I have replaced the bulbs and the connectors but to no avail. Trailer Brake and Turn Signals Not Working When 7-Way Connector Plugged into 2011 Ford F-150; Parts Needed to Add a 7-Way Trailer Connector to a 2008 Ford F-150; Running Lights Work But Brake Lights and Turn Signals Do Not Work on Coleman Camper; Trailer Lights Not Fully Working on a Trailer Towed by a 2007 Ford F-150 with Factory Tow Package Checked the 4 flat plug, signals are good, nothing for the brakes. Running lights work OK. They work fine on the truck, but nothing but running lights on dolly. I checked the trailer lights with my lights turned on and then with the hazard light and then individually with the signals, which all worked, but nothing with the brakes. I read some threads about some fuses located behind the … Bulbs are good and even replaced. It appears I have two issues. Owners Manual Says Nothing About Them. ... You need to check the tow harness coming out of the BCM whick provides both turn signal and brake lights for the trailer. However, connect the two and the trailer brake and turn signals don't work. On the trailer, signal lights and brake lights run on the same circuits, so if signals work, the trailer should be fine for brakes. Every light works on the truck. Left turn, back up, tail light, etc. I verified this by testing the trailer harness under the cab with a test light. 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. Checked the harness where the kit plugs in and there's two spots that don't light up, everything else has power. There is now no power to the trailer plug for the right turn signal only, everything else is fine left turn signal works, right turn signal and right brake dont work on trailer only, works fine on truck. They used a 4 pin to 7 pin adapter for their trailer. I Had No Idea There Were Fuse Under There. When I hooked up a different trailer the turn signals/brake lights work but not the tail lights. checked fuse in right kick panel ok, swapped relays under hood, relay good. I assume you have no problem shifting out of park or you would have mentioned it, which tells me the brake light switch is functioning properly. I have checked all of the fuses under the hood and next to the glove compartment and they are all O.K. The smaller ones click when the turn signals are on. signals work and tail lights work, then there is a problem on the truck side of the equation. So it's a bit confusing that both your left turn signal and brake light are not working. When I got home I plugged my travel trailer and got the same results. Turn signals and brake lights don't work. Turn signals, brake and hazard lights do not work on trailer. When the left turn signal is on, you can hear the relay in the fuse box clicking. All lights work on truck. I just rewired trailer lights from scratch. also checked with new bulbs, any suggestions 6 … checked fuse in right kick panel ok, swapped relays under hood, relay good. Answer: Check both sides of the fuse and make sure power is going through. Factory installed tow controller. The right turn signal and right brake light are not working on any of my trailers when hooked up to my 2005 Titan Crew Cab LE 4x4. so i only have one brake light now. The left turn signal on my vehicle operates BOTH left and right turn signals very dimly for some reason. 2012 f250 left rear turn signal/brake and trailer left turn/brake lights not working. 2012 f250 left rear turn signal/brake and trailer left turn/brake lights not working. I have checked every fuse up front that was labeled TRL. Bad ground at the light. This is not the case in every car, so check a wiring diagram to see if the wires go through the turn signal switch. It worked at first but at some point during the day the turn signals and brake lights quite working. The left brake light doesn’t work at all. If you don't have a flashing trailer with you turn signal, that side light on your trailer is not flashing too. All have continuity. Factory towing package. Try finding that one when you are hooked up ready to go and in a hurry. Turn signals, brake and hazard lights do not work on trailer. I have seen every light working on a trailer until you flipped on the turn signal and then every light on the trailer blinked. Actually, on a trailer plug, wires for the brake lights and the turn signals may have been connected together, not unusual, as many trailers do not have separate lights for brakes and turn signals. right turn signal,and right brake light not working on my trailer. Everything works correctly on the truck (all three brake lights). Not assuming anything, if you have the light out anyway, check the ground. The right turn signal and brake work fine. If all the lights on the trailer work except for the brake lights, i.e. Checked all the fuses and they all seem good. The other box has two of the large relays. We did check fuses. Running lights and tail lights on the trailer work fine. I recently used a uhaul tow dolly and we could not get the brake or turn signals to work on dolly. i cant remember why becasue i did it a couple months ago but i had an issue making the right brake lights work with the trailer harness. In some vehicles, the brake light switch is powered through a single circuit that also includes the turn signal light. Found the running light tow fuse under the hood but cannot find a fuse for the towing brake/turn lights for anything. 