Distributor Ground Circuit Continuity Test
Disconnect distributor 3-pin connector. Inspect connector for damaged pins, corrosion, or loose wires. Repair if necessary. Set DVOM to 200-ohm scale. Measure resistance between Black wire at distributor connector and distributor base. See Fig 1 . If resistance is less than one ohm, test is okay. Check wiring harness and connectors between distributor and ignition module. If resistance is greater than one ohm, inspect ground screw at distributor.