I doubt such a diagram exists as it will vary trailer by trailer going down the line based on how the tech building it feels at that moment.
Supposedly they are all color coded so the same color wire at both ends of the trailer should be the same wire.
__________________
2019 GMC Sierra 3500HD Denali Diesel DRW (Crew Cab | 8 Ft bed | OEM Puck System | Curt Gooseneck Ball for OEM Puck)
(OLD) 2018 GMC Sierra 2500HD Denali Diesel (Crew Cab | 6.6 Ft bed)
2019 Grand Design Solitude S-Class 3740BH-R Fifth Wheel (Onan 5500W LP Generator | MORryde SRE4000 Suspension | 3x Cross Members | Sailun S637 ST | Reese GooseBox 20k 2nd Gen)
(OLD) 2018 Keystone Hideout 28RKS Travel Trailer
|