Hi Guys, My center high mounted stop light or third brake light is not working. But the side rear lights do not illuminate more when I press the brakes. The other brake lights work all the time. The third (upper) brake light is working. I checked the two metal strips that send power to bulbs and found the positive side was open. My third brake light does not work. I could not figure out which fuses are apart of the side brakes using the I hooked up a voltage meter to the electrical connections going to the light and had no voltage. All the rear bulbs are working as I tested all of them (turning night time lights on, turning on hazards, etc.). just last saturday nght i got a LAMP defective warning on dash then i checked all lamps then found out that the 3rd brake lamp aint working . brake lights not working, upper light works? When I applied the brakes, it would blink for about 5 seconds and then stay on. I changed the bulbs only to find out it still didn't work. luck was on your side, my 2008's 3rd brake stopped working. Started with a plan to replace the light. Third brake light not working - Answered by a verified Cadillac Mechanic We use cookies to give you the best possible experience on our website. The wiring diagram in my Chiltons shows there to be a fuse specifically for that third light but it fails to tell me where that fuse is located in the chassi. I'm having the same issue with my 2001 Yukon XL 1500 SLT. I have an 2005 GMC Envoy and the brake lights have quit working but the third brake light does. The two side ones work, just the middle light. Third light bulb was burnt out, replaced with a new one, and it doesn’t work. Any help would be MUCH appreciated! CarTalk.com Best of Deals Car Reviews Repair Shops Cars A-Z Radio Show. Messages: 3 Likes Received: 0 Joined: Nov 8, 2016 Location: Massachusetts. All other lights work. The BPP (brake pedal position) sensor takes the place of a simple and effective switch. most cars do not even have a third brake light — and the two main brake lights are in proper working order, so why is this an offense?” A: The citation is legitimate, California Highway Patrol Lt. Aug 21 2013, 5:30pm. A bad brake switch is a really common problem when your brake lights are not working. That could be the BPP and not the light. Seems the flared side of the rivet was not making contact with the metal strip. It drives me bonkers unti it's fixed. I have searched this forum to no avail. Here are two links. I checked the bulbs and fuses and they are ok. All other lights work. But thankfully as the taillights run on their isolated circuit there should not be any problem to track the issues. Replace third light. I'm taking that the blinking is part of the function of the light. I've seen this switch knocked out of place before or even broken. but when i shut off engine and started it again the warning went off but still the lamp is not working. Break fluid affects 3rd break light. Disassembled everything IAW the posts on this form to get the rear deck and light on the bench. That way the computer can decide if it needs to turn the brake lights on or off. not the whole box, just the one slot for the 3rd brake light … If not, I have another problem to fix. Just had brakes replaced. HOLY S---. The BPP tells the BCM (computer, or Body Control Module) what position the brake pedal is in, how fast it's moving, and in which direction. 1 Answer. i was told my third brake light wasnt working so i checked the fuses but that doesnt seem to work and tried to open the casing but it doesnt seem to want to open any ideas . I replaced the whole light assembly and still nothing, the problem ended being the fuse slot in the main box under the hood went bad. Tested the light with a 12 volt source and it worked. Got a 1991 Honda Accord with the 3rd Brake Light not coming on when brake pedal is pressed. where does the light … i cant figure out why, I looked at the fuses on the side of the dash (where all the fuses are) but the one for it is also the same fuse for like 10-12 other things and they all work so I was at a lose. Both brake lights come when the brake pedal is pressed so it would seem the brake light switch is in fact still good. DID NOT HAVE CURRENT. I have an annoying problem with the third/LED brake light on my Dodge Charger 2006 (5.7l), it won't work. Other things use that ground when the key is on so its not strong enough then to activate the armature within the relay. 3rd Brake light not working. Replacement of the Third Brake Light on a 2007 Toyota Avalon what could be wrong with my 3rd brake light? You can test the brake light switch with a multimeter to make sure the pins get connection/0 ohm when you are pressing or releasing the switch. Third Brake Light NOT WORKING! Assuming you have already replaced the bulbs, there is a switch that the brake pedal touches when depressed that activates the lights. I checked the following fuses for current: *Interior fuses "12" Stoplamps, Center-High Mounted Stoplamp (WORKED FINE. The light originally flashing when I braked and had the turn indicator on.Now it does not work at all.Since my cruise control does not work along with the third light I replaced the brake light switch on the brake pedal as suggested in multiple threads. Jeep Liberty 2006 Ltd. Rear brake lights are not working. Third brake light works but bitge other brake lights do not. Fuse and bulbs are good. I removed the 3rd brake light cover and tested for voltage at the steel center of the two rivets and found the positive (driver side) negative (passenger side) were good. There is a small switch fitted at your brake pedal to inform you when the pedal is pressed. Anyone know what the resolution to this thread was? 11 Answers. Also can’t get the brake light to turn off on my dash. -They have taken assembly apart, cleaned, and reassembled.-They have replaced the third brake light assembly.-They put a different type of bulb in the last time with a lower draw, which worked for a couple of hours This is a quick video I made to help people with their brake light problem this video will work for any car the has combined brake light and signal light. TIA Re: third brake light problem. Is - Answered by a verified Dodge Mechanic Hey guys my third brake light … Thats funny I just found out 3 days ago my 3rd brake light it not working anymore. It worked when I purchased it. The third brake light (center brake light on the trunk lid) is NOT working now. ive checked the bulb changed it with a new one checked all fuses everything is ok. IT GOT CURRENT) *Exterior Under the hood "49" Center High-Mounted Stoplamp 'CHMSL' (DID NOT WORK. Nov 8, 2016 at 1:32 PM #1. imbatman220 New Member. It seems in the morning (first cold start) it works when I depress the brake (I can see it light up the rear window). it has been back to dealer for the fifth time (I think) and still not working. use a voltmeter and see if you have power. Third break light not working is there a fuse for it. An update on the brake light issue. I have a 2008 Honda Civic and the 3rd brake light is having an issue. I noticed the third brake light is not working. Jim, common problem. The side brake lights work, but not the one on the top. Adding this third light captures the line of sight of the drivers following the car, as opposed to the use of just two lights, making the braking reaction faster. One on the top tracking the causes why tail lights not working is there a fuse it. It worked i think ) and still the same, it did n't work works... 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