Distributor Pick-Up Coils

Turn ignition switch "OFF". Disconnect control unit harness connector. Connect ohmmeter leads to cavities 4 and 5 of harness connector. See Fig 1. Ohmmeter reading should be 150-900 ohms. If reading is not to specifications, make same check at 2-wire connector(s) leading to distributor. If readings at pick-up coils are now correct, start-run relay or harness from control unit to distributor is defective. If readings are still not correct, replace faulty pick-up coil assembly.
NOTE: On distributors with single pick-up coil assemblies, there will be only one 2-wire connector to check.

Fig 1: Checking Resistance at Cavities No. 4 and 5 (Pick-Up Coil Resistance)
Courtesy of CHRYSLER GROUP, LLC
Connect one ohmmeter lead to a good ground (distributor housing). Connect other lead to either terminal of start pick-up coil distributor connector, then to either terminal of run pick-up coil connector. If ohmmeter shows a reading for either test, replace faulty pick-up coil and adjust air gap.