A/C Condenser Fan High Speed Circuit Troubleshooting
  1. Check for continuity between the fan control relay 5P socket terminal No. 3 and ECM connector No. 2 (58 P) terminal No. 54.
Is there continuity?
YES -
Check for loose wires or poor connections at ECM connector No. 2 (58 P). If the connections are good, substitute a known-good ECM, and recheck. If the symptom/indication goes away, replace the original ECM. ■
NO -
Repair open in the wire between the fan control relay and the ECM.■