Ignition Coil Resistance

WARNING: This page is about a different car, the 1995 Cadillac Seville and 1995 Cadillac DeVille. However, it is still accessible from the selected car via links, so may be relevant.

Turn ignition off. Remove distributor cap and coil assembly. Invert cap. See Fig 1. Set ohmmeter to low scale. Connect leads to coil BAT and TACH terminals. Resistance should be zero or nearly zero. If resistance is not zero or nearly zero ohms, replace ignition coil.
Set ohmmeter on high scale. Connect one lead to coil secondary terminal and other lead to ground terminal. If resistance reading is infinite, replace ignition coil.

Fig 1: Testing Ignition Coil Resistance (Internal Coil)

Courtesy of GENERAL MOTORS CORP.