I already posted this in the towing section so sorry for the double post if thats against forum rules.....


Ok so i just bought a new trailer for my atv, its 5x10 with 4ft gate, anyway when i bought the trailer the light plug was about 5 inches short of reaching the plug due to my truck being lifted and the drop hitch. The guy gave me two 12in pieces of trailer wire, color coded for each side to make adding the extensions a no brainer. So i do the wiring then all goes wrong. When i hit the brakes, nothing. When i hit the hazards, nothing. When i hit either turn signal both sides of the trailer lights start flashing like the hazards are on. So i to try to figure out whether its my truck or my wiring i hooked up to my buddies boat trailer and get the same situation. I am pretty sure it has to be something in my truck. I am gonna try hooking it to my buddies truck when he gets home to verify 100% its my truck and not the trailer wiring. I have checked all my fuses and found 1 that was burnt out (right side tow turn) so i replaced it but still no luck. Could it be a relay? Any help is greatly appreciated. I am about to move 800 miles in a week and need it fixed. Thanks guys.

 

How many conductors are there on the trailer? do your signals still work properly on the truck?

 

everything on the truck works fine. Its the 4 pin plug. The truck has the towing package so its all prewired from the factory. thanks

 

Start by testing your 4 pin with a meter, to find out if the functions are correct there.

Diagram for the correct pin functions :
https://www.f150online.com/galleries...028-149221.jpg

Once you know your truck is operating correctly ( i.e. did not blow a fuse while trying this ), next to to check the pins on the trailer, to see what is going on. Sounds like something got screwed up on your truck, where there should have been no changes ( all the extension should have been to the trailer )

Let us know what happens with the testing on your 4 pin on the truck.

 

today my buddy hooked his truck to it and the brake lights worked, but when he hit his turn signals it did the same thing my truck did, the trailer lights flash like the hazards are on. There is a white wire on the trailer plug that goes to nothing. maybe by grounding it the turns will work normal? the brake light problem has to be on my truck though.

also sccully, that link looks like it'd be helpful but i cant read it, its too small

 

Read the other thread you started.
The white wire is the ground and needs to be hooked up to the frame so the turn signals don't ground through the other lights.