When the reel failed (suddenly dead) in my old trailer I could not find replacement parts. (needed brushes and armature)
I intended to temporarily removed the cord from the reel. I connected it directly into the junction box where the reel cord attached. But, I never found replacement parts. The cord was still attached that way when I sold it, years later.
If you add a temporary cord, make sure the reel cord is disconnected. If not (and both cords are connected) the exposed male end of the reel cord will be energized.
2014 Silverado LTZ 1500 Crew Cab 5.3L maximum trailering package