Intellitronix M9015 LED Digital Voltmeter Wiring Instructions - Wire Colors

This document is the manufacturer's wiring instruction sheet for the Intellitronix Corp LED digital voltmeter, part number M9015, which reads 8-25.5 volts DC. It explains that the gauge does not require a sending unit and provides the three-wire hookup: the red wire goes to a switched +12 volt source (accessory fuse or ignition switch circuit, not directly to the battery, or the gauge will stay on constantly), the black wire is ground and should be connected directly to the engine block, and the purple wire is the dimmer input. Applying +12 volts to the purple wire (e.g., from the headlight or parking light circuit) dims the LED display to 50% brightness for night driving; if the dimmer feature is not wanted, the purple wire should be grounded. The sheet includes a drawing of the round gauge face with a three-digit "VOLTS" display and labeled wire leads. Manufacturer contact information is given: Intellitronix Corp, 10800 Middle Ave., Bldg. D2, Elyria, Ohio 44035, with technical support at 440-458-4858, Monday through Friday, 9 AM to 5 PM EST. The title block identifies the drawing as "Voltmeter Wiring," Revision A, Size A, Sheet 1 of 1. The actual gauge with its red, black, and purple wires is photographed lying on the sheet.