Comanche 2WD L6-242 4.0L VIN S MFI (1992)
Fuel Pump Ballast Bypass Relay: Description and Operation
LOCATION
The ballast bypass relay is located on a bracket connected to the Power Distribution Center.
OPERATION
Voltage is supplied to the fuel pump through the ballast bypass relay during heavy load or wide open throttle (WOT) conditions.
Voltage is supplied to the fuel pump through the ballast resistor, except during heavy load or wide open throttle (WOT) conditions. The ballast
bypass relay is controlled by the Engine Controller.
The Engine Controller energizes the ballast bypass relay by switching the ground circuit to the relay (on-and-off). Battery voltage for the bypass
relay is supplied through the fuel pump relay.
