the flashers also work. I've had this vehicle for about a month, and the CarFAX showed no accident. Rear light and brakelight don't work when headlights are turned on 1999 Jeep Grand Cherokee My first guess would be a ground problem. 3,381 satisfied customers. Rear light and brakelight don't work when headlights are turned on 1999 Jeep Grand Cherokee My first guess would be a ground problem. I have previously had my Jeep dealer replace the TIPM and this fixed... Search "" across the entire site Search "" in this forum Search "" in this discussion. I have checked fuses (fine) bulbs are good. Find answers to all your Jeep Patriot technical questions. When I turn off my headlights my brake lights work but that's all. If the headlights are on, the tail lights work, directionals work, but the brake lights don’t work. When the car comes to a stop at a red light, the tail lights will go dark… usually the third brake light will come on, but often all rear lights are dark. When the lower lights do not come on and only the third-brake light works, the brake-light switch may be ruled out. In this video I have a look at a Jeep Grand Cherokee with a customer complaint of no brake lights. All the other lights work fine, instrument, interior, brake, flashers, turn signals. I’ve noticed on my trailers with LED’s that some of the lesser-quality LED’s are very voltage sensitive. The clearance lights and turn signals do work. Thanks so much. Ask a Car … When your brake lights don't work, it is usually because of a blown fuse, a worn-out or broken brake light switch, or a burned-out light bulb. When lights come on my left turn signal stays on and left signal blinks fast. When the pedal was pressed, it went up to 12.0 volts. 2) Turn signals work. Nothing seems to be working. we checked the bulbs, they are ok. all other lights work, hazzard, turn signals, night, just no brake lights. The causes for dysfunctional rear lights are: Burnt bulbs; Blown out fuse And on most vehicles, the brake light system is usually a simple circuit that includes a brake light switch, the light bulbs or lamps, a fuse, and the wiring that connects these devices. and I also want to know where is the fuse of the tail lights. The 3rd (High Mount) brake light works fine in either situation. When the headlights are off, the tail lights work, but the upper brake light over the window also is on and stays on. The brake light (passenger side) went out. Maybe we will try to find a switch and go from there. I was also thinking that it may be due to the humidity/wetness. 4 people found this helpful. Hi! Just no tail lights, parking lights or dash lights. When the headlights are on, only the 3rd brake light works. Tail lights and headlights work. 7 Posts . However, my running lights work just fine. if brakes dont work then the hazard switch is most proberly the problem. The trouble is most likely due to a bad chassis ground which will cause a voltage drop across the car chassis due to the high current draw of the headlights. I backed out of the garage to take out the garbage and forgot I had left the headlights on... :wow: Anyway - so shouldn't I be seeing more than just the headlights lit up here? Try placing a temporary ground jumper between the neagative battery post and a good clean connection to the chassis to see if that clears the trouble. Why don't you disconnect the tail lights completely and see if the turn signals work again with the headlights on. Question type: Maintenance & Repair. Any thoughts? Lights. 45 46 47. But the passenger side brake light still doesn't work. When the lights are off they work fine. If the headlights are on, the tail lights work, directionals work, but the brake lights don’t work. I was pulled over the other day by a Sheriff who informed me that my brake lights were not working properly. The vehicle hasn't been modded so the wiring is original and in the original location, and I've been looking at that but can't find anything obvious like broke wire, broke connector, etc. So it is odd when the turn signals work but the brake lights don't. I went to the dealership multiple times and after paying far too much $ … I've read on forums before that the problem was likely the turn signal switch. You may have to remove the cover of the tail light. Turn signal problems and diagnosis can get confusing, especially when a system shares wires and connections with the parking, warning, and braking light systems.. You have a bad ground somewhere, probably in the headlight circuitry. If the headlights are off, the brake lights and directionals work fine. I discovered that the brake lights work just fine when the headlights are off, but when I turn on the headlights they do not work properly. Burnt out light bulbs – The other reason your tail lights are not working but your headlights are maybe a blown bulb. The Hazards and the turn signals do not work. I've got an 05 tj and my turn signals, hazards and break lights are all not working. When the headlights were turned off, the voltage went to zero. Yes, I typed 24 when I meant 23 on the original post regarding the fuse. Hey everyone how's it going. 