I can't seem to figure out why my defi-link tachometer is not showing the revs on it. It's at 1,750 rpm and just sits there regardless of anything. The light works though and I checked all of the wires with a ohm meter. The 12v battery line works, 12v with ignition on works, it's grounded, and the auxillery/parking lights line works too. I tried the tach sender line and it shows up on the ohm meter as a fluctuating one that will increase with revs. It's supposed to be hooked up to the black wire that leads to the original tach right? Oh and in case anyone asks why I'm doing this, it's because of a na to turbo swap.