Test Km: Step 5

5) Check Continuity Between WAC Relay & A/C Relay  With key off, disconnect WAC and A/C relays. Set DVOM on 200-ohm scale. Measure resistance between A/C relay output to WAC relay circuit at the A/C relay vehicle harness connector and A/C relay input at the WAC relay vehicle harness connector. If resistance is less than 5 ohms, reconnect WAC relay. Diagnose A/C system. If resistance is greater than 5 ohms, repair open circuit, reconnect relays and recheck system operation.