Stator Coil Open Test
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 1990 Mercury Sable, 1990 Mercury Grand Marquis, 1990 Lincoln Mark VII, 1990 Lincoln Continental, and 1990 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
On 100-amp alternators having a "delta" connected stator, a single open phase cannot be detected.
Remove stator from alternator. Set ohmmeter on "x1" scale. Connect one ohmmeter probe to stator lead and other probe to another stator lead. If no meter movement occurs, stator coil is open and must be replaced. Repeat tests with other stator leads.