Tekonsha Trailer Light Power Boost ModuleModuLite® all the additional power required to supply the trailer lights is supplied directly from the battery. Only a small amount of power is required from the fuse panel, turn signal switch, taillight harness and lamp out sensor if so equipped, to signal when to illuminate the trailer lights.Features:Works With 2 Or 3 Wire Light SystemsWorks With Either LED Or Incandescent Bulbs16 Ampere For The Taillight Circuit And 4.2 Ampere For The Turn Or Stop CircuitsDraws Power Directly From The Tow Vehicle Battery; Uses Less Than 5 Milliamps Of The Vehicle CircuitHas Integrated Re-Settable Short Circuit And Overload Protection To Safeguard Itself And The Tow Vehicle From Shorts And Installation Wiring MishapsDesigned Not To Send Feedback Thru The Vehicle Circuits. Interprets Or Decodes Multiplex Signal InputsUpgraded Circuitry Works With Vehicles That Use A Pulse Width Modulation (PWM); This Gives The Trailer Lights Full BrightnessCompatibility: 2 Wire And 3 Wire SystemsBulb Type: Incandescent And LED BulbsTurn/Stop Light Ampere Rating (A): 4.2 AmpereTail Light Ampere Rating (A): 16 Ampere