Hopkins 7 Pin Trailer Plug Wiring Diagram. This supplies power to the road lighting of your trailer or caravan. Your trailer wiring plug doesn't match the one on your vehicle.
Your trailer wiring plug doesn't match the one on your vehicle. Various styles of connectors are available with four to seven pins to allow transfer of power for the lighting as well. Due to this there are unified vehicle outlets on the market that combine these two into a single module. ^ "Hopkins™ trailer wiring diagram" (PDF).
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Trailer wiring is very important to towing safety.
My professionally made trailer by Double A trailers used different locations for wires - so get your wiring diagram from the. Your trailer wiring plug doesn't match the one on your vehicle. Learn all about trailer wiring at HowStuffWorks.