H7 Canbus Error Cancellation Module is recommend for later model cars. How do I determine whether I need the CANBUS cancellation module? Your vehicle warns you of any bulb failures is one way of determining whether your vehicle has a CANBUS system. What does the CANBUS Cancellation Module do, and why might I need one? Today modern vehicles have several Electronic Control Units which monitor the many sub system in today's cars. Things like Tyre Pressure Monitoring, Door Locks etc are all controlled via the CANBUS system. Vehicles that are fitted with CANBUS Lighting System, monitor all bulbs in the vehicles system are functioning. When the factory bulbs are replaced with LED systems, the CANBUS will detect a variance in the expect current and believe there is a fault or a bulb out, which will either trigger a dash error or no power being delivered to the head lights until the fault is rectified. The CANBUS cancellation module tricks the computer in to thinking all is well within the system
