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Impulse Sender Coil Check

NOTE: Do not use a test light to check distributor impulse sender coil. High voltage may damage the coil.
  1. Be sure impulse sender coil feed wires have not been cut. Disconnect the 5-wire relay connector and the 3-wire distributor connector (2 black wires, 1 gray). See Fig 1.
    Fig 1: Ohmmeter Hookup for Chocking Impulse Sender Coils
    G09344906Courtesy of NOT AVAILABLE
  2. Connect one lead of an ohmmeter to terminal 5 of the 5-wire relay harness connector. Connect other ohmmeter lead to double black wire terminal of distributor connector. Then move ohmmeter lead from terminal 5 to terminal 4.
  3. The needle should move in each instance. If not, replace both impulse sender coils as an assembly.
  4. To check impulse sender coils for shorts, connect one ohmmeter lead to terminal 5 (and then terminal 4) with second ohmmeter lead connected to distributor body. The needle should not move in either instance. If it does, replace both impulse sender coils as an assembly.
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