2002 Jeep Grand Cherokee Laredo dome light stuck on - JeepForum.com
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post #1 of 17 Old 09-17-2020, 09:25 AM Thread Starter
Maddycd20
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Wj 2002 Jeep Grand Cherokee Laredo dome light stuck on

My 02 Jeep Grand Cherokee Laredo has an issue with the interior lights being stuck on and so far I've checked the fuses, the door wiring and all the door switches as well as all the connections. I know the black wire controls the dome lights, dash lights and pretty much all the door controls but I seem to be at a loss for what to do next. I would like to have control over the lights again but maybe its a loss cause I don't know please help.


That Grand Cherokee life though
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post #2 of 17 Old 09-17-2020, 11:28 AM
blueseasons
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The black wire is the ground wire. I'd be surprised if thats not broken.
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post #3 of 17 Old 09-17-2020, 11:54 AM Thread Starter
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I fixed that wire some time ago and even extended it to give it extra length because it was originally too short. My thoughts are if that ground wire was broken my windows or door locks wouldn't be working along with the dash lights correct?

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post #4 of 17 Old 09-17-2020, 05:29 PM
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Try the cabin light dimmer dial

Maybe you;ve already done this, but have you checked that the cabin lights dimmer switch is not turned all the way on? The cabin lights are dimmed by the dial/ring that rotates around the headlamp multifunction switch that's located to the left of the steering wheel. You'll see the 'OFF' that dims them completely. Turn that dial totally the opposite direction and the cabin lights remain on - even when you lock the car up and walk away.
It's caught a lot of WJ drivers out over the years (I think it's the same on the ZJ from memory).
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post #5 of 17 Old 09-17-2020, 07:08 PM Thread Starter
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Originally Posted by 62JEEP View Post
Maybe you;ve already done this, but have you checked that the cabin lights dimmer switch is not turned all the way on? The cabin lights are dimmed by the dial/ring that rotates around the headlamp multifunction switch that's located to the left of the steering wheel. You'll see the 'OFF' that dims them completely. Turn that dial totally the opposite direction and the cabin lights remain on - even when you lock the car up and walk away.
It's caught a lot of WJ drivers out over the years (I think it's the same on the ZJ from memory).
Yes already knew that but thank you
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post #6 of 17 Old 09-17-2020, 08:36 PM
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Thats not how it was for me. My inside lights just didnt turn off until the BCM turned them off after 15 minutes. It seems to affect different things and I cant explain that. Currently My passenger rear window will go down,but not up with that door switch. With the main driver switch it doesnt do anything.I know its not the motor or cable.
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post #7 of 17 Old 09-18-2020, 06:50 AM Thread Starter
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Thats not how it was for me. My inside lights just didnt turn off until the BCM turned them off after 15 minutes. It seems to affect different things and I cant explain that. Currently My passenger rear window will go down,but not up with that door switch. With the main driver switch it doesnt do anything.I know its not the motor or cable.
I have similar issues with my passenger window on the drivers side. It would roll down randomly after starting the Jeep or while driving. Only it would roll back up very slowly and sometimes stop a quarter of the way to the top. My other back passenger window would just roll up and down slowly as well.
Originally I thought it was the motor in both windows until I pulled the drivers side door panel off and basically unplugged and re-plugged all the connections, which I didn't expect to do anything because, I was looking for damage to the wires or something in that manner. After I did that though they seem to both be working fine now.
My sunroof in the winter after a lot of snowfall would open automatically after the Jeep was started. So if I ever forgot to clean it off, I would be getting a big snowy surprise and I have no idea as to why or how it happens.

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post #8 of 17 Old 09-18-2020, 09:25 AM
blueseasons
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Take this for what its worth from somebody that read it someplace else. But random operation usually points to bad grounds. If you live in an area with high humidity, or rust, a bad ground will send electricity looking for a good one and can cause all kinds of issues.
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post #9 of 17 Old 09-18-2020, 11:08 AM Thread Starter
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Originally Posted by blueseasons View Post
Take this for what its worth from somebody that read it someplace else. But random operation usually points to bad grounds. If you live in an area with high humidity, or rust, a bad ground will send electricity looking for a good one and can cause all kinds of issues.
Well I guess I better start digging around and really going through things then. Thank you for info and for your help! I have to let you to let you know what I find out.

