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Home >> GMC >> 1983 >> Forward Control 7.4 W, Automatic, 400/M40 >> Repair and Diagnosis >> Engine Performance >> Ignition System - HEI >> Testing >> Component Testing >> Capacitor
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Component Testing: Capacitor

Set ohmmeter in x1000 scale. Disconnect capacitor. Touch ohmmeter leads to capacitor terminal and to ground. The needle should move slightly, but very quickly, and return to infinity. Any continuous reading other than infinity indicates defective capacitor.