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Brake lights not working?

Tiny
KEVIN KERR
  • MEMBER
  • 1 POST
  • 2005 JEEP GRAND CHEROKEE
  • 120,000 MILES
Right rear and cyclops light not working. Left side is fine. Checked bulb and fuses all okay.
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Saturday, November 9th, 2019 AT 3:18 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
If left side works then check wire leading to right under vehicle it may have broken otherwise it may be a can/bus problem or module problem and will need scanning for codes by a mechanic. See picture.
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Saturday, November 9th, 2019 AT 3:18 PM (Merged)
Tiny
PRALOWR
  • MEMBER
  • 3 POSTS
  • 2000 JEEP GRAND CHEROKEE
Tail lights are repeatedly going out. Now they will not come on at all. I have replaced the fuses but they blow every time I use the lights. It is just the rear lights. The front lights work fine. I am truly frustrated and really want this fixed as this is my only vehicle. I need help. I just spent 700 bucks to fix the rear lights and they are doing the same thing all over again. Is it a wire? And if so how do I fix it? I have changed bulbs among other things. I need help.
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Saturday, November 9th, 2019 AT 3:18 PM (Merged)
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Did the repair that was done before correct the issue for a while? If so then I would look into that being the same issue.
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Saturday, November 9th, 2019 AT 3:18 PM (Merged)
Tiny
PRALOWR
  • MEMBER
  • 3 POSTS
JohnnyT73

Thank you for responding.

You are correct. The issue was fixed for a while. It was working great, then it just failed once again. It is truly annoying. Shelling out another 700 bucks, isn't something I want to do for temporary work. Then again, it could be this faulty vehicle. I will keep trying though.

Thanks
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Saturday, November 9th, 2019 AT 3:18 PM (Merged)
Tiny
PRALOWR
  • MEMBER
  • 3 POSTS
CJ MEDEVAC

I will try your avenues that you have presented. Once I have tried I will update on my progress. I really hope this solves the issue. I will keep you posted.

RP
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Saturday, November 9th, 2019 AT 3:18 PM (Merged)
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
I reckon I coulda suggested unplugging both assembles completely, and also doin' the "one at a time thing"

While you have it out, inspect the wires at the connection to see if they have been pinched or rubbed raw and grounding out.

This might eliminate more internal possibilities within the fixture itself, before getting more involved in the rest of the wiring

The medic
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Saturday, November 9th, 2019 AT 3:18 PM (Merged)
Tiny
197COLE
  • MEMBER
  • 2 POSTS
  • 2003 JEEP GRAND CHEROKEE
  • V8
  • 4WD
  • AUTOMATIC
  • 94,259 MILES
Brake lights do not work if Head Lights are on. Head Lights Off-Brake Lights work. Please HELP!
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Saturday, November 9th, 2019 AT 3:19 PM (Merged)
Tiny
197COLE
  • MEMBER
  • 2 POSTS
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Saturday, November 9th, 2019 AT 3:19 PM (Merged)
Tiny
PRENTICE1313
  • MEMBER
  • 1 POST
  • 2003 JEEP GRAND CHEROKEE
  • V8
  • 4WD
  • AUTOMATIC
  • 150,000 MILES
My passenger side brake lights work but not the parking lights and its the same bulb, why?
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Saturday, November 9th, 2019 AT 3:19 PM (Merged)
Tiny
JDL
  • MECHANIC
  • 16,098 POSTS
Dual filament bulb, different voltage circuit. The black wire with yellow tracer should be voltage for tail lamp, the other one is for the stop lamp.


https://www.2carpros.com/forum/automotive_pictures/170934_grand_cherokee_stop_lamp_1.jpg

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Saturday, November 9th, 2019 AT 3:19 PM (Merged)
Tiny
KAPITAL7
  • MEMBER
  • 1 POST
  • 2004 JEEP GRAND CHEROKEE
  • 2WD
  • AUTOMATIC
Brake lights keep going out
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Saturday, November 9th, 2019 AT 3:19 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 108,262 POSTS
Check the brake light switch under the dash at the top of the brake pedal. Make sure it is tight and properly adjusted. Also, make sure the wiring plug is tight.
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Saturday, November 9th, 2019 AT 3:19 PM (Merged)

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