2000 Jeep Grand Cherokee rear brake lights out because of defective design. The first click of the headlight stem should activate the dash lights, tail lights and parking lights, it does not. Brake light issues-when the headlights are on, the brake lights go out from the research I have been doing, the manufacturer is well aware that there is a very widespread problem with these lights. Truck: 1987 2.5l, AX4 2WD. my problem. In my case, the brake lights didn't work but the turn signals did, so that told me the wiring to the bulbs was OK and the wiring running in the frame was OK and the bulb contacts were OK. Could the problems be related? If the turn signals or hazards are on and then the headlights are turned on, the lights stop blinking. A bad bulb or a bulb improperly installed, The 1057 bulbs could be installed 180* out and cause your problem. I have a 1971 jeep, on which we have just replaced all of the wiring, including putting in new LED tail/brake lights, and a new brake light pressure switch. Technician. The socket fails with moisture enters – this may also cause rusting. Powered by Discourse, best viewed with JavaScript enabled, Brake lights don't work when headlights are on. 54cj3b. My 2008 Jeep Grand Cherokee's lights work fine when the day time running lights are on, but when I turn the headlights, the drivers side tail light, break light and turn signal do not work. 20 Report; Follow; Asked by Rj1121 Dec 21, 2011 at 07:46 PM about the 1999 Jeep Cherokee Limited 4-Door 4WD. I have seen people come up with a simple repair that can try. How Do Headlights Work? There are variations on this basic theme, like some vehicles have daytime running lights, adaptive headlights, or other little wrinkles like fog lights, but the idea is still the same. my surgestion is to turn on hazards and check lights flash if they do then turn of hazards and test brakes. Our brake lights dont work when head lights are on. The Hazards and the turn signals do not work. Join our community to discuss the Jeep Patriot & Jeep Compass. Forums. The brake light assembly on the Jeep … I’m inclined to think it’s the headlight stem but am hesitant to pull the steering column apart. The parking lights still don't work. When the light switch is in the off position, all the brake lights work … If the headlights are on, and one taillight is taken out, and you hit the brakes, the other taillight goes out in the back. When tow vehicle headlights are on, camper running lights and tail lights are on full time. I did that yesterday and the front turn signals didn't work, so this is something new, or possibly old, but was brought to light by the new changes. Thanks! Also - holy crap are those headlights bright when you look up and don't expect them to be shining in your face!! But they do when the parking lights and flashers are on. Problem: Brake lights do not work.Need help diagnosing the problem so I can pass vehicle inspection. Just no tail lights, parking lights or dash lights. So the average car owner can troubleshoot these faults with the use of a test light and, sometimes, a digital multimeter (DMM). When I turn the parking/headlights on, the lower brake light are on. When the headlights are on, no tail lights work, but the upper light is on, dimly. I've got an 05 tj and my turn signals, hazards and break lights are all not working. If the headlights are on, and you hit the brakes, all the rear lights go off, but the upper brake light stays on. I just repaired my brake light problem, using the instructions posted by gmusillo! However the dash, tail and parking lights still do not come on. Jeep Patriot. hope this helps 11-20-2009, 11:45 PM #8. JEFASOLD [OP] Member. Symptom: Parking light in dash stays lit after removing brake or doesn't light at all. Replace the bulb and try to reproduce the problem. Current test checks out except for at the light itself in aforesaid mode. All functions worked as expected before the LEDs were installed. What most likely happened is that one went bad before the other without noticing. The contact stated that when the headlights were turned on, the brake lights would not operate. Juice that should go through the brake lights is exiting the headlight circuit instead. Of course when we got it almost home it developed this strange problem with the lights. The Cherokee had been to the dealers twice and their repairs would only last for a while. brake light dont work when lights are on but when lights are off it works the left side..really pissing me off. Pry them up slightly and slide a small, folded piece of aluminum foil underneath it. Advanced Search Cancel Login / Join. When the headlights aren't on, they work fine. Since the brake light is LED, that rules out a filament issue. Unfortunately I dont have any info, other than maybe look into getting a service manual for the wiring. They come back on when the brake is released. We just bought a 2000 Jeep grand cherokee. Please help someone!! Most headlight systems are pretty straightforward and include a few basic components like the bulbs, a relay, a fuse, and a switch. If the turn signals or hazards are on and then the headlights are turned on, the lights stop blinking. The 3rd (High Mount) brake light works fine in either situation. Brake lights stop working when headlights turned on. Typical situation: a car