Hitch bike rack flat plug?

[ripple963]

2026 LEII hull 1673. Just purchased a new bike rack Kuat Piston Pro X for the back of the Oliver that has turn signal and brake lights installed in the rack. It requires a flat plug connection. Any suggestions on how to get that flat plug powered from the trailer? I searched the database for “flat+plug” and didn’t see anything…

[jd1923]

4 hours ago, ripple963 said:

It requires a flat plug connection.

It would help if you showed a picture of the "flat plug" on your new bike rack. Without seeing that, I might guess it could be the 4-pin trailer connection (for small trailers without brakes). Here is an example:

Curt Vehicle Wiring Harness with 5-Pole Flat Trailer Connector - 60" Wire Lead CURT Custom Fit Vehicle Wiring C58531

What you're attempting is not an easy job! Most trucks that have the 7-blade connector also have a 4-pin connection zip-tied somewhere above the bumper. But the Oliver doesn't have one! 🤣

You can pick connections for brake lights, turn signals, reverse and running lights in one of two locations. 1) tap into the lights at the rear of the Oliver, or 2) at the junction box where OTT splices the 7-blade harness into the Oliver trailer wiring.

I believe this junction box in newer Olivers is inside the bathroom vanity, but who knows on a 2026. In our hull it's easily accessed under the front dinette seat (see picture). If I was doing this for our hull, I would pick option #2 since you can see these wires are easily accessible (likely not so in your Oliver).

The link I supplied shows a 60" wire which is fine for rear wiring. If you are going up to the front harness, you want something like this that has longer wires. It's actually rather easy to run wiring from the rear, along the streetside basement, all the way up to front junction box.

35 Ft 4-Way Trailer Wiring Harness - Wishbone Style - 42" Ground Optronics Trailer Wiring A35W42B

The hard part front or rear is to tap into the existing wiring. I rarely recommend using 3M Scotchlok™ connectors, but I would in this case since secondary rear wiring on a bike rack is not exactly "mission critical."

Hope this helps! 😎

Edited yesterday at 05:55 PM by jd1923
Added pic

[Gliddenwoods]

I have "flat plug" four pin connections on my Oliver bike rack. I ran a connection wire under the Oliver to my F-150 and plug it directly into the truck. 

To accomadate both the trailer electrical cord and the bike rack cord I remove the truck outlet cover and replace when not towing. To remove and replace the outlet cover I replaced the plug hing with a pin that can be pulled and replaced. (If you are interested I can post photos tomorrow.

This system has work flawlessly for two years 

[Gliddenwoods]

[jd1923]

14 hours ago, Gliddenwoods said:

I have "flat plug" four pin connections on my Oliver bike rack. I ran a connection wire under the Oliver to my F-150 and plug it directly into the truck.

This is an excellent idea! If the truck has both 4-pin and 7-blade connections, as shown in your picture, all you need is a 30 ft 4-wire harness, male plug on one end, female on the other, zip-tie it under along the length of the trailer. 

The only downside is having to connect one more thing each time you hitch the trailer but a much easier installation vs connecting to the Oliver wiring as I had previously suggested. But another plus is your wiring can be deleted easily, if in the future you stop using a bike rack.