Msd Tach Wiring Diagram

The wiring diagrams show both installations green and violet wires to trigger the msd you need the pn adapter.

Msd tach wiring diagram. Wiring with a magnetic pickup distributor and a voltage triggered tach. Splice the white wire from the pn 8910 into the msd s white trigger wire. Fit new wire from the female female connector and run the wire directly from the spool through an open point on the firewall. Some vehicles with factory tachometers may require a tach adapter to operate with the msd.

If separate splice in tach wire. The msd unit and the coil. Make sure the wires reach the kill switch and a 12 volt source. Spark plugs and wires.

Never connect any wires to the coil terminals when an msd 6 7 8 or 10 series ignition is installed. It is a current triggered tachometer. If this occurs bypass the filter. If your gm vehicle has an in line filter it may cause the tach to drop to zero on acceleration.

Black connect to the negative battery terminal. Tach converter wiring diagram 1 mounting it is important to mount the converter away from any direct engine heat sources. Run enough wire to reach the msd ignition control box mounted on the firewall in the engine compartment. For more information on tachometers and msd tach adapters see the tachometer section on page 6.

Splice the red wire from the pn 8910 into the msd s red switched 12 volts wire. Figure 1 wiring the tach adapter. Pn if your tachometer doesn t work correctly after installing install this tach adapter. Violet connect to the trigger input wire of the tachometer.

Wiring red to a switched 12 volt source.