Plug-in that allows trailer wiring and relay kits to power trailers with a four-wire harness (run/left turn/brake, right turn/brake and ground). A fifth bonus wire is available to provide a fused 12V power supply to the trailer compartment for lights or keyless entry systems. Includes 4-pin flat vehicle connector. Sold each.

• Plug-in that allows trailer wiring and relay kits to power trailers with a four-wire harness (run/left turn/brake, right turn/brake and ground)
• Fifth bonus wire is available
• Includes 4-pin flat vehicle connector