Signals at trailer connector stopped working?

From racefan966 the suggestion was purchase and install a new trailer light harness. Thanks, but I'd rather repair the one already installed. Its routing is behind the left side trim panel and cargo box behind the third seat and out a hole in the bottom of the body to the hitch frame.
Can somebody locate for me the "trailer lighting control unit" shown on pg. 2 of the exterior lamps circuit (Mitchell 1 on-line Manual) of my '04 Pilot? That and the in-line fuses locations are not described on the diagram page.

Thanks,
Dave

PS. E-mail is; dntellis2@yahoo. Com. I was not notified of this response there.

I solved the problem and will share.
In my case, it wasn't the wiring harness, it was the right brake light/turn signal circuit in the light assembly itself (it looked fine--no corrosion, etc.). It blew one of the in-line fuses (7.5 amp) in the trailer wiring circuit. These can be easily located underneath the rear trim panel that is between the cargo box and the back of the car. They will release if you pull up on the panel carefully, as will the four "hooks" that attach to the back of the cargo box. (Remove the cargo lid first, just open then lift up.)The in-line fuses(2) are in that white connector- like box next to the trailer lighting control unit. Slip off the control unit cover that attaches to the back of the cargo box and remove the bracket that holds the unit in place (hex-head machine screw)for easier access to the wires.
When replacing the rear trim panel, be sure the fuse assembly is properly located in the channel provided on the underneath side or it won't fit on. Also, be sure to return the back edge of the panel to the channel in the rear door seal.

Hope this helps anybody. Cost me a trip to the dealer.

Maybe next time I can get more help from this web site.

Dave

DNTELLIS2 can you upload a picture of the fuse location?