Although most vehicles do not require an interface when using our V10P and F2 Series LED Headlight Bulbs there are some vehicles that do. We offer interface harnesses to fit most applications.
An LED Headlight interface (or decoder) will solve the following;
Dodge, Jeep, Ram and some European vehicles that use a Canbus Headlamp control system
Vehicles with a bulb out indicator system may need an interface when using V10P series headlights due to their low draw (only 1.3 amps per bulb)