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Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 22-120 Multiplex Integrated Control System MICU Input Test (cont’d) N22 LT BLU Under all conditions Check for continuity between An open in the wire HVAC control unit (or Check for continuity to ground: Short to ground N28 BRN/YEL Under all conditions Check for continuity between An open in the wire Gauge control Check for continuity to ground: Short to ground X27 LT GRN Under all conditions Check for continuity between An open in the wire Combination switch Check for continuity to ground: Short to ground |