The WD45 Diesel Tractor is a very collectable Tractor, and we built a real nice wiring system just for that collector piece. Our kit as with all our kits have increased size circuitry to handle loads better. Color coded the same as OEM. A new pre-heater cable is also part of the kit. Hardware packets, and wiring instructions are included with the kit. If any switches are needed, we offer those as well. Overall, a nice kit for the WD45 Diesel!