Maxi-Seal Harness Systems, a subsidiary of Peterson Manufacturing, designed its Defender modular harness/lighting system to protect trailer wiring from corrosion. The Defender system features ...

A:The trailer wiring is a little different on light- and heavy-duty trucks, but the basics apply to both.No power at all to the trailer connector would mean a major break at the connector or the ...

“RP-704B, the Recommended Practice for Heavy-Duty Lighting Systems for Trailers, was last updated in January 1992 and was badly in need of an update,” explains the leader of the project, Brad ...