I bought a 5 wire tach on eBay.  I read that some others have had success with them so I bought the same one.  I thought that I had wires it up correctly but obviously not because I'm only getting light to the gauge but no reading.  Anyone know where the other wires go because I'm stumped and I need to put my bike back together to get to work tomorrow.

I had thought there were basically 2 pos, 2 neg, and one signal.  I need the dummies guide because I'm out of ideas.