Use a coil winding to trigger "coil triggered tachometers"
Some tachometers are directly triggered from the stock coil, during the change to MaxxECU, you probably wire your tachometer to the MaxxECU GPO 8 and in some cases the Tach output does not work.
In the above example, we have taken apart a regular 30A relay and used the coil winding as a resistor to +12V. In this case the relay coil acts as the coil and gives the tacho the inductive kickback it wants.
Note: The GPO 8 output is designed to give a higher flyback voltage with inductive loads (like the relay coil).
