How do I Wire Trailer Lights on a 2002 Chevrolet Astro Van?
A single plug on your 2002 Astro Van will provide turn, brake and running lights, as well as a battery charging circuit and power to electric brakes if required for towing a trailer. The vehicle to be towed will determine the type of harness you need to install: a basic rental trailer uses a four-wire configuration, a camping trailer with a battery charge circuit will require five wires and a travel trailer with brake control uses a seven-wire plug. Four-wire plugs come in two flavors — flat plastic or shiny round metal. There is no difference in their function, only their look.
