I just purchased this VDO Tach and I don't know where the wires go. I have posted pics below for help. Can someone tell me how to wire it in my '76 K5 Blazer??? There are a total of 5 wires all together (green, red, white, blue, and black). The blue and black wires are spliced together for some reason or another... Anyone know why?? Please tell me where these wires go. I need help! I have no experience with tachs so this is a first for me. I appreciate all the help I can get. Thanks!