The running light was working when I bought the bike. the brake light above the cab works, the parking lights work, and the reverse lights work. I have tried several different trailers and they all … A bad ground wire is the most common cause of turn signals and brake lights not working. The middle run light is working,(the tiny one) I did not test the reverse light. If you flip on your turn signal and the indicator light blinks faster than normal, or if you can see that the turn signal does not come on, you have a problem. When I turn on the lights it lights up like the brake is onand stays on all the time until I turn off lights. On my 2011 jk Rubicon I have a problem with the driver side tail light. While in the process of troubleshooting, I noticed that my left rear brake light stopped working as well. I have a 2007 ram 1500 mega cab. I believe one bulb controls both of them. My left rear turn signals stopped working recently so I did the easy thing first and replaced the bulbs. now for the brake light issue. The left turn signal and brake light are on the same wire, but only the left turn signal is working. Turn your flashers on to check the bulbs .Checks good go to your brake light switch mounted on upper part of the brake pedal with a simple test light you should have hot (test light on) when the brake pedal is depressed if not and the ong wire is hot (15 amp fuse in the fuse panel under dash) says STOP by it you need to replace the brake light switch. Factory installed tow controller. Question: I plugged a 7 way trailer connector in wrong and blew the turn signal fuse. Tried changing bulbs and fuses. when one turn signal works and one doesn't it is usually the tail light contacts or the turn signal switch. Meaning that when you press the switch to turn left (or right) none of turn signals on one side don’t work. We did check fuses. Difficulty Level - 4. Only one of the switch terminals should turn on the test light. Turn on the parking lights and first one side of the turn signals and then the other. The tail lights work but not the turn signal. I once had a 1988 C1500 and one day that happend to me. When one of my turn signals burn out my turn signal light in the dashboard blinks a lot faster and makes a fast clicking noise. I used a test lamp. Running lights work OK. OK, not sure how it is on other Chevy vehicles but I have a 2002 Chevy S10. Left rear blinker and brake light not working. 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. I checked the fuses, they appear to be fine. If the switch is bad, not only can the turn & flashers quit but the L & R brake lights can be affected. My left turn signals are not working (front or back) and my right ones are fine. But i'll check it. 21 Answers. Then check the brake light switch on the bake pedal arm. I checked all the fuses and none are blown. Also my left brake light is not working. The L & R brake light circuits go through the switch since the rear signals operate by blinking the brake light on the side that is signaling (& both for the flashers). First, disconnect the trailer from the tow vehicle so you can check the vehicle side connector. Most common problem sources include bulbs, wires, connectors, fuses, flasher units, and switches. Front left blinks fast. The trailer/camper brake/turn signal on the passenger side isn't working. Turns light doesn’t stay on. Now my lower brake lights do not … I noticed that the brake light and turn signal are not working on the right side. Problem: Turn signals on one side (left or right) of the car are not working. 2011 f150 left rear turn signal/brake light not working. Trailer brake and blinker on left side pin do not work either. Trailer brake and blinker on left side pin do not work either. This made no difference. Check fuses and then start replacing the bulbs one by one. Just happened. I believe a fuse may have blown out. Brake fluid - Answered by a verified Ford Mechanic 21 Answers. Sometimes this varies and the turn signals and brake lights come on very dimly. I have a 1997 Chevy c1500 truck. I have not modified anything with the wiring backe there and I do not see anything wrong with it. ... Find the wire that connects the brake light and the turn signal switch and replace it. … Back probe the switch terminals with a test light. Front left blinks fast. When I bought my bike about two months ago the rear brake light was not working. I may have been too rough removing the turn signal bulb I am unsure. Factory installed tow controller. Why Your Brake Lights Are Not Working, But the Tail Lights Are. Need help. The trailer wiring isn't the problem. Driver side tail light problem I am new here but been reading forums about my issue. I've eliminated everything on the trailer. I tried replacing the bulb, but a new bulb did not work. The left front flashes rapidly and the right side signals work so I figure it's not the flasher unit. Brake lights work normally, but the turn signals flash very quickly. I am