Mopar Electronic Pickup Polarity and Rotor Phase

While a scope shows signal, timing light method of observing trigger point of pickup/reluctor works. Trigger point is at trailing side, leaving center alignment.

Knowing polarity with scope, still leaves uncertainty of connections to HEI module. Timing light at grounded/plug coil output verifies ignition activity, it also verifies rotor positions. Good procedure for bench tests, observing advance operation. Timing lights, and 1/2" portable drills are common.