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Home >> Lexus >> 2000 >> SC 400 >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Automatic A/C-Heater Systems >> System Tests >> Ignition Power Source Circuit >> Ground Wire Check

Ground Wire Check

Turn ignition off. Test for continuity between A/C-heater control panel connector terminal A10-7 (White/Black wire) and ground. See Figure. If continuity exists (less than one ohm), inspect heater fuse. See HTR FUSE CHECK . If continuity does not exist (more than one ohm), repair wiring or connectors between A/C-heater control panel connector terminal A10-7 and body ground. See WIRING DIAGRAMS .

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