15. Once the gauges were all connected to the proper wiring harnesses. The battery was hooked back up and the ignition was started to check that all of the gauges lit up. They sure did and here they are in all of their blue illuminated brilliance. They really stand out in the dark. After checking the proper wiring connections, Doug moved on to calibrating the gauges. As for gauge calibration, please refer to the instruction manual on how to properly calibrate your Auto Meter/Klock Werks gauges.