Stupid trailer connector...

[Dietoremain]

so my dumb connector wont work correctly on my 2 horse trailer. I have turn signals and brake lights but when I turn on the headlights, NOTHING. i am using the 7pin adapter for the little one that is on the trailer of course.. any ideas? Im bout ready to wire the wire for the headlights into my bumper lights!!

[Austin G]

The trailer is a 4 pin?

I am guessing you don't have a Ford hitch/wiring? Mine has a 4pin along with a 7 pin.

[Dietoremain]

I do have the ford hitch.. it has the RV plug and the little 4pin. but the trailer has the round small plug its like a little 6 pin one... i could get a pic. but ya....

[Austin G]

Oh, I understand now.

Do you know that the trailer wiring works?

[Dietoremain]

I also plugged my truck into the flat bed trailer same exact thing. Im now thinking its a way my truck is wired or a fuse????
We have another F250 here that works the trailer just fine.

[nccatfan]

Loose/bad grounds tend to cause some oddball malfunctions like that. What have you checked so far.

[Dietoremain]

Not muchh really.. any tips where to start?

[SuperCrutyPS]

Do you have an owner's manual? There are trailer fuses under the hood.

Do you have a way to check voltages? If so, can you check the voltages at the 7-pin plug?

[coaltrain444]

What's the ball on your truck look like. Is it real rusty.

[2003f350]

I have two different cofiguration 7-6 pin adapters. From what I understand they wired 6 pin trailers a couple different ways. I thought it only affected the trailer brakes and a constant 12v lead though.