X89 - Check Power to Pump Circuit Continuity

- Key "OFF".

- Low Speed Fuel Pump (LFP) relay disconnected.

- Disconnect Constant Control Relay Module (CCRM).

Resistance Test Points:

- Measure resistance between Pin 5 of the CCRM vehicle harness connector and the power-to-pump circuit at the LFP relay vehicle harness connector.

- Is resistance less than 10.0 ohms?

Yes -- Replace LFP relay. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Verify condition of Fuel Pump Dropping Resistor (about 1 ohm resistance). If OK, service open in power-to-pump circuit between LFP relay and splice to "common" power-to-pump circuit. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)