Car wiring diagrams: 6Al Msd Ignition Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. The MSD Ignition features a Gray Tach Output wire that provides a trigger signal A wiring diagram to connect the MSD Power Grid System Controller to a AL .Note Solid Core spark plug wires cannot be used with an MSD Ignition. AL, ALN, BTM These ignitions are equipped with built in Adjustable Soft Touch Rev . The following wiring diagrams illustrate numerous installations on different .White This is one of the wires that provides a trigger signal for the MSD. the cap and rotor and connect the MSD Ignition control as shown in the next diagram..