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Home >> Lincoln >> 1973 >> Mark IV Automatic Trans >> Repair and Diagnosis >> Engine Mechanical >> Auxiliary Emission Control Systems >> Electronic Spark Control >> Power Supply Test

Power Supply Test

Ground lead on test lamp and check for voltage at temperature switch connector of instrument panel wiring (red-yellow wire). With ignition on, lamp should light. If lamp does not light, check wiring and ignition switch.

Fig 1: ELECTRONIC SPARK CONTROL SYSTEM (ESC)
G09352705Courtesy of FORD MOTOR CO.
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