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post #10 of 17 Old 09-18-2020, 01:32 PM
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By the dome light, do you mean just the one in the back (which you can certainly switch off on its own, not sure about "on") or all the interior lights? I had that, once they stayed on for,probably, a 20 minute drive but afterwards behaved themselves. However, that was the 1st indication that something was wrong, next the driver's window wouldn't go down - & a few minutes later it did, another time it wouldn't close, no big deal as it was a warm day (& the a/c's toast). Went out to it late that night - it worked fine. Then there was one time the mirrors wouldn't fold in (now that could be expensive in Devonshire lanes). There was the, however, a persistent failure of the driver's "courtesy light" to come on, which was curiously irritating, so eventually, curiosity got the better of me & working from the socket forwards I investigated the harness between the A-pillar & the door; never found the wires for that lamp but both the ground & the red/white(?) bus wire were only held together by their insulation. Having fixed those I plucked up courage to open all the windows AND they closed again! Everything else seems to work as it should - even that courtesy light works in unison with all the others.
I also extended the wires I repaired but I'm not sure that's a permanent fix 'cos although it reduces the tension on them, I do wonder about stuffing the extra wire, doubled over on itself, won't cause its own problems.
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post #11 of 17 Old 09-18-2020, 02:21 PM Thread Starter
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Originally Posted by UKXJ View Post
By the dome light, do you mean just the one in the back (which you can certainly switch off on its own, not sure about "on") or all the interior lights? I had that, once they stayed on for,probably, a 20 minute drive but afterwards behaved themselves. However, that was the 1st indication that something was wrong, next the driver's window wouldn't go down - & a few minutes later it did, another time it wouldn't close, no big deal as it was a warm day (& the a/c's toast). Went out to it late that night - it worked fine. Then there was one time the mirrors wouldn't fold in (now that could be expensive in Devonshire lanes). There was the, however, a persistent failure of the driver's "courtesy light" to come on, which was curiously irritating, so eventually, curiosity got the better of me & working from the socket forwards I investigated the harness between the A-pillar & the door; never found the wires for that lamp but both the ground & the red/white(?) bus wire were only held together by their insulation. Having fixed those I plucked up courage to open all the windows AND they closed again! Everything else seems to work as it should - even that courtesy light works in unison with all the others.
I also extended the wires I repaired but I'm not sure that's a permanent fix 'cos although it reduces the tension on them, I do wonder about stuffing the extra wire, doubled over on itself, won't cause its own problems.
Hey I'm sorry I didn't specify about the lights. So my issue is with all the interior lights being on all the time and having no control to turn them off, this includes all 5 interior lights. They turn on when the Jeep is started and pushing the buttons that normally turns them off has no function anymore, they only turn off after the Jeep has been shut down for at least 10 to 15 minutes. The ground wire is the black wire which is the one I fixed and extended, having said that I know it controls my windows, door locks, dash lights, interior lights.

That Grand Cherokee life though
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post #12 of 17 Old 09-20-2020, 02:10 AM
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No need to apologise, just wanted be sure I understood the problem.

Must confess I didn't know there was a switch to turn them all off, thought they either went off after a specified time or when the ignition was turned on, but that might be wort looking at.

However, while it's true that ground wire is the prime suspect, from my investigation into my "courtesy lights" (i.e. the ones in the doors) they don't have a black wire, suggesting it's not as simple as everything having a common ground.

I'd still go back to that harness where you fixed/lengthened the ground wire because, as I mentioned, I'm not convinced the way we both did this repair will prove to be durable. Also examine the red/white wire, which is same gauge as the ground, equally strained & so just as likely to fail in the same way - with similar, unpredictable results
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post #13 of 17 Old 09-24-2020, 06:09 PM
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Quote:
Originally Posted by 62JEEP View Post
Maybe you;ve already done this, but have you checked that the cabin lights dimmer switch is not turned all the way on? The cabin lights are dimmed by the dial/ring that rotates around the headlamp multifunction switch that's located to the left of the steering wheel. You'll see the 'OFF' that dims them completely. Turn that dial totally the opposite direction and the cabin lights remain on - even when you lock the car up and walk away.
It's caught a lot of WJ drivers out over the years (I think it's the same on the ZJ from memory).
GUILTY !
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post #14 of 17 Old 09-26-2020, 06:11 AM
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Did you put leds in it? Sometimes they will still draw power even off
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post #15 of 17 Old 09-26-2020, 04:29 PM
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Originally Posted by TastyWheatLoaf View Post
Did you put leds in it? Sometimes they will still draw power even off

Yup, also happened to me when I put leds all round. I gradually reduced the number of led lights to just the front half of the cabin and the power draw dropped enough for me to keep those in.
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