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Help with wiring in a trailer plug in...

17706 Views 13 Replies 10 Participants Last post by  MikE2
I'm wanting to install a basic flat 4-pole connector trailer connector. My 94 does not have one installed. Anyone have a wiring diagram for this?

Thanks!
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For about 15 buxs you can buy one that plugs into your harness. Alot easier and cleaner than splicing into the harness.
Yep, I forgot to add this little tidbit.....For the life of me, I can not find a freaking pre wired plug in on the harness???? kind of strange, did some of them not come with it? Its a 94 XLT 5.8L..

I've installed my new reciever hitch and expected to be able to plug right into the pre wired plug...but now I cant find a plug..:duh

It should be obvious but.....

So I'm thinking I'll need to splice it in.
Yep, I forgot to add this little tidbit.....For the life of me, I can not find a freaking pre wired plug in on the harness???? kind of strange, did some of them not come with it? Its a 94 XLT 5.8L..

I've installed my new reciever hitch and expected to be able to plug right into the pre wired plug...but now I cant find a plug..:duh

It should be obvious but.....

So I'm thinking I'll need to splice it in.
See post#2. No splicing required: http://www.etrailer.com/pc-VWH~118350.htm You can usually find something similar at Wal-Mart
A quick warning here - if using that breakout harness to get a 4-way plug, do not hook up a trailer with lots of running lights on it, as it can overload your headlights switch and burn it up.
Here ya go;
Connector, 7 Blade Installation in a 96
Source: by Aaron91RS at FSB
he wrote; "...In the back under the bumper are two round plugs going to nothing.
One of these round plugs can be used for the simple 4 pin trailer connector and you can buy a plug and play harness for this.
However this won't give you brakes for a big trailer that requires the 7-blade plug.
The only factory 7 blade plug is the one ford made and its $116..." Read & see his pics..he did a nice write-up


Trailer & Camper Wiring Diagrams for 92-96 Bronco & Trucks
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
Check the junkyard. I see 7 pin plugs still bolted on a lot of cash for clunker f-150s and broncos. On the drivers side behind the gas tank, you will find a gray and black plug, should be capped off. That's where the 4 pin or 7 pin plug will plug in.
Thanks guys!!!!! I wasnt getting what you were saying but the link cleared it up. Got the connector kit on order!

The one plug in kit that I have had to use in the past just plugged right into a dedicated, capped off connector. (on a 2001 Explorer)

Shouldnt need more than a basic 4 pole connector, I'm just gonna haul my boat and a small trailer...not alot of running lights on either of them.

Thaks again!!!
Thanks for the link Miesk!! I have been looking for a plug and play harness.\ for my 90 bronco.
By the way guys, that "plug and play" breakout harness is a great start for a relayed setup to handle big trailers with lots of lights - the only thing you need is three relays (left blinker, right blinker, brake lights) and a decent-size power wire for them from the battery - you use the breakout harness to only trigger the relays, then you split the power feed between all of them and wire up each relay's output to the appropriate pin on the trailer connector. It's a very easy way of wiring a 7-pin RV connector on Ford trucks that do not have the factory tow package, and I realize that it's not really need on a Bronco but maybe if you also have an F-Series truck you can use that method...
Thanks for the link Miesk!! I have been looking for a plug and play harness.\ for my 90 bronco.
YW Y!:thumbup
Thanks to Aaron !!!!.. he did da job!:thumbup:thumbup:thumbup
I went to the website suggested by rla2005 (http://www.etrailer.com/pc-VWH~118350.htm)
I have an 89 FSB and it show that there is no plug and play...but under my rear bumper I have what looks like the same pre-wired plugs shown above...anybody else had the same experience. Should I just splice in or try the pre-wired for a newer model bonco???
I went to the website suggested by rla2005 (http://www.etrailer.com/pc-VWH~118350.htm)
I have an 89 FSB and it show that there is no plug and play...but under my rear bumper I have what looks like the same pre-wired plugs shown above...anybody else had the same experience. Should I just splice in or try the pre-wired for a newer model bonco???
Light Truck & Bronco Trailer Towing Package Wiring Kit (PN F0TB-15A416-AA)
The eight wires of the trailer-feed wiring harness, 13A576 (part of trailer towing kit), are ready to be installed to your weatherproof trailer wiring connector. Refer to the identification tag on each wire for the correct electrical function of each circuit.

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By the way guys, that "plug and play" breakout harness is a great start for a relayed setup to handle big trailers with lots of lights - the only thing you need is three relays (left blinker, right blinker, brake lights) and a decent-size power wire for them from the battery - you use the breakout harness to only trigger the relays, then you split the power feed between all of them and wire up each relay's output to the appropriate pin on the trailer connector. It's a very easy way of wiring a 7-pin RV connector on Ford trucks that do not have the factory tow package, and I realize that it's not really need on a Bronco but maybe if you also have an F-Series truck you can use that method...
Relays are nice if you've got a ton of running lights or anything else with high amp draw, but its not needed for the brake/turn lights. You could if you want to but its not even close to being needed.
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