Trailer Lights Wiring Harness
The Frugal Choice: Reese 118262 with Curt 58291
After you enter your vehicle information, there should be an additional wiring connector to purchase as well.
The Savvy Sweet Setup: Hopkins 48470 with Hopkins 48615
A little better quality, plus it adds a 4-way connector in case you ever need it. After you enter your vehicle information, there should be an additional wiring connector to purchase as well.
Two Custom Harnesses:
in case the previous two options won't work for your vehicle - Tekonsha 118276 and Curt 55243
These two options are for if you need to tap into your tail lights assembly. They're more expensive, but might be easier and cheaper in the end than patching in all 7 wires -
Curt 55242 and Curt 56366
This is the option for patching in each of the 7 wires individually. This would be a lot of tedious work - Anto 7 Wire to 7 Way
5th wheels need an extension into the back of their truck. This is an external, removable extension - Conntek
These are internal 5th wheel extensions that have to be installed onto the truck:
7 feet - Curt 56070 and 10 feet - Hopkins 41157