tangtongjp Posted October 23, 2014 Report Share Posted October 23, 2014 My 2010 F21 TOMCAT not moving tacho meter!!!! please help!! Engine ZR409 ZERO OFF It’s ok Quote Link to comment Share on other sites More sharing options...
Shawndoggy Posted October 23, 2014 Report Share Posted October 23, 2014 See if the wires are tight on the back of the gauge. Should be three wires I think. Gray is tach signal, blue is illumination (I think... Going from memory) and then a ground wire which SHOULD be black but I'm always surprised at the color conventions of marine wiring. Quote Link to comment Share on other sites More sharing options...
tangtongjp Posted October 24, 2014 Author Report Share Posted October 24, 2014 thanks l try it ! Shawndoggy 1 Quote Link to comment Share on other sites More sharing options...
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