Stop wrestling with wire taps and electrical tape. The CURT 56226 is a vehicle-specific, custom-fit trailer wiring connector designed to plug directly into your vehicle's factory tail light harness -- no splicing, no cutting, no guesswork. You get a clean, reliable 4-pin flat output that powers your trailer's running lights, brake lights, and turn signals exactly as the factory intended.
Generic universal wiring kits mean spliced wires, heat-shrink joints buried behind trim panels, and the constant worry that a bad splice will leave you with no trailer lights on the highway. CURT's custom-fit wiring approach eliminates all of that. The 56226 uses vehicle-specific connectors that match the OEM plugs on your tail light assemblies, so installation is typically a simple unplug-and-reconnect job that takes under an hour.
The harness includes a 4-pin flat connector -- the most universal trailer-side standard in use today -- so it will mate with virtually every standard trailer on the road, from utility trailers to boat trailers to small campers and cargo haulers.
Plugs directly into factory tail light connectors. No cutting or splicing into your vehicle's wiring. Preserves factory warranty integrity.
Delivers running/tail lights, left turn/brake, right turn/brake, and ground -- the four circuits needed for standard single-axle trailer operation.
Engineered to match OEM connector locations and pin assignments for the target vehicle, eliminating adapter hassles and wiring reversals.
Draws power from both sides of the vehicle's tail light circuit and uses an integrated circuit board to isolate trailer load from vehicle electronics.
Late-model trucks and SUVs use multiplex or CAN-bus controlled lighting systems. Splicing directly into these circuits can trigger fault codes, blow fuses in the body control module, or cause flickering. CURT's T-One style connectors include a built-in converter/isolator that reads the factory signal without loading the circuit, keeping your BCM happy and your trailer lights steady.
The 4-pin flat connector on the trailer end carries these four circuits:
This is the SAE J1239 standard 4-flat pinout, compatible with the vast majority of trailers sold in North America. If your trailer requires more circuits (12V auxiliary, electric brakes), you will need a 5-pin or 7-pin solution instead -- the 56226 is a 4-circuit harness only.
CURT manufactures vehicle-specific T-One connectors for hundreds of makes and models. The 56226 is one part in that lineup, engineered for a particular vehicle application. Always verify your vehicle's year, make, model, and trim before ordering to confirm this is the correct connector for your application. CURT's online vehicle fitment guide cross-references part numbers to specific vehicle configurations.
Typical installation for a CURT T-One style connector:
No drilling, no crimping tools, and no electrical tape required for most applications. Total install time is typically 20 to 45 minutes.
The 56226 provides four circuits only (ground, tail, left turn/brake, right turn/brake). It does not support electric trailer brakes, a 12V battery charge line, or reverse lights. If your trailer or camper requires any of these functions, you need a 5-pin flat or 7-pin round connector system instead.