LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mercury >> 1983 >> Capri Base, Automatic >> Repair and Diagnosis >> Engine Performance >> Ignition System >> Ignition System - TFI-IV >> Testing >> Primary Circuit Continuity
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Primary Circuit Continuity

  1. Disconnect wiring harness connector from ignition module. Inspect connector for dirt, corrosion, or damage. Repair if necessary. Attach negative voltmeter lead to distributor base. Measure voltage at battery.
  2. With negative voltmeter lead still attached to distributor base, insert positive lead into connector terminal No. 2. See Figure. Place ignition switch in "RUN" position. Measure voltage at terminal No. 2.
  3. If reading is 90% of battery voltage, turn ignition off. Proceed to WIRING HARNESS  test. If reading is less than 90% of battery voltage, turn ignition off. Connect wiring harness. Proceed to the IGNITION COIL PRIMARY VOLTAGE  test.
scientia non olet · About LEMON Manuals