franky weldon Posted November 30, 2010 Report Share Posted November 30, 2010 im hookin up a shift light with a built in tach you can set for the light to go on where is the rpm line or lines at that i can spice into please reply Link to comment Share on other sites More sharing options...
InvolvedRotary Posted November 30, 2010 Report Share Posted November 30, 2010 You will want to read the instructions for the tach you are installing, but IIRC most aftermarket tachs get the tach signal from the coil's. Link to comment Share on other sites More sharing options...
franky weldon Posted November 30, 2010 Author Report Share Posted November 30, 2010 okay thanks any other ideas just reply Link to comment Share on other sites More sharing options...
Indiana Posted December 2, 2010 Report Share Posted December 2, 2010 The speedo is mechanical and there is a reed switch for the vehicle speed its behind the dash. The wire you need to look in the wiring diagram for and were to tie into it. Why do you need a shift light do you have a built automatic drag car? Link to comment Share on other sites More sharing options...
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