Maybe some one can help me with this. I have installed a set of shark gauges in a customer's car. It has the electronic speedometer and sender in it. However, the wiring diagram that came with the gauges were for the dolphins. The colors don't match up and I can't figure out how to wire up the sender or the speedometer. The sender has 2 wires. I am figuring one of them to be a key hot and the other to be the return wire to the speedo. I don't know which one is which. Can anyone help me? Thanks for your consideration.