2003 Ford Windstar Trailer Wiring | etrailer Fastest shipping available and a lowest price 2003 Ford Windstar trailer wiring guarantee. Expert lifetime technical support on all purchases. Complete 2003 Ford Windstar Trailer Wiring installation instructions and customer reviews. Call 800-298-8924 to place your order or order online at etrailer.com. SOLVED: Wiring trailer lights for 2003 Windstar - Fixya Wiring trailer lights for 2003 Windstar. I have the same problem as whiteknuckle regarding splicing the wires. There's no provision to install a T-connector for ease. Please provide me a solution, as going to the dealer is my last resort. Thanks. Posted by cafeholic101 on Jul 02, 2009.