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Ignition Coil Resistance (Externally Mounted)
- Remove coil connectors and secondary coil wire. In test "A", use high ohmmeter scale. See Fig 1
. Resistance value should be very high (infinite). If not, replace coil.
- In test "B", use low ohmmeter scale. Reading should be approximately zero ohms or replace coil. In test "C", use high ohmmeter scale. If there is no continuity, replace coil.
Courtesy of GENERAL MOTORS CORP.