03/07/2011 by mayer Tail lights don’t light at all when I turn on the headlights. When the right turn signal is on, no clicking. Trailer brake and blinker on left side pin do not work either. I tried a 7 pin to 4 pin adaptor and had the same results as just using the 4 pin. Got out of the truck and did not have any tail lights, brake lights,turn signals on the rear of the truck. There was a short in the right trailer turn signal. One next to firewall has a large relay and two smaller ones. I have tried several different trailers and they all have the same problem. thats what i thought too. checked all fuses in my 05 ram 2500 all was good. Blinks for left, nothing for right. could i be looking at a bad turn signal switch? The trailer wiring isn't the problem. Front left blinks fast. Ford, F250, 2011. Now my lower brake lights do not work, but the fuse is good. The trailer and brake lights have stopped working. It is on a flat four pin wiring harness. My open trailer has the simple 4way wiring but only the running lights are working, not the turn signals or brake lights. Brake lights do not. I checked the bulb on the camper and it is fine. No trailer brake or turn signal on Ford, F250, 2011. The symptom for D1 or D2 failure is “crosstalk” between the vehicle Stop and Turn signal lights. Checked bulbs all were ok. Cause? If the blinker is working on the truck then fuse is good, this sounds like a bad bulb or connection to the light, the brake and signal use the same filement in the bulb. The boat trailer has its own issue that I will need to sort out, but the 4Runner has an issue with the tail light circuit. Fuses under dash check good. Wiring harness looks excellent everywhere. Trailer Left Turn Signal/left brake light not working. Running lights work, turn signals work, flashers work. Left rear blinker and brake light not working. Front turn signals are working. No blown fuses that state they have anything to do with the trailer Have you checked this with the running lights off (headlights completely off?) Dash reeds (trailer connected) when trailer is plugged up. One Of The Fuses Under The Steering Wheel Was Blown. Its not the trailer, I have tried multiple. when i connected both the directional and the brake light it would make a bridge in the connections and it screwed something up. Checked sockets with test light and turn signal seemed to be working, the tail lights seemed to be working, brake lights seem to be working. I checked the fuses and they are fine as well. The vehicle lights work perfectly fine. We checked every fuse, tested with the test plug they had, and even changed the wire harness they provide with rental. I had a shorted trailer give me the same problem. Running lines and trailer brakes work, but brake lights and turn signals do not. Under the hood are two boxes. Top brake light, turn signals, flashers, and taillights all work. and i replaced the trailer lights a few times too. This only works when you have the Land Rover plug. Question: I plugged a 7 way trailer connector in wrong and blew the turn signal fuse. Still doesn't work. The signals work but I've got no brake lights or daytime running lights. The right signal and brake work fine on the truck so I checked to see if I was getting anything at the plug and there is nothing at the plug for right turn signal and right brake. This will occur with or without the trailer connected. Does anyone know if the brake/turn fuse for towing is in the same location on a 2011 pathfinder. The turn signals may still work properly, but the electric signal from the brake light switch passes through the turn signal switch (also called a combination switch) before it goes to the brake lights. Changed all relays in this box still nothing at plug. I also put and brand new plug on the truck side. The brake lights on my trailer are not working when hooked up to my vehicle, but the turn signals do work. 2011 F-150 Platinum. Trailer light in dash What the trailer light in the dash is telling you is that when you have a trailer plugged into your vehicle that the trailer's turn signal is working too. found that trailer and bed have a diff … read more I put a whole new plug on the trailer side since it had several in-line connectors that weren't all on very well. I get no power on left blinker trailer pin or in light socket on truck. Factory towing package. I could maybe see just the signal not working, but the left brake should work if the right does. found that trailer and bed have a different wire all the way to under hood fuse panel. Hazards, Brakes, Running Lights, Turn Signals... Everything works on the trailer except the left side brake light. All lights work on truck. I know there are 2 locations for … In other words, when the brake pedal is pressed, both Turn signal and Stop signals light simultaneously; or when the Turn signal is activated, both Turn and Stop signals light simultaneously. The left turn signal and brake light are on the same wire, but only the left turn signal is working. Dash reeds (trailer connected) when trailer is plugged up. I noticed I had no right turn signal or right brake light on my camper today. No trailer brake or turn signal on Ford, F250, 2011. 9 Answers. When I take my electronic key and unlock the truck the driver rear lights will not light up but when I lock the doors it does light up in the back. Better safe than sorry. The trailer/camper brake/turn signal on the passenger side isn't working. My truck has lights that work as does my trailer. 9 Answers. The rear brake light and turn signal is not working on the driver side. Trailer Left Turn Signal And Brake Light Did Not Work. Ford, F250, 2011. What do I check first? I checked at the plug and get nothing from there except brake, charge, and running lights. Has power, f250, 2011 quite working have replaced the trailer side since it had in-line. 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