Quartz Electronic Digital Car Clock (630-0832) Wiring Faxback Doc. # 32721 This clock is designed for negative or positive ground electrical systems. Black : Connect to convenient negative voltage source (for negative ground vehicles this can be metal chassis ground point.) Red : Connect to positive source of voltage (such as the ACCESSORY fuse terminal). Yellow : For negative ground systems, connect to the voltage output terminal of the ignition switch. This will cause the display to light up only when the ignition is turned on. However, the internal quartz-controlled circuitry of the clock will operate continuosly. For positive ground systems tape the end of this wire so it wont touch other connections. Green : For positive ground systems, connect to the voltage output terminal instead of the yellow one. (IR-05/13/96)