why dont my brake lights work when i have my lights on

Thank you.

No problem

I put a new brake light switch in and it is still doing the same thing, and other suggestions. ??

Hhhhmmmmmm.... Then I'm going to say that you have a short somewhere. Start at the tail lights and look at every wire follow them to junction points, connectors and grounds. If you know how to use a test light or a volt ohm meter it would be helpful.

I have a 99 grand cherokee laredo i have replaced both light bulb in the tail light they turn on when i turn the head lights on but when you push the breaks they dont come on when i have the head lights off and when the head lights are on the brake lights dont get bright i even replaced the brake switch what els could it be

If you turn on the flashers, do the lights in the rear flash? If so, the bulbs are good. If not, then you may have a bad flasher, or the bulbs are burnt out. If the flashers are working correctly, step on the brake pedal and check if the flashers stop. If they keep working, you have a bad brake light switch.

I have exactly the same problem... and i have already replaced the brake light switch too,,, not a fix yet. I havent been able to leave my home after dark in 2 weeks and i have already received my 1st warning ticket so i cant take any more chances ..What is your opinion on the multi function control switch? seems like it should have to do with the auto headlamps/ or module designed to control the rear tail lights (like when a trailer hitch harness is installed it has to bypass the module while still providing current to the trailer lights)??

2001 can i by pass the break light switch and wire it diffent tempary

Its the heat from the bulb. Badly designed rear light assembly. Bulb melts plastic around points. You can try (A) solution which might only be temporary, or (B) buy a new, improvedrear light assembly for around $40. (A) 1) The cause of the problem is heat from the bulb. 2) Remove the light assembly as if you were going to change a bulb. 3) Turn the socket and remove it from the taillight assembly and set it aside(check to be sure your bulb is not burnt out). 4) Look at the opening, you will see 3 flat chrome colored contacts on the assembly. 5) Notice the one by it self at the top of the opening, that is the “ground”. 6) If you look closely you will notice the plastic around the ground contact has shrunk a little bit, this caused the contact to pull away from the socket, causing the problem. 7) With a small flat head screwdriver, VERY GENTLY pry up the contact so it stays slightly upward by itself. 8) Re-insert the bulb assembly back into the housing and press your brake petal with your lights on. 9) You should be in good to go! 10) Tools: Phillips head screwdriver and a small flat head screwdriver. 11) Time : 5 minutes per light

Wondering why Jeep didn't do a recall on this. My Jeep does the same thing.

I have a 2000 Jeep Grand Cherokee the right side of my blinkers and tails lights work but the left side doesn't. I can turn the bulb and it work but will just stop working.I changed the bulbs brought a new tail light.still the same.hiw would I trouble shoot this problem

2000 grand cherokee I have replaced tail light assembly, replaced sockets and bulbs and blinkers work, tail lights work, reverse lights work, but STILL no brake lights. Stop light switch has been changed, also. What do i do now???

If you can see only night light or brake light separately from the same bulb but the light is not very bright in both cases it means most likely that your bulb is good, the circuits feeding voltage to both filaments in both cases okay, the other ends of both filaments are connected okay, so when one of thecircuits is on and another is grounded (it's my guess of the Jeep s design) the small current goes through both filaments. Why? Because the other connected ends are not grounded! Instead of a single bright filament, you have two not bright. And you have nothing when both circuits or on, as there is no ground anywhere. So now you know what to do - ensure ground on the other side. It's my guess.

I had this issue and was able to fix it easily. It is just bad contacts on the bulb retainer. I followed the directions on this video and it worked. https://youtu.be/vLyfy2COi5s

BPM is the man, perfect call! My son has an 01 Grand Cherokee. With the same light problem. I took the light assembly off. Sure as hell, there was a small melted spot by the ground. I pried the ground tab up a bit & reassembled the unit. All lights worked like there supposed too. Thanks!

Same problem, no brake lights but all others do...I have a trailer hooked up and all lights work on it except the brake lights as well. Bad Brake light switch? work vehicle need help fas

B.P.M. nailed it. Socket deformed. Now tell me why my airbag light and chime keeps coming on.

My 2001 has the same problem. I've changed every fuse, the brake light switch, and bought brand new tail lamp assemblies that have wires that go to individual bulbs. Still no brake lights!!! I'm stumped.