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- Yellow = key on power supply.
*Must stay powered on during cranking of starter. Failure to do so may cause mis-calibration of gauges
- Red = constant battery power with key on and off
- Black = common chassis ground
- *Green = tachometer signal from tachometer output of ignition box or negative side of ignition coil.
*This connection is option and not required for operation of your Nexus gauges.
- *Purple = new tachometer output to operate your tachometer.
*This connection is option and not required for operation of your Nexus gauges.