is cruising along, headlights are turned on, tail lights are accordingly on. THANKS! I changed out the bulbs on both sides and it still exists. The headlights and tail lights are controlled by the same headlight switch, but the brake lights are on a totally different circuit. My 2008 Jeep Grand Cherokee's lights work fine when the day time running lights are on, but when I turn the headlights, the drivers side tail light, break light and turn signal do not work. Tail light bulbs usually have two filaments - one for the brakes and/or turn signals, and one for the running lights (dimmer lights when you have your headlights on). Page 1 of 2 1 2 Next > Aug 18, 2017 at 9:12 PM #1 #1. I agree with SteveF. Dan Ferrell (author) on March 28, 2019: It's possibly a bad relay, but there could be a loose connetion, or ground. or contact this number 09276429291 / (032) 5127262 I had this same problem years ago with a '72 Fiat. I've got a 99 WJ 4.0 with a brake light problem. Fuses are fine as are the bulbs. So it is odd when the turn signals work but the brake lights don't. There may be a few electrical problems, but the critical issue at hand is the brake lights. Post Reply. Now, brake light works while the lights are on and the fix took about 15 minutes to do and the cost $0. So, one set will still work while the other set might have some problems and don’t work. If there's a short, the wrong one might be lighting up, or applying the brakes may cause the power to flow from one to the other, making one go dim while the other stays off. Can You please help me to fix. All the other lights work fine, instrument, interior, brake, flashers, turn signals. 2012 Jeep Compass Latitude -- The brake lights work just fine when the parking/headlights are OFF. The brake lights were staying stuck on when my headlights were on, but now the top light is out as well. However, the issue is that when I turn the light switch to the first position, the right and left (not the 3rd center light) brake lights turn on as well as the running lights. Patriot Headlight Not Working / This burnt-out bulb does not affect the circuitry of the light system and it continues to function normally. Even tried switching bulbs to use the one that I knew was working on driver's side, but still wouldn't work on passenger side. So don't just check the brake light. The fix: Replace the bulb, switch, or relay. Again try the emergency-flashers to check for wiring, socket and lamp problems. The plunger does move out when the pedal is pushed. When I press the brakes when the headlights are not on, I hear a click there. No headlights, no brake lights, no running lights-only 4ways and blinkers. My turn signals work fine without day time lights on or auto lights turn on. Trailer Brake Lights Do Not Work when Headlights Are On Customer Service Order Tracking. When the filament inside the bulb breaks it cannot illuminate the gas enclosed within the glass cover. JEEP GRAND CHEROKEE. Symptom: Parking light in dash stays lit after removing brake or doesn't light at all. When the headlights are on, the brake lights, running lights, back-up lights all function as expected. Problem design is in the tail light assembly. The cause: A burned out bulb, or a problem with the high beam switch or relay. Would that still be the case if they were installed wrong? Tail and dash lights don't work on 96 Jeep Grand Cherokee after replacing faulty headlight switch? 06-01-2011, 03:39 PM #2. zatog. Tail lights could turn off for several reasons and they are almost similar to the causes why brake lights not working but tail lights are. Your 2000' Jeep Grand Cherokee brake lights don't work when the headtail lights are on They are fine when headtail lights are off Also when you step on the brakes it shuts off the tail lights? I have a 1971 jeep, on which we have just replaced all of the wiring, including putting in new LED tail/brake lights, and a new brake light pressure switch. If it does then clean the ground connection to the chassis. All new bulbs. I see that there's only one fuse control for both lights. When the headlights are on, I don’t hear the click–just silence. Joined: Aug 2, 2017 Member: … When I turn the parking/headlights on, the lower brake light are on. Use a circuit tester such as # 40376 to test the vehicle side trailer connector while someone steps on the brakes in the tow vehicle. 2000. Also, I forgot the $35 charge by the dealer. sprinkles08. Sponsored links. The rusting may also break the connection with the wire in the back. That would explain why they work with the headlights off and the battery voltage is closer to 12v. When you remove the light socket for the tail/brake light in the light assembly, you will see 3 silver contact points inside the black plastic ring. Again, if the headlights are off, brake lights work fine. THe headlight switch is plugged in all the way-everything was working one the way out to the beach to go fishing, then on the way back they stopped and it was day time so headlights were not needed. 2000 Jeep Grand Cherokee ) brake light are on full time are controlled by the dealer why do.... It started ) on but no brake lights do not work.Need help the! 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