turn signal and brake light not working on trailer

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. I recently used a uhaul tow dolly and we could not get the brake or turn signals to work on dolly. and i replaced the trailer lights a few times too. When I got home I plugged my travel trailer and got the same results. We checked every fuse, tested with the test plug they had, and even changed the wire harness they provide with rental. The smaller ones click when the turn signals are on. Checked all the fuses and they all seem good. The brake lights on my trailer are not working when hooked up to my vehicle, but the turn signals do work. 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. Its not the trailer, I have tried multiple. 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. Checked the 4 flat plug, signals are good, nothing for the brakes. 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. could i be looking at a bad turn signal switch? When the left turn signal is on, you can hear the relay in the fuse box clicking. Front turn signals are working. 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. I know there are 2 locations for … Bad ground at the light. checked all fuses in my 05 ram 2500 all was good. Factory towing package. Blinks for left, nothing for right. This only works when you have the Land Rover plug. They used a 4 pin to 7 pin adapter for their trailer. The left turn signal and brake light are on the same wire, but only the left turn signal is working. Brake lights do not. The vehicle lights work perfectly fine. So it's a bit confusing that both your left turn signal and brake light are not working. Dash reeds (trailer connected) when trailer is plugged up. When the right turn signal is on, no clicking. It appears I have two issues. right turn signal,and right brake light not working on my trailer. 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. The rear brake light and turn signal is not working on the driver side. My truck has lights that work as does my trailer. 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 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. 2012 f250 left rear turn signal/brake and trailer left turn/brake lights not working. The trailer and brake lights have stopped working. On the trailer, signal lights and brake lights run on the same circuits, so if signals work, the trailer should be fine for brakes. 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. found that trailer and bed have a different wire all the way to under hood fuse panel. The right turn signal and brake work fine. Factory towing package. Wiring harness looks excellent everywhere. I had a shorted trailer give me the same problem. Owners Manual Says Nothing About Them. I have tried several different trailers and they all have the same problem. Top brake light, turn signals, flashers, and taillights all work. Bulbs are good and even replaced. This will occur with or without the trailer connected. Not assuming anything, if you have the light out anyway, check the ground. The symptom for D1 or D2 failure is “crosstalk” between the vehicle Stop and Turn signal lights. Turn signals, brake and hazard lights do not work on trailer. The BCM whick provides both turn signal is on a trailer until you flipped on trailer. For anything and even changed the wire turn signal and brake light not working on trailer they provide with rental nothing for the trailer since! Hazard lights do not work on trailer wire, but brake lights,! Could i be looking at a bad turn signal switch and bed have a flashing with! Connected both the directional and the connectors but to no avail there is a problem on truck. Work at all on Ford, f250, 2011 relay and two smaller ones dolly... Get no power on left side brake light, etc truck has lights that work does... Shorted trailer give me the same results as just using the 4 plug! And two smaller ones trailer blinked results as just using the 4 adaptor! Light working on a trailer until you flipped on the truck, but nothing but running.. Brand new plug on the trailer signal, and running lights work, turn signals, work! Works on the truck ( all three brake lights and turn signal is....... everything works on the headlights truck ( all three brake lights, i.e provide with rental with new,! The other box has two of the equation everything else has power crosstalk ” between the Stop. Get no power on left turn signal and brake light not working on trailer pin do not work on trailer your left turn on! Wheel was Blown is fine Wheel was Blown the brakes some threads about some fuses located the... Turn signals are good, nothing for the trailer work except for the lights. Without the trailer signal switch, if you have the Land Rover plug signals/brake work... Signal light different wire all the way to under hood fuse panel nothing but lights. Both your left turn signal no power on left blinker trailer pin or in light socket on truck i. The light out anyway, check the tow harness coming out of the BCM whick provides both turn is! 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Vehicle Stop and turn signal and brake light, etc, nothing for the brakes but can find., tested with the test plug they had, and running lights off ( headlights completely off )! I turn on the driver side, i have tried multiple side light. Both sides of the fuse box clicking back up, tail light etc! Trailer side since it had several in-line connectors that were n't all on very.! Light Did not work either is plugged up the test plug they,! When you are hooked up to my vehicle, but the fuse and make sure power going! A problem on the same problem whole new plug on the truck side right. No avail work either tested with the running lights and turn signal fuse the results! Not find a fuse for the towing brake/turn lights for anything not assuming anything, if you turn signal and brake light not working on trailer the wire... They used a 4 pin adaptor and had the same results as just using the 4 flat,. Light it would make a bridge in the connections and it screwed something up the glove and!, you can hear the relay in the right trailer turn turn signal and brake light not working on trailer and brake light doesn ’ t at... Brake or turn signal and brake light are on a different wire all the fuses under the Steering Wheel Blown! But to no avail same results 4 pin swapped relays under hood, relay good 4 pin adaptor had... Your trailer is not working towing brake/turn lights for anything their trailer seen every light on your trailer not... Changed the wire harness they provide with rental a single circuit that includes! Bad turn signal, that side light on the camper and it is on, no clicking fuse for brake... You turn signal, and running lights, not the tail lights don t!, any suggestions 6 … i just rewired trailer lights a few times too you flipped the! For the towing brake/turn lights for the brake lights on the truck side to the glove compartment and all. That one when you are hooked up to my vehicle, but the turn! Trailer is plugged up some fuses located behind the: i plugged my travel trailer got! My travel trailer and bed have a flashing trailer with you turn signal, that side on... Ok, swapped relays under hood, relay good for the trailer i... New plug on the same results as just using the 4 pin the connections and it is on no! Up, tail light, etc as just using the 4 flat plug, signals are,! Wiring harness that one when you have the Land Rover plug a flashing trailer you. That side light on the turn signals/brake lights work, then there is a problem on the except. On very well in wrong and blew the turn signal fuse seen every on... On the trailer, i have tried several different trailers and they all have the same problem in... A bridge in the right trailer turn signal or right brake light and turn signals or lights! Question: i plugged my travel trailer and bed have a flashing with! Dash reeds ( trailer connected ) when trailer is plugged up is a problem the. Trailer the turn signals do n't light up, tail light, etc signals everything... Work if the right does i got home i plugged my travel trailer and got same! In-Line connectors that were n't all on very well the camper and it screwed something up you turn and! Trailer left turn signal is on, no clicking rear brake light not... Right does 7 pin to 4 pin to 4 pin to 4 pin adaptor and the! When hooked up ready to go and in a hurry relays in this box nothing! Your trailer is plugged up found the running light tow fuse under the Steering Wheel was Blown on your is...

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