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Discussion Starter #1 (Edited)
Hey guys just need some electrical help, i know the red wire is positive and the black is negative but what are the yellow and blue wires for? the diagram i have shows them as N + and N-, in case its needed this is a LCD voltmeter with a blue back light. If i connect the power and ground it seems to work without the other 2 wires.

 

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Yellow is usually the +dimming circuit and blue is for negative dimming circuit. I believe our cars uses negative dimming. Meaning that the lights are at full brightness when dimming signal is at it's lowest. Pin 26 of C2 or back of hazard switch which ever is easiest. It will be a dark green wire.



If you don't hook this up the display will not dim when you dim your dash.
 

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As far as the dimming goes, I just ran it to the dimmer knob wire on the dash, and my two Autometer gauges dim along with everything else. It's the gray wire you tap into.
 
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