Definition Service information may include but is not limited to – technical information of a vehicle, machine, or product detailing operation; installation and servicing procedures; manufacturer instructions and specifications; technical terms and descriptions; and detailed illustrations. This can be accessed in hard copy or electronic format and is normally sourced from the manufacturer

By law, trailer lights must be connected into the tow vehicle's wiring system to provide trailer running lights, turn signals, and brake lights. This is accomplished by tapping into the tow vehicle's electrical harness to transfer power to the trailer wiring system. Connectors are used between the two to allow disengagement when not towing. Various styles of connectors are available with four to seven pins to allow transfer of power for the lighting as well as auxillary functions such as electric trailer brake controls, backup lights, etc. Choose a connector that has the number of pins for the functions required. The male end is mounted on the tow vehicle side and the female terminal on the trailer side..