Description
CURT 59004 is a universal towing-wiring kit with a heavy-duty taillight converter and both 7-way RV blade and 4-way flat trailer connections. It supplies stop, turn, tail and reverse lighting, electric trailer brakes and a 12V auxiliary circuit. All lighting circuits, including reverse, have short-circuit and overload protection.
Brake controller and installation
The harness works with standard U.S. trailer 7-way and 4-flat connectors and CURT brake controllers. A dedicated brake-controller lead can connect to the cold side of the vehicle stop-light circuit. Although the manufacturer describes brake-controller compatibility as plug-and-play, CURT installation instructions require identifying and tapping the vehicle lighting wires, routing fused power to the battery and assembling the 7-way connector. The 7-way socket mounting bracket is not included. This is universal splice-in wiring, not a vehicle-specific T-connector; installation difficulty and time depend on the vehicle and installer.
Specifications
| End Type | 7 Flat/ 4 Way Flat |
| Universality | Fully Universal |
| Color | Green/ Yellow/ Blue/ Black/ Red |
| Marine | No |
| Material | Thermoplastic Rubber |
| Vehicle End or Trailer End | Trailer/ Vehicle End |
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