I have a 2016 JK. I recently got a boat that has surge breaks and I want to wire in a new 5-way harness. I have pulled the 4-way to where it meets the drivers side tail light housing. The five way has a blue, white, brown, yellow, and green wire.
How do I go about splicing then in with the others to make this work?
I'm not sure what wires do the braking, signaling and reverse.
Your help is greatly appreciated.
I know there's google but I'm having a hard time understanding some of the wiring diagrams and hope one of you have done this and can assist me.
Remove the driver's side taillight and disconnect the light from the harness. Use a multi-meter to test each wire. I can't remember the color of the reverse wire but I remember it was one of the corners of the connector.
If you have surge brakes, you don't need to rewire. Surge brakes don't use anything from the Jeep. You still only need turns, brake lights, and ground.
If the trailer has true electric brakes, then you need to upgrade.
Surge brakes use the force of the trailer pushing into the tow vehicle to activate the brakes.
I just got a 2017 Jeep Wrangler. I have a 5X8 enclosed trailer I will pull once in a great while. The trailer has electric brakes. Is there a spare wire in the harness for running a brake controller? Or do you need to run one?
First - there is no identified color for backup lights, and trailers don't usually have backup lights. The backup light is there to illuminate the area behind the vehicle for the driver. The trailer blocks that.
The standard colors are:
Ground -- white
Running/tail lights -- brown
Left turn/brake -- yellow
Right turn/brake -- green
Going to a 5 way adds:
Electric brake -- blue
Going to a 7 way adds:
+12 Hot -- black
Auxiliary -- red
Light/medium utility trailers are usually found with the four wire connection. Heavier utility/travel trailers have the 7 round system with flat blades. Over the road truck/trailer combos use a similar 7 round system but with round pins.
If you are going to hook the blue wire to the reverse light circuit, you need to remember that is non-standard. Red would be the preferred color for an auxiliary connection.
The fifth wire (blue) on a surge brake equipped trailer only activates a solenoid valve behind the master cylinder. The valve closes the hydraulic line to the calipers. This allows the trailer to be pushed back without applying the brakes.
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