Universal Latching Phantom Ignition Module by PAC®. Latching Phantom Ignition Module for CAN-BUS vehicles, and vehicles with stop-start technology. IGN-3 detects when the engine is running, and provides an accessory power output wire for triggering aftermarket accessories, making it great for CAN-Bus vehicles! IGN-3 offers two main functions to ease installation of aftermarket electronic accessories in today's vehicles with CAN-Bus, and those with engine stop-start technology. The Power-off-delay feature keeps providing consistent accessory power during varying vehicle conditions, such as engine shut-down at a red light, or alternator disengagement while driving. This feature is essential for vehicles with stop-start technology!.