assuming since the one light turns on that there isn't a wiring problem or a short. My rear parking lights and the right side turn signal worked at this point in the circuit. Begin with the vehicle on level ground, in park with the engine "OFF". Well, what i found was there is a switch up at the top of the brake pedel arm. The first half of the guide will troubleshoot one brake light that is not working while the second half with troubleshoot all or the lower two brake lights. My hazards switch has been unworking since I got the vehicle 2 years ago (1995 chevy s10) so I can't test the lights that way. Every light works on the truck. My left turn signal and left brake light are not working on my trailer. When I go to signal a left turn, the interior blinking light comes on and stays on (does not blink). If the front one works then usually the switch is working so verify the contacts for the light that is not working are all good. I have checked the bulbs an dthey work fine. To determine exactly what the problem is, you'll have to troubleshoot. Its a great truck but yesterday I encountered a problem where the rear turn signals and brake lights do not work. It controls all the lights. Left rear blinker and brake light not working. Turn signal problems and diagnosis can get confusing, especially when a system shares wires and connections with the parking, warning, and braking light systems.. any one got any suggestions? Running lights work OK. (About 15% of the time) OR... 3. -64 Dart one side brake light and turn signal not working.-Running lights were fine (it's a dual filament bulb)-First thought was bulb. all fuses are good, all bulbs are new and correct, traced the wiring and nothing is grounding out from what I can see. Everything else - both running lights, right brake, right signal, works. The turn signal switch doesn’t engage to keep the left or right turn signal … Once again use the multimeter to test the various sockets, or use a test lamp. rear turn signal and brakes not working so my brake lights and turn signals are not working. 2. So the average car owner can troubleshoot these faults with the use of a test light and, sometimes, a digital multimeter (DMM). As of today when I went out to start it neither the running light or brake light are working. I have the wiring diagram on .PDF but I cannot understand it. I just did some more research and found it might be the fuse, but there is only one large 'brake relay fuse' im guessing this controls both break lights? Brake Light Not Working After Replacing the Bulb. 2- Left or Right Turn signals not working. F-250 Super left rear blinker and brake light not working. You're going to need a test light and check the turn signal wire at the rear brake light … Need help. The brake lights staying on. This is where some testing and observation is needed to repair a bad connection or broken wire. It burned one bulb and started melting the plastic where the contacts are. The brake lights and taillights are often comprised of one light bulb, but they work differently. The bulb is not at issue, as the light comes on just fine when I turn on my headlights. Easy step by step guide on how to repair an automotive turn signal system that is not working, this information is presented in the order of probability and pertains to most vehicles. I've used a multimeter and discovered that there is no power getting to the green wire(3oclock position) on the auxilery plug on the back of the truck - with a driver actuating the brake or turn signal of course. Hazards, Brakes, Running Lights, Turn Signals... Everything works on the trailer except the left side brake light. Turn signals do not flash at all, both directional indicators on the dash come on dimly when the brake is pressed, and the brake lights do not work. I put new bulb in and that did not fix anything. Brake and turn signal not working on left side. First for the turn signal and rear brake lights the Smart Junction Box is more than likely bad. I have a 2007 Chevy Express with the same problem. Using a circuit tester like part # 40376, test the functions of the connector; specifically check the right turn/brake, to make sure the signal is making it to the connector.If it is not working at the connector, there might be a fuse blown or missing in the power distribution box under the hood. Discovered Bulb was good.-Second thought was the turn signal switch since as others have pointed out power runs through it. Answer: If all the brake lights were working before, there's a wire that is not making contact. F-250 Super left rear blinker and brake light not working. Fuses good, bulbs good (dual element lamp, turn signal and break are same element) running lights work (other element) Relay blinks fast and not getting voltage at light for blinker or brake. Which alerts me when one of the bulbs needs replaced. Im not sure about the turn signal issue. Put the truck in reverse. 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