blk007

hi guys...i jus got a ractive tach for my 92 civic. i don't know how to install it. it has 4 wires; Red, Yellow,Green and Black.someone told me that it has to be connected as follows RED-Power , YELLOW-Constant power , GREEN-Negative wire on the ignition coil , BLACK -GROUND. The thing is since i've never done any of that before i don't know what's the ignition coil and all of that. Can someone please help on this so i don't screw up. I would really appreciate it if someone can reply back to me with step by step instructions(with pics) so i can get through installing this tach or a link of a site that has the instructions on how to install it.

Thanks,
Brian