My 2007 Odyssey has a receiver hitch which is useful for a bicycle carrier.
I may want to pull a light trailer to haul some stuff that won't fit inside the van. Is there any trailer lights harness or connection built in? I see no loose wires or connector hanging out. It makes sense to me that the manufacturers would pre-wire larger vehicles for a trailer harness. I'd rather not have to cut and splice to make the hookup.

 

take a look at your right rear aft panel to see if you have a existing harness there. if not you may have to get a trailer hitch wire add on harness.

 

There are "T" harness that plug and play.
Disconnect the original connector and plug in trailer light harness
No cutting and no splicing.
But, it will cost you.

 

Okay, I found the panel in the right rear. There is a vacant socket that looks to match up to the manual. Is this an industry standard socket or unique to Honda?

I found a harness/adaptor on ebay that seems to be correct. The generic photos show different pin arrangements. There is a black box between the 7 connector socket in the panel and the 4 plug trailer hitch connector. The trailer in question has a 4 wire connector.

Is there an recommended routing for the wires? I see a plastic plug in the steel pan below the panel block but that would probably let water in to the body. Or just run the wires out the rear hatch when needed. The rubber door gasket shouldn't damage the wires.

 

I bought a plug & play kit. But it turns out the B+ terminal in the honda socket has no power when the ignition is turned on or the engine is running. Any suggestions on what fuse this would be? There are a number with cryptic labels or "not used". The other terminals do work: left & right turn signals and the brake lights and the "small lights"(parking/running lights). the kit B+ has a in-line 10-amp fuse then feeds in to the black box of the kit. Because the black box is not getting main power, there is no output to the trailer.

The kit came with a second 10amp fuse, a rather small one. It matches the physical size of the fuses in the drivers side fuse box.

photos:

manual page 341 Pinouts on the Honda trailer socket.



Kit black box and connector to honda

Trailerhitch.kit

Trailerhitch.kit socket

Interior Fuse Box drivers side:

Manual.page.416

Interior.Fuse.box.drivers.side

Interior.Fuse.box.drivers.side (1)

Interior Fuse Box passengers side:

Manual.page.417

fuse.panel.passenger.cover

fuse.panel.passenger


Primary Under-hood Fuse Box:

manual.page.415

Primary.Under.Hood.Fuse.Box (5)

Primary.Under.Hood.Fuse.Box (rotated)

Primary.Under.Hood.Fuse.Box (1)

fuse.panel.primary


Secondary Under-Hood Fuse Box

manual.page.415

Secondary.Under.Hood.Fuse.box (2)

Secondary.Under.Hood.Fuse.box (1)

fuse.panel.secondary

 

Okay, after some www searching I found the Honda instructions on adding a trailer hitch and wiring. Put the other 10a fuse in slot 5 of the passenger fuse box (labeled not used). It works!