interior light circuit . The diagram says they are under the (dash) center of the instrument panel.

Here are the 1997 diagrams I am looking over.

Without aux lighting

Wayback Machine

With aux lighting

Wayback Machine

Hope that helps, best of luck.

Interior lights stuck on

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