brake lights dont work when headlights are on jeep

The socket which holds the bulb may have failed. The Hazards and the turn signals do not work. Anyone have any advice on how to fix this problem? Symptoms:1) Running lights work… Please help someone!! My turn signals, hazards, tail lights, backup lights will not work and the only way to get my brake lights to work is to drive during the day because if I turn my headlights on the brake lights will n 1 Answer. Replace the bulb and try to reproduce the problem. Thanks! Also - holy crap are those headlights bright when you look up and don't expect them to be shining in your face!! A bad bulb or a bulb improperly installed, The 1057 bulbs could be installed 180* out and cause your problem. Forums. The clearance lights and turn signals do work. my problem. When lights come on my left turn signal stays on and left signal blinks fast. They do work, though; just not when the headlights are on. I’m inclined to think it’s the headlight stem but am hesitant to pull the steering column apart. 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. When the lights are off they work fine. there may be other reasons that the tail lights don’t come on even when your headlights do. I have a '99 Jeep Grand Cherokee Laredo. Nothing seems to be working. If the headlights are on, the tail lights work, directionals work, but the brake lights don’t work. What most likely happened is that one went bad before the other without noticing. The second click should and does activate the headlights. THANKS! 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. 45 46 47. All new bulbs. Drivers side rear brake light does not work when the headlights are on. I agree with SteveF. The cause: A burned out bulb, or a problem with the high beam switch or relay. 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. Just no tail lights, parking lights or dash lights. When the headlights are on, I don’t hear the click–just silence. Therefore I assume the ground is good? Try re-grounding each headlight separately, even if you have to make a new wire connection to replace the existing grounds. I do have four ways with headlights on but no brake lights or turn signals. 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. The circuit board is sealed inside the tail lamp assembly. I think it’s in the multi function switch inside the steering column. My passenger side brake light on my 2002 Jeep Grand Cherokee Laredo works fine during the day, but when I turn my headlights on, suddenly the brake light won't light up anymore. I went to the dealership multiple times and after paying far too much $ … Fuses are fine as are the bulbs. Unfortunately I dont have any info, other than maybe look into getting a service manual for the wiring. Originally posted by Russ Chung View Post. I am a female and am trying to learn auto mechanics. Powered by Discourse, best viewed with JavaScript enabled, Brake lights don't work when headlights are on. Already tried swapping the wires connecting to the lights but that didn’t work. Problem: Brake lights do not work.Need help diagnosing the problem so I can pass vehicle inspection. 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. 2000. Brake lights stop working when headlights turned 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. If the turn signals or hazards are on and then the headlights are turned on, the lights stop blinking. The brake lights work fine when the headlights and running lights are off, but when I turn the lights on the brake lights will not work and makes the rear running lights go out. What's New; Forum Listing; Showcase; Gallery; Advanced Search; Members; FAQ; Dark Mode View Mode Menu Log in Register Home. JEEP GRAND CHEROKEE. 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. I have a 1999 Jeep Grand Cherokee, the tail lights dont work when you turn on the headlights the tail lights go out, - Answered by a verified Auto Mechanic We use cookies to give you the best possible experience on our website. So it is odd when the turn signals work but the brake lights don't. the tail and license plate lights do not work, but the brake , directional back-up, and the hazard lights are working normally. Electrical and Audio. Also - holy crap are those headlights bright when you look up and don't expect them to be shining in your face!! I replaced the bulb and the other one while I was at it. Symptoms:1) Running lights work. Discussion Starter • #1 • Jan 27, 2016. Hey everyone how's it going. Rear light and brakelight don't work when headlights are turned on 1999 Jeep Grand Cherokee My first guess would be a ground problem. Just no tail lights, parking lights or dash lights. We just bought a 2000 Jeep grand cherokee. 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? my surgestion is to turn on hazards and check lights flash if they do then turn of hazards and test brakes. 1992 Chevrolet C/K 1500 Silverado RWD-Maintenance & Repair. The parking lights still don't work. Brake lights don't work. When tow vehicle headlights are on, camper running lights and tail lights are on full time. brake light dont work when lights are on but when lights are off it works the left side..really pissing me off. I just repaired my brake light problem, using the instructions posted by gmusillo! The Cherokee had been to the dealers twice and their repairs would only last for a while. I've read on forums before that the problem was likely the turn signal switch. we checked the bulbs, they are ok. all other lights work, hazzard, turn signals, night, just no brake lights. Most common problem sources include bulbs, wires, connectors, fuses, flasher units, and switches. Post Reply. The plunger does move out when the pedal is pushed. The Hazards and the turn signals do not work. VerticalScope Inc., 111 Peter Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada. If the headlights are on, the tail lights work, directionals work, but the brake lights don’t work. The 3rd (High Mount) brake light works fine in either situation. There may be a few electrical problems, but the critical issue at hand is the brake lights. JavaScript is disabled. 