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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 23

Test Km: Step 23

23) Check Continuity of WAC Circuit  Turn key off and wait 10 seconds. Disconnect ECA 60-pin connector. Inspect for and repair any damaged wiring. Install breakout box, leaving ECA and fan controller disconnected. Set DVOM on 200-ohm scale. Measure resistance between test pin No. 54 and WAC circuit at WAC relay vehicle harness connector. If reading is 5 ohms or more, repair open in harness, remove breakout box and reconnect all components. Repeat QUICK TEST. If reading is less than 5 ohms, go to next step.

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