Brake lights not working

Tiny
HENDRIX09
  • MEMBER
  • 2005 JEEP GRAND CHEROKEE
  • 4.7L
  • V6
  • 2WD
  • AUTOMATIC
  • 147,000 MILES
They don't work when pressing pedal. I replaced fuse and stop switch still nothing hazards work back ups work blinkers. And the interior lights turn on and off randomly
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Thursday, August 7th, 2014 AT 4:50 AM

14 Replies

Tiny
KEN
  • ADMIN
Hello,

There is a brake light control relay that goes out, here is a wiring diagram that will show you where it is and a guide on how to test it.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Here are the relay locations (below)

Please run this test and get back to us so we can continue helping you.

Best, Ken
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Wednesday, March 15th, 2017 AT 1:20 PM
Tiny
ANNI369
  • MEMBER
  • 2004 JEEP GRAND CHEROKEE
  • V8
  • 4WD
  • AUTOMATIC
  • 93,000 MILES
My brake lights stopped working, I checked the fuse, and replaced it, but they still dont work. All other lights are fine. What might be done about this?
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
MERLIN2021
  • EXPERT
Is the "cyclops" working? High mount brake light? If no then check the stop light switch on the brake pedal arm, if yes, check the multifunction switch(blinker).
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
JTTLR
  • MEMBER
I had the exact same problem. If you go to an auto part store and ask for a brake light switch they will have one. Its about 12 bucks. Take to a dealer ship and ask them to put it in. I did and they done it for free. Good luck
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
QUINTON WHITE
  • MEMBER
  • 1995 JEEP GRAND CHEROKEE
  • 6.0L
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 160,000 MILES
My driver side break lights are not working. I put in new bulbs, still does not work what could it be?
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
WRENCHTECH
  • EXPERT
It is probably a bad socket, but you need to test for power and ground arriving before concluding that.
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
NANCY T
  • MEMBER
  • 1999 JEEP GRAND CHEROKEE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 169,000 MILES
My daughters 99 GC jeep will not start It has a new battery, new battery cables. Gages jump all over the place so I read if you take off the neg cable for a few minutes it might help but it didn't I tried jumping it nothing but if I tap the pos. Side of the battery it acts like it will start. I removed and cleaned that cable and terminal still will not start. Also her rear pass. Brake light does not work again bulb was blown so I replaced it could it be a short in the brake wiring?
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
CJ MEDEVAC
  • EXPERT
Does it have a "squeezer dealee" connecting the cable to the clamp? Clean it too! Sometimes you can flip, the top of the squeezer over, and get more pressure on the cable

as for the rear lighting, might not be burned out, lots of problems with the "twisty light holders"---on the holder, sorta bend the brass contact out some more.A little sanding on the circle, of the tail light side, smear on a little "dielectric grease". Presto, your fixed. Might as well do 'em all. It's only a matter of time!

THE MEDIC
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
TANGO307
  • MEMBER
  • 2000 JEEP GRAND CHEROKEE
  • V8
  • AWD
  • AUTOMATIC
  • 158,455 MILES
Electrical problem
2000 Jeep Grand Cherokee V8 All Wheel Drive Automatic 158455 miles

Brake light works fine when brakes applied. Tail light works fine when turned on. With lights on and apply brakes, tail light goes out and no brake light. Only on left side, right side works well and middle lbrake light on top of lift gate works fine.
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
This is a grounding issue, you will want to inspect ground wiring at both taillight assemblies to ensure wiring is connected properly and not dirty or damaged.
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
  • MEMBER
  • 2002 JEEP GRAND CHEROKEE
  • 180,000 MILES
I've been told that my brake light doesn't work with the headlights on because of a broken ground wire. How do I repair the ground wire?
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
CARADIODOC
  • EXPERT
You find where it's broken first. That determines how it's repaired. You might install a new terminal, splice a cut wire, or if it's severely corroded, run a new wire. If the wire is corroded off a socket, replacing the entire socket is usually easiest. Some vehicles use printed circuits on the lamp housings and those can develop a hairline crack. Some can be repaired. Some have to be replaced.
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Wednesday, March 15th, 2017 AT 1:21 PM (Merged)
Tiny
ROBIN MCCOY
  • MEMBER
  • 2000 JEEP GRAND CHEROKEE
  • 4.0L
  • 4 CYL
  • AWD
  • AUTOMATIC
  • 2,000,000 MILES
No brakes lights.
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Wednesday, March 15th, 2017 AT 1:22 PM (Merged)
Tiny
CARADIODOC
  • EXPERT
Could you provide some hints or observations to analyze? Have you checked the fuses? Brake light switch? Do the other lights work correctly? Do you have cruise control? If so, does it work and does it cancel when you tap the brake pedal?
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Wednesday, March 15th, 2017 AT 1:22 PM (Merged)

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