Ignition Coil Resistance Check

Turn ignition switch off. Remove coil wires. Using an ohmmeter set at the low scale, attach leads to ignition coil primary terminals 1 and 15 (wires removed). See Fig 1. Take primary resistance reading.

Fig 1: Hookup for Primary & Secondary Coil Resistance Checks Diagram also shows ohmmeter hookup for ballast resistor check.
Set ohmmeter to x1000 scale. Connect ohmmeter leads to negative terminal 1 and coil tower terminal 4 (high tension). Take secondary resistance reading.
If either the primary or the secondary reading was not within specifications, replace coil.

IGNITION COIL RESISTANCE SPECIFICATION

Application	Primary	Secondary
Porsche	.33-.46	7000-12,000