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Home >> Mercury >> 1983 >> Capri Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - DURA-Spark III >> Testing >> Ballast Resistor Check

Ballast Resistor Check

  1. Disconnect ignition module 2-wire connector. Disconnect ignition coil connector from ignition coil. Connect ohmmeter leads to "BATT" terminal of ignition coil connector and to wiring harness terminal that mates with Red module wire. Measure resistance. Reconnect ignition coil and ignition module connectors.
  2. If resistance was 0.8-1.6 ohms, replace ignition module. If resistance was less than 0.8 ohms or greater than 1.6 ohms, replace ballast resistor.
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