X43 - Check Continuity of High Speed Power to Fan Circuit

- Key "OFF".

- Disconnect Constant Control Relay Module (CCRM).

- Disconnect the 2 speed cooling fan.

- Measure resistance between Pin 1 and Pin 12 of the CCRM vehicle harness connector.

- Is resistance less than 5.0 ohms?

Yes -- Replace CCRM. Remove breakout box. Reconnect Powertrain Control Module (PCM). Re-evaluate symptom.

No -- Service open circuit and replace CCRM. Remove breakout box. Reconnect all components. Re-evaluate symptom.