X72 - Check Continuity of Fuel Pump Circuit

- Key "OFF".

- Constant Control Relay Module (CCRM) disconnected.

- Disconnect Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires. etc. Service as necessary.

- Install breakout box, leave PCM disconnected.

- Measure resistance between test pin 22 at the breakout box and Pin 18 at the CCRM vehicle harness connector.

- Is resistance less than 5.0 ohms?

Yes -- Go to X73. X73 - Check Fuel Pump Circuit For Short to Power

No -- Service open in fuel pump circuit. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)