Truck lighting severed wire

I purchased a 40' articulated truck container for moving purposes lst April but the trucker who is supposed to deliver it keeps using the excuse that a cable for the rear lights has been cut and he doesn't know how to repair it, as he's a professional Truck driver, not an electrician. I've been told since, that he's lying so he can use my container for himself and that joining two color coded wires together is all it takes, something every Professional trucker knows how to do.
I would appreciate any information you can provide as tothe difficulty in joining the wires.
Thank you very much,
Nicole