The HID Warning Canceller, also known as HID Error Message Canceler, HID Decoder and HID Anti Flicker Capacitor is required for vehicles that get a headlights "flickering" or "strobe effect" after installing an HID Conversion Kit. They also eliminate "Bulb Out" warnings or "Bulb Failure Warning" in your dash.
When installing an aftermarket HID kit, you will encounter problems on some vehicles with computer-managed electronics due to the difference in power used between standard halogen bulbs and xenon bulbs. To save time and get your kit installed correctly the first time, you want to make sure you have any necessary accessories when you first order your kit, so you can avoid flickering, error messages and incorrectly operating lights.
To find out if your vehicle needs a canceller cable, follow these guidelines.
Does your vehicle notify you when a bulb is out?
Your vehicle has a CAN (Controlled Area Network) and will require a Warning Canceller Harness and a relay harness
Some vehicles, including Mercedes, Audi, BMW and Chrysler will also generate a CANBUS error message and require a CANBUS Warning Canceller Cable instead (a CANBUS canceller does not require a relay harness).
Do you have an Acura, Audi, BMW, Chevrolet, Chrysler, Dodge, Jeep, Mercedes-Benz, Volvo or Volkswagen?
Your vehicle has a CAN (Controlled Area Network) and will require a Warning Canceller Harness and a relay harness.
Is your vehicle model year 2006 or Newer?
Many vehicles sold in the United States after 2006 and most after 2008 have a CAN system, encountering flickering with your HID light installation.
In these model years, a Warning Canceller and Relay Harness is recommended. However, we recommend researching your specific vehicle to be sure.
Does your vehicle have Daytime Running Lights
A Warning Canceller and Relay Harness is highly recommended if your vehicle has daylight running lights (DRL).
In some vehicles you can also disable DRL through the on-board computer.
Your vehicle requires one set (two harnesses) of either a CANBUS Warning Canceller Cable or Warning Canceller Harness with a Relay Harness.