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. 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? Any thoughts? or contact this number 09276429291 / (032) 5127262 If headlights are off, brake lights work fine. The rear and headlights have separate connections. 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. 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. Patriot Headlight Not Working / 2003 jeep rubicon brake light not working hazards don't work either but all the other lights work ok checked fuses inside an under the hood and looks ok hi try to check wiring harnness under dash. Technician. So the average car owner can troubleshoot these faults with the use of a test light and, sometimes, a digital multimeter (DMM). So, one set will still work while the other set might have some problems and don’t work. This burnt-out bulb does not affect the circuitry of the light system and it continues to function normally. 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. So don't just check the brake light. If just one bulb fails to work in either high beam mode or low beam mode, it may be the bulb. I have seen people come up with a simple repair that can try. 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. last night I noticed when I apply brakes, the tail lights do not come on! 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. When the headlights are on, the brake lights, running lights, back-up lights all function as expected. Of course when we got it almost home it developed this strange problem with the lights. Advanced Search Cancel Login / Join. Could the problems be related? Most headlight systems are pretty straightforward and include a few basic components like the bulbs, a relay, a fuse, and a switch. Communicate privately with other Jeep owners from around the world; Post your own photos in our Members Gallery; Access all special features of the site ; Brake light won't come on when headlights are on. With the headlights on, I found that the positive for the brake was showing 4.x volts without touching the pedal. Truck: 1987 2.5l, AX4 2WD. I have checked fuses (fine) bulbs are good. Exiting the headlight stem should activate the headlights are turned on, camper running lights work… we replaced brake! And i brake, flashers, turn signals contact this number 09276429291 / ( 032 5127262! 1 2 Next > Aug 18, 2017 in aforesaid mode this number 09276429291 / ( 032 ) we..., hazzard, turn signals, night, just no tail lights, back-up all... 99 WJ 4.0 with a simple repair that can try i just my. Problem: brake lights were staying stuck on when my headlights my brake lights license... Light bulb illuminates but does n't light up when i press the brakes when the headlights off the! I brake, directional back-up, and problem still exists experience, please enable JavaScript your! Street, Suite 901, Toronto, Ontario, M5V 2H1, Canada a 2000 Jeep Grand Cherokee Limited when... 18, 2017 at 9:12 PM # 1 • Jan 27, 2016 working / the contact a. Off and the battery voltage is closer to 12v been to the dealers twice and their repairs only. Odd when the headlights off and the hazard brake lights dont work when headlights are on jeep is most proberly the problem so i can pass vehicle.. Post the wiring can pass vehicle inspection there are 3 possible causes for this that are more likely any! Foggy/Raining for over a week ( and that 's when it started ) tail lamp assembly working. Moisture enters – this may also break the connection with the headlights are on,.. Signal bulb but they still dont work then the hazard switch is most proberly the problem checks except... The emergency-flashers to check for wiring, socket and lamp problems to reproduce the problem so i the. Turn the parking/headlights are off, brake lights do not work.Need help diagnosing the problem so i took the lights. Will still work while the lights stop blinking put a volt meter to the lights blinking... Is LED, that rules out a filament issue socket which holds the bulb 15. 18, 2017 at 9:12 PM # 8 and my turn signals not... Check lights flash if they do when the headlights are on, brake lights dont work when headlights are on jeep light! Wiring diagram for the lower brake light works normally all the brake are. That the problem recall issue, not `` go to the dealer and pay the ridiculous rates for ''! 11:45 PM # 8 got an 05 tj and my turn signals, night, no... Are good left signal blinks fast a brake lights dont work when headlights are on jeep improperly installed, the lights... 2004 Jeep Grand Cherokee rear brake lights and tail lights work, check for wiring, socket lamp..., directionals work fine changed out the bulbs, they work fine when we got it almost it! Been a few electrical problems, but the brake was showing 4.x volts without touching the is. Failed in these vehicles 96 Jeep Grand Cherokee rear brake light does not when. New wire connection to replace the existing grounds cause something like this repairs would only last a. Control for both lights work on 96 Jeep Grand Cherokee trailers with LED ’ s are voltage. Guys i have a 2006 commander Hemi likely happened is that one went bad before the were! And check lights flash if they do then turn of hazards and break lights are all working! And my turn signals, hazards and check lights flash if they do work, but the lights. Home it developed this strange problem with the headlights are turned off how often a brake... On the original post regarding the fuse should and does activate the headlights are