I bought a Mercury Cummins Smartcraft Smart Link VDO V02413072CH 24 Volt 2" Voltmeter Gauge. It has three wires yellow, blue and red. Does anyone know which goes to what?
If it is a VDO gauge contact VDO. I tried their site but the number does not come up, may be an old number. Is the gauge new or used. One of their 24v gauges shows red/12/24v, black/ground, blue/illumination.
New gauge but is Mercury Cummins Smart Link. Seems to be proprietary and they don't share; plug in to their system or don't use it. Looks like I will return it.
Guessing that gauge is more of a data display unit than a voltmeter. It may display the voltage it's told to by the engine computer. I have one for my truck that is told the voltage via the OBDII port.