rear led taillights

Robert,

There are a few pretty savy guys on here for electricky problems but it might be an idea if you gave a little more detail like what are the led lights fitted to and did the drama start because of the fitting or have they been working for a while and just stopped.


Cheers
Pop

Robert the headlight fuse should also control the tail lights on the vehicle. If the headlights and front parking lights are working, you might have a break in the wiring down the back where the trailer wiring meets the vehicle harness. Wiggle the wires in this area and see if they come on.

Are you talking about a trailer or caravan. If a van or trailer, have you got a Modern Vehicle with the Black Box controller for trailer lights. There is usually a separate fuse or fuses for this controller. The Toyota has two in a separate fuse box tucked down beside the battery. I've seen others with just a single in line fuse tucked away in a similar place.

Try spraying the plug (car and trailer) with CRC or WD40 or somthing equivalent. These things use such small curernts they need a very good connection in the plug to work reliably.

Do you have the polarity of the LEDs reversed???

I have had the same problem with the LED tail lights on the caravan and the solution was to make sure that the earth wire was making good contact,I found this out after a while of head scratching and I cleaned around the earth wire to make sure it was wire to the metal of the caravan,the problem was solved.

Can someone please tell me whether we are talking about the trailer or tow vehicle.... and has anyone got a clue what sort of tow vehicle we are meant to be diagnosing....

People have to learn to put a little effort and a bit more detail in their questions if they want help from others.

Now to answer you question YES some have a seperate fuses and relays and NO some don't have separate fuses and relays..... a few have control modules and some vehicles accept LED lights and some don't (Range Rover, landrover, Volvo, Ford Ranger, Audi and BMW to name a few).

Has your tow vehicle got trailer stability control?