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