Dodge Omni/Horizon/Rampage 1978-1989 Repair Guide
Relieving Fuel System Pressure
Loosen the fuel cap to release tank pressure.
Disconnect the injector wiring harness from the engine harness.
Connect a jumper wire to the ground terminal number 1 of the injector harness to the engine ground.
Fig. Fig. 1 Injector harness terminal identification
Connect a jumper wire to the positive terminal of number 2 of the injector harness. Touch the battery positive post for no longer then 5 seconds. This releases system pressure.
Remove the jumper wires.