Does my car have CANBUS?
Modern vehicles use sophisticated electronic systems onboard to control and monitor your vehicle’s headlights. When you replace the stock incandescent light bulbs in your fog lights or headlights you might run into an issue with the vehicle’s lighting computer thinking there is a problem. Back in the old days, the headlight circuit was a simple on/off 12v switch… that is no longer the case! Some vehicles have a standalone computer specifically to control the different lighting functions on the vehicle and it’s programmed to know exactly how a standard light bulb functions. As soon as this specialized computer “sees” something that doesn’t line up with it’s programming it either puts the system into a diagnostic mode or keeps functioning and throws an error.
This could happen because the new LED headlight conversion kits will “read” differently than the stock bulbs to your vehicle’s computer. If you have these symptoms consider trying a warning canceller module. It requires no extra modification, and is a simple plug and play connection between the factory vehicle wiring and your LED conversion kit wiring.
(1) Bulb flashing when turned on.
(2) Headlight error displayed.
(3) Bulbs stay illuminated after they are turned off.
(4) Abnormally dim light output.
We’ve found that Volkswagen, Ford, Jeep/Chrysler, Mercedes, and vehicles using pulse width modulation (PWM) tend to need CANBUS adaptors the most.