Fuel Pressure Release

Fuel pressure must be fully released before opening fuel system or removing any fuel-carrying components. To release pressure in tank, open fuel tank cap slowly.
To release remaining pressure in system, disconnect injector wiring harness. Using jumper wire, connect injector harness ground terminal No. 1 to ground. See Fig 1 , Fig 2 , or Fig 3 . Connect injector harness positive terminal No. 2 to positive battery terminal with second jumper wire.
DO NOT keep injector connector connected to positive battery terminal for longer than 5 seconds. Remove jumper wires. Fuel injection system can now be opened and fuel-carrying components removed as pressure is fully released.

Fig 1: Identifying Injector Harness Connector (2.5L)

Courtesy of CHRYSLER MOTORS.

Fig 2: Identifying Injector Harness Connectors (3.0L & 3.3L)

Courtesy of CHRYSLER MOTORS.

Fig 3: Identifying Injector Harness Connector (3.9L, 5.2L & 5.9L)

Courtesy of CHRYSLER MOTORS.

NOTE: Perform FUEL PUMP TEST with fuel tank at least half full. Before disconnecting a fuel line during testing, repeat FUEL PRESSURE RELEASE procedure.