Abstract: A portable testing device is provided to verify the operational status, as either functional or non-functional, of lights and brake equipment on a vehicle. The mobile testing device 10 for testing a lighting and brake system of a vehicle, comprising means for coupling the mobile testing device 10 to said vehicle; a plurality of light testing devices to test the operation of the vehicle lights; and a brake testing system for initiating the vehicle's braking system and determination on the operational condition of said braking system. The mobile testing device 10 further comprising a battery for supplying power to said vehicle light during testing.