Susquehanna MotorSports (SMS) builds complete custom designed wiring harnesses for headlamp conversions, the addition of auxiliary fog or driving lamps or both; with standard ground or switched ground (for Japanese cars and trucks, and some newer Chrysler and Jeep products) to meet you specific needs.   If you don't see what you need below, please call or eMail to see what we can do for you. We build these harnesses in-house to your order.

These Wiring Harnesses are a simple solution to upgrading your headlamp and auxiliary lamp wiring.   12 Gauge wire is used for all High Current circuits.   Multi-Conductor wire is used for parallel runs.

Connectors simple plug into your Original Equipment connector and your upgraded bulbs.   The only other connections are at the car battery.   Includes separate relays for high and low beams mounted on a relay base designed for mounting inside the engine compartment.    2 headlamp systems have 2 relays, while 4 headlamp systems use 3 relays.

NO CUTTING OF YOUR EXISTING WIRING HARNESS IS REQUIRED!   If you want to remove your custom harness, no evidence will be left behind.    This is truly Plug and Play.

Please include Make, Model, Model Year and any significant information (such as optional equipment, e.g. HID Headlamps) of your vehicle in any eMail request.