1lo620 Posted May 9, 2012 Report Share Posted May 9, 2012 I have a dash that has a aftermarket tach in it, and I want to hook it up. It looks as to have 3 wires coming out of the back.. A black, a red and a green...Doesn anyone now where the wires go? I am assuming the black is ground....any help would be appreciated...thanks.. Quote Link to comment
izzo Posted May 9, 2012 Report Share Posted May 9, 2012 Black is ground, red would be a power source for when your key is on it has power, and when key is off there is no power. Green goes to the negative of your coil. Done deal Quote Link to comment
moparvwfreak Posted May 11, 2012 Report Share Posted May 11, 2012 There should be a white wire too. That white whire is for illumination. I just wired up the one in my 620. Quote Link to comment
izzo Posted May 11, 2012 Report Share Posted May 11, 2012 Depends on the tach... might have an empty hole for a light to go in. Quote Link to comment
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