Universal electrical adapter that bridges a 7-way RV blade vehicle socket with a 4-way or 5-way flat trailer plug, with built-in resistors that let vehicle computers properly recognize LED trailer lights.
There are several different types of connectors used to supply power from a tow vehicle's electrical system to a trailer's wiring system. Some trailers only need the bare essentials — running lights, brake lights, and turn signals — while others require connections for reverse lights, electric brakes, and auxiliary power. With connectors ranging from simple to complex, it's common for the connection between your vehicle and trailer to not be a perfect match.
The Curt 57004 solves this by adapting a 7-way RV blade vehicle socket to fit a 4-way or 5-way flat plug on a trailer with LED lights. It features built-in resistors for vehicle computers that don't otherwise recognize LED trailer lights, enabling full compatibility. The 4-way flat output connects tail lights, brake lights, and turn signals, while the 5-way flat setting adds a connection for reverse lights.
Built-in resistors help vehicle computers recognize LEDs
5-way adds a connection for reverse lights
Plugs in directly, no additional wiring needed
Side hooks make plugging in and out easier
This adapter connects taillights, brake lights, reverse lights, turn signals, trailer brakes, and auxiliary power depending on which output mode is used. It's part of a broader Curt adapter lineup that also includes versions for 6-way round and other connector combinations, in case a different configuration is needed. Part Number: 57004
In The Package: • One (1) LED Electrical Adapter