My guess is that you are missing a segment of the harness.

What year is your truck and has the rear bumper area been modified?

You need to consult the parts manual and/or visit a dealer's parts dept to get the info you need and order the correct parts. It should be a pretty straightforward thing to do.

 

It’s an 2007. The rear hitch and wiring were completely removed from previous owner.
Does it have to be an Honda part or is there an aftermarket brand?

 

Unless someone else speaks up.....I am 95 percent sure that what you need is the Honda harness.

You could try a junkyard and/or buy it from a dealer.

Once you have the part number you can use the Web to get the best price.

It should not really be a big deal, but I know finding pieces missing is disappointing.

 

Thanks for your help. I was able to find the exact part. And it is an Honda only part. Even with a web search on the part number it’s roughly the same price everywhere.

 

What I found is it looks to be a wiring harness connection to the distributor for Acura Integra 1999 to 2001. Someone got creative with a old wiring harness. The pictures is of the male connector, you have the female connector.

 

Or....as is common in the industry.....the same connector is used across many platforms.............for many years.

This connector has lots of circuits.... of which 2 of them are more robust than the rest.

Great research!

 

Edit: accidentally deleted this link:

https://www.ridgelineownersclub.com/threads/trailer-wire-harness.240768/

Sumitomo HX series 10-way

https://www.ridgelineownersclub.com/posts/3360952/

 

This is the part that plug connects to for Gen2 Ridgelines:

32113-SJC-A00 - Genuine Honda Sub-Wire, Trailer

HondaPartsNow.com offers the great deal for genuine Honda parts, 32113SJCA00. Sub-Wire, Trailer for $277.56. All parts are backed by the Honda's warranty.

www.hondapartsnow.com

For your 2007 Gen 1 :

Trailer Hitch Harness - 2007 Honda Ridgeline 4 Door RT KA 5AT

Shop in the parts listing - 2007 Honda Ridgeline 4 Door RT KA 5AT Trailer Hitch Harness. Discounted prices and Hassle-Free Return on genuine Honda parts.

www.hondapartsnow.com

Also see:

https://www.ridgelineownersclub.com/threads/2nd-gen-trailer-wiring-connector-disassembly-question.229872/

 

I think the gen2 one will work on mine. I have an aftermarket hitch bracket anyways so how the plug attaches to that would be different.

 

Don't need a genuine Honda plug there for that connector which is the pre wire for a 7 pin brake controller. I bought both the Tekonsha brake controller and the wiring adapter from etrailer, neither were 'Honda parts'. At the rear, your 7 pin connector, there are numerous (Also generic) 7 pin to 4 pin plug adapters for towing trailers w/o trailer brakes. I keep a couple of them in the truck trunk -just in case ! Also a 1 7/8", 2" and 2 5/16" trailer ball(s). My '20 RTL-E came pre-wired with the connector you show, tucked waaay up there under the dash.....