Re: Trailer Lights - Need Help
"Clark" <firstname.lastname@example.org> wrote in message
> Assuming you have the right connector, is there anything you need to do to
> activate the trailer wiring. I know on my 2000, I had to add two relays
> to the breaker box, and maybe something else. You might check the book
> about that.
> "LHS" <email@example.com> wrote in message
>> I've got a 1999 F-150 bought new with the factory installed four
>> trailer wiring harness below the rear bumper. Hooking up my son's boat
>> trailer to it I've got no lights at all (tail, stop, turn, etc.).
>> the trailer to his truck, Yukon, all works fine so the problem's not the
>> trailer wiring. All the F-150 lights work fine with or without the
>> harness plugged in. The connector on the trailer is the round type with
>> standard brown, yellow, green and white wires. I bought a four connector
>> flat pigtail and spliced into the wires on the trailer. Being
>> challenged where would be a good beginning to troubleshoot? I can meter
>> if need be if I can find the meter.
>> Thanks in advance for the assistance.
Like Clark said try putting the breakers/relays in. It should have come in a
package with a electric brake trailer pigtail. Also something to check would
be for a good GROUND off the 7 pin connector. Mine also came with a 7 pin to
4 pin adapter that plugs into the 7 pin that can be used
I can run our jetski trailer, 18 ft boat trailer, and 5 x 10 utility trailer
with no problems in the 7 pin with adapter or a 4 pin. It also works fine
with a 7-6 pin adapter used for the 5x10. Hook our 18ft car trailer and I
get no brakes or lights on. Once in a great while it will have very dim
lights. We ran a 12" ground wire directly off the ground wire on the truck
and added a female bullet connector on it. On the trailer we just added a
ground wire onto the trailer jack bolt and ran it along with the harness and
put a male bullet connector on it . With this added ground it works just
fine with all functions operating.We plug it in when using just that car
trailer and I have lights, brakes, turns etc.
It sounds weird but its the same way on my Dads 2002 model with the same
symptoms on that trailer only. Mine is a 2000 model. Its worth a try and
only takes a short piece of wire to try..........