2002 JEEP GRAND CHEROKEE LIMITED H.O.

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acoounts@techcitypc.com - 01 Apr 2007 18:52 GMT

2002 JEEP GRAND CHEROKEE LIMITED H.O.

If the head lights are off and I step on the brakes, the brake lights come
on... But the left light is dimmer than the right. When the head lights are
on and I step on th brakes the brake lights come on accept for the left one
goes completely out.

Anyone. Please help.

Thanks, Harold

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Mike Romain - 01 Apr 2007 19:12 GMT

> 2002 JEEP GRAND CHEROKEE LIMITED H.O.
>
[quoted text clipped - 6 lines]
>
> Thanks, Harold

That usually means the bulb has gone bad. When the brake light filament
goes bad, the parts can fail in a way that hitting the brakes lights up
the running light instead.

Or the fixture has lost it's ground which is usually through one or more
of the fixture bolts, but I am not sure on the GC, and the brake light
is stealing ground through the running light's harness ground.

Going all the way out when the headlights are on implies the bad bulb
though.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
Canadian Off Road Trips Photos: Non members can still view!
Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590
(More Off Road album links at bottom of the view page)

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acoounts@techcitypc.com - 02 Apr 2007 16:44 GMT

Hi Mike,
Thanks for your response.
First thing I did was change the bulb.
The issue is that when the headlights are on the running lights work... But
then when I press the brakes all the lights work accept the whole left side
goes out, including the running light.
Im not sure but I think it all started after a recent car wash, although the
fixture itself was dry inside when I changed the bulb.

Harold

>> 2002 JEEP GRAND CHEROKEE LIMITED H.O.
>>
[quoted text clipped - 24 lines]
> Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590
> (More Off Road album links at bottom of the view page)

Reply to this Message

Mike Romain - 02 Apr 2007 17:05 GMT

That would imply the ground then.

The brake light grounds through the fixture or it can backfeed through
the running light filament to ground on it's harness connection if the
ground gets lost. This lights up the running light on one side and the
brake light on the other with the headlights off. With the headlights
on, the power then tries to go the other way or the brake light shorts
out the running light so they go off.

I do not know where the brake light ground tag is on the GC. It might
be a copper strap coming from the fixture to sandwich between it and
the/a bolt that mounts the light.

I test this by running a booster cable from the battery negative to the
rear and then jumping a wire to the side case of the bulb to see if it
starts working. If so I clean the ground.

Mike

> Hi Mike,
> Thanks for your response.
[quoted text clipped - 34 lines]
>> Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590
>> (More Off Road album links at bottom of the view page)

Reply to this Message

Harold Marcano - 02 Apr 2007 17:25 GMT

So in other words try cleaning the bulb contacts and strap contacts?

--Harold

> That would imply the ground then.
>
[quoted text clipped - 53 lines]
>>> Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590
>>> (More Off Road album links at bottom of the view page)

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Dick - 02 Apr 2007 21:27 GMT

My '93 JGC Limited has an LOM (Lamp Out Module) located in a side
panel in the rear. This module monitors all lamps in the rear of the
vehicle, and tells you in a display on the dash when a lamp is out.
Ours got extremely wet somehow, and the dealer ended up having to
replace the entire wiring harness in the rear. Moisture got into the
connectors and literally ate the metal away. If you have one of these
LOM's, it would be worth checking the connectors plugged into it to
see if there are signs of moisture.

Dick

>Hi Mike,
>Thanks for your response.
[quoted text clipped - 6 lines]
>
>Harold

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DougW - 03 Apr 2007 00:47 GMT

> My '93 JGC Limited has an LOM (Lamp Out Module) located in a side
> panel in the rear. This module monitors all lamps in the rear of the
[quoted text clipped - 4 lines]
> LOM's, it would be worth checking the connectors plugged into it to
> see if there are signs of moisture.

Sounds like a busted ground to me.

The 93 was also renowned for poor connectors in the harness.
Specifically the one that runs the rear tail lamps. Thing
is you have to take the inner plastic out to get to the connector.
It's behind the D pillar inside. I had to replace the one on the
passenger side when I put in the tow harness.

Signature

DougW

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Mindy - 04 Apr 2007 23:11 GMT

ok, the Jeep back light is cheaply made and not cheap to fix.....disconnet
both light fixtures...switch fixtures and see if the other side that works
will work on the problem side....if so, you are a victum of a cheap made
light....the little plastic panel that holds the lamps gets hot, it fuses
together the two lights and shorts out both, not all the way but enough to
mess with how it seperates signal and light functions ....NOW the expensive
fix...you have to buy the the lense assembly....they dont sell the small
removable module.....well you could go to a junk yard and see if can find a
cheap module....good luck....

2001 Grand WJ
2000 XJ

> 2002 JEEP GRAND CHEROKEE LIMITED H.O.
>
[quoted text clipped - 6 lines]
>
> Thanks, Harold

Reply to this Message

Harold Marcano - 08 Apr 2007 15:55 GMT

Sorry it took so long. Today I will try the o'l fixture switcharoo. I will
let you all know how it goes.

Thanks,
Harold

> ok, the Jeep back light is cheaply made and not cheap to fix.....disconnet
> both light fixtures...switch fixtures and see if the other side that works
[quoted text clipped - 19 lines]
>>
>> Thanks, Harold

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