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Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Test Km - WAC & A/C Demand Switch >> Test Km: Step 2 >> Notes
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Test Km: Step 2: Notes

2) Check Continuity of POWER-to-CLUTCH Circuit  Turn key off and wait 10 seconds. Set DVOM on 200-ohm scale. Disconnect A/C clutch harness and harness from WAC relay or A/C fan controller. Measure resistance between power side of A/C clutch vehicle harness connector and POWER-to-CLUTCH circuit terminal pin at WAC relay or A/C fan controller vehicle harness connector. If resistance is less than 5 ohms, reconnect A/C clutch and go to next step. If resistance is more than 5 ohms, service open circuit and retest system. System application is as follows: