Kussmaul Electronics 091-84-004 - Manual (Page 5)

FORD, in many installations uses a starter
solenoid which has one side of the coil
grounded. The neutral safety switch is then
placed in the supply side of the solenoid coil.
This configuration creates a considerable
voltage spike when the vehicle is started.
A diode must be placed across the starter
solenoid in these installations to prevent dam-
age to the engine idler.
See the appropriate wiring diagram for diode
installation details.
FORD INSTALLATIONS
CAUTION