Trailer Wiring - 4 wire flat to 5 wire flat

[David Batchelder]

I own a 2001 2WD Sport Trac that has the std 4 wire flat connector just under the bumper. I recently bought a boat and its trailer comes std with disc brakes. As a result, the trailer comes std with a 5 wire flat connector. The boat and trailer only weigh around 3000 lbs, so I probably don't even need to worry about the trailer brakes, but since they are there, I would like to use them.



My question is, "How do I get the 5th wire into the loop on my truck connector?" - Whre do I get the necessary parts-any detailed instructions would be helpful.



I think the 5th wire is for reverse to deactivate the trailer brakes.



Thanks in advance.

 

[Gary DiPietroSr]

Tarheel, go to an auto parts store like advance, etc and look for an adaptor from one plug to another. I have an adaptor plug that goes from the flat plug to a round bargman type for my 5000lb payload. It might just have the jumper built in to take care of the brakes. Gary D. in CT

 

[roger Biddlecombe]

I think you will have to get electric brake controller,then wire it in,including running a separate blue wire to the trailer plug ,go to Tekonsha on line they are very helpful & will answer any questions, I have just hooked up a trailer with electric brakes to my 01 trac

 

[Mark K 2]

I had to do the opposite. I have rear amber turn signals on my ST. I had to get a five-wire to four-wire converter.



Whenever I wire up trailer wiring for friends, I like to use the converters that have an independent 12 volt feed. It reduces the demand on the factory wiring.

 

[Tom Schindler]

Get yourself a 7 RV style plug. You will then be covered for anything. Then get a 7 to 5 adapter.



A boat trailer with electric brakes? I think they are surge brakes.



You are correct about the 5th wire. It is connected to your back-up lights and deactivates the surge brakes so you can back up.







Tom