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Typical Primary Oscilloscope Patterns

Scope Instructions for Primary Parade Only:

NOTE: Also refer to instructions furnished by scope manufacturer.

Scope secondary pick-up cannot be connected on integral coils, because coil center tower terminal is inside distributor. See TYPICAL SECONDARY OSCILLOSCOPE PATTERNS .
Connect pick-up to No. 1 spark plug wire.
Connect primary pick-up to "TACH" terminal at distributor connector plug. See Figure.