adanvjr

Good morning,
I've been trying to locate an adapter that can mate between my F150's 4-Pole FLAT connector to trailers with a 7-Way BLADE connectors.

I've been unsuccessful.


I've checked on www.etrailer.com but it's not much help as it's giving me 2 options:
- 1 with 7-way factory wiring (which I don't have)
- 1 without 7-way factory wiring (which I do have, but there's no 7-way blade connector option for it)

I called them, but it's only to put in an order and check status.

I still need the 4-Pole Flat connector for some trailers and to haul my kayak around, but I'll also need the 7-way to haul other trailers around.


It looks like I may just get any 7-way connector (with 4-Pole Flat connector) and wiring diagram and I have to do a full splice into the existing wiring?


Can someone here help?

Thank yall

BadFish523

I think (not 100% sure) you can by the harness for a 7 pin and just plug it in to the connector under the truck. I don't know if they come with both the 4 pin and 7 pin but I do know the harness connects somewhere above or near the spare.

BadFish523

http://www.tascaparts.com/ford/f-150...wiring-harness


I don't know what year or model your truck is and again I THINK you can just buy this and plug it in where the original wire harness plugs in. You would still have to add a brake controller to have that feature.

adanvjr

It's a 2005 F150 - XLT - V8 5.4L

It be nice to have something like this:
https://www.etrailer.com/Custom-Fit-...id=20051172005


However, my truck doesn't have a connection like that.
The 4-Pin FLAT wire harness is connected on the truck by this large rectangular grey connector.

08buckfifty

Amazon has some 7 pin to 4 pin adapters and 4 pin to7 pin. And have pin to blade and vice versa.

daanbc05

my 04 XLT has the plug-in and 7 pin connecter underneath. The 7 pin was wrapped up in the wire of the plug-in.

Mod (Ret.)

Bite the bullet and wire it correctly. At least one wire of the 7 pin has to run up to the controller, in order for it to control the current needed to apply voltage to the electric brakes of a trailer that is equipped with them. No 4 to 7 pin adapter can do this part. And for sure you would not tow a trailer equipped with electric brakes without a controller. right?

The extra 7th blade is a 12V accessory source used for trailers (such as a large camper) that has a 12V refridgerator that can cool while in tow. If you don't need that, you don't have to wire that circuit.

Wiring kits can be bought for way under a hundred bucks, and the controllers sold today are also available for under $150.00.

adanvjr

You mean the connector head behind the bumper was wrapped entirely?

I'll be checking again when I get a chance. Having T-storms rolls this afternoon.

adanvjr

Makes total sense.
I'll be checking again and see if it was the same as daanbc05 said.



One of the trailers is a heavily loaded 30' trailer that is filled with chairs (probably 6000-7000 lbs worth)**. I only do about 30 mph max with it, but it's only a 5 mile trip.

**Long story short, it belongs to the church and the pastor asked me if I can pull it to the service for setup and take it back when service is over and it's loaded up again. Since I have no lights, a fellow church member follows behind in his car.

BadFish523

I would chase the wiring harness for a ways back from the 4 pin connector. They may not have included it on some models but I don't see why. I would think there is a 7 pin or a plug to add a 7 pin somewhere under there.