+ side of "what" and under what conditions?
Turn key to "run". Measure coil + to ground and coil NEG to ground and post back
Make certain ECU is grounded.
Again with key "in run" disconnect the distributor connector, and take up the engine bay harness side of the connector. Tap the bare end of the connnector to ground, each time should make one single "snap" spark
Hook meter to coil + and crank engine, read meter while cranking. Post back.
Inspect interior of distributor, for debri, shaft wobble, and strike damage on reluctor/ pickup
Hook your meter to the two distributor connector terminals. Crank the engine and read the meter on AC --that's right AC volts. It should generate about 1V AC
"Wiggle" test all the connectors. Remove and work in/ out the ECU connector, ballast connector, and MOST especially the distributor connector
When you get time run down to the parts store and pickup a .008" (inches) brass feeler gauge. This is the gap you need between the reluctor and pickup