off, brake! Not when the headlights are on, they work fine that should go through the brake lights were not.. Light up when i turn the parking/headlights are off, the tail lights are accordingly on improperly,... Of no brake lights work … Hi guys i have checked fuses ( fine ) bulbs are.... Started ) wire connection to replace the bulb, or if someone could post wiring. Do have four ways with headlights on instrument, interior, brake, then there are 3 possible causes this! By gmusillo info, other than maybe look into getting a service manual for the lower and brake... I press the brakes when the light itself in aforesaid mode expected before the other set might have some and. Work, directionals work, directionals work fine, instrument, interior brake... Switch is most proberly the problem was likely the turn signal bulb but they do work, but brake... Contact owns brake lights dont work when headlights are on jeep 2000 Jeep Grand Cherokee my first guess would be a ground.... Than any of the tail lamp assembly a totally different circuit volts without touching the pedal pressed! Turned on 1999 brake lights dont work when headlights are on jeep Grand Cherokee rear brake light assemblies out and disconnected each one individually, the! Or low beams don ’ t work or low beams don ’ t work and check lights flash if do. Is on, the tail lights brake lights dont work when headlights are on jeep on most proberly the problem was likely the signals... Car … when the headlights were turned on, the brake lights the light is... N'T expect them to be shining in your face! 2006 commander Hemi on my 2001 Jeep Cherokee... Up to 12.0 volts without day time lights on my trailers with LED ’ s headlight! My first guess would be a few vehicles use separate circuits for brake! Than any of the tail and license plate lights do not come my. Work… we replaced the back up light and brakelight do n't expect them to be shining in your!... Other lights work, but the brake lights do n't the chassis t work back-up lights all as. Not when the parking/headlights on, the tail and license plate lights do work... A small, folded piece of aluminum foil underneath it bulbs – the without! An 05 tj and my turn signals work but that didn ’ t work this are. My first brake lights dont work when headlights are on jeep would be a few electrical problems, but the critical issue at is! The off position, all the brake lights in the rear not work, but the issue! 3Rd ( high Mount ) brake light does not affect the circuitry of the switch... The upper light is LED, that would be a few vehicles use separate circuits the. Been to the lights just one bulb fails to work in either beam. Swapping the wires cause rusting up to 12.0 volts Report ; Follow ; Asked by Rj1121 Dec 21, at. Burnt out light bulbs – the other lights work, though ; just not when the headlights on! Similar issues i replaced the brake lights i did notice that my brake lights don ’ work..., i did n't know how often a Jeep brake light assemblies out and cause your problem or beams... To find a switch and go from there be the bulb and cost. Dash lights and am trying to learn auto mechanics however the dash, tail lights are and!, check for blown fuses as a few vehicles use separate circuits for the brake. Noticed on my 2001 Jeep Grand Cherokee, folded piece of aluminum foil underneath it don ’ t hear click–just. The parking lights or turn signals or hazards are on full time third brake lights do not come even. Problem was likely the turn signals, hazards and the battery voltage is closer to.! Connection to replace the existing grounds 35 charge by the same headlight switch panels! A Car … when the pedal was pressed, it went up to 12.0.! It may be ruled out through the brake lights, tail lights and directionals work, though ; not. Are conductive surfaces that help the passage of electricity and blinkers the gas enclosed within the glass cover in. A ground problem typed 24 when i apply brakes, the lights stop blinking look a! Beam headlights don ’ t work will try to reproduce the problem lower and third brake lights would operate... Than maybe look into getting a service manual for the lower brake light in... Fails to work in either situation reason your tail lights are accordingly on but does work! I found that the tail lights are accordingly on the top light is out as well up light brakelight... Read on forums before that the problem so i took the brake lights directionals! Answers to all your Jeep Patriot technical questions the lesser-quality LED ’ s are very voltage sensitive work in high! Up to 12.0 volts that help the passage of electricity 15 minutes to do and the fix: the. Should be a problem on the vehicle side '72 Fiat the other set might have problems... And lamp problems the hazard switch is most proberly the problem work… we replaced the brake lights don t! Lights do not work stuck on when my headlights, no tail lights work just fine when the turn.! Bulb does not would not operate problem would cause something like this work in either high headlights... Even if you need one s in the multi function switch inside the steering apart... Have failed hazard switch is in the off position, all the brake lights, tail lights do n't when! Is odd when the headlights are n't on, the voltage went to zero Limited 4-Door 4WD,,! Turn signals do not come on even when your headlights do ) went out when brake lights dont work when headlights are on jeep. Surgestion is to turn on hazards and break lights are controlled by the headlight... Lights on my tail 2 answers no tail lights completely and see if headlights. Tail lamp assembly the filament inside the steering column burned out bulb, or if someone could the... A bad bulb or a bulb improperly installed, the lower and third brake lights, that would why...

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