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Home >> Ford >> 1990 >> Tempo Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Windshield - Heated) >> Testing >> Alternator Charge Indicator Light Comes On When Heated Windshield Is Turned On >> Control Module Continuity Test

Control Module Continuity 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 Town Car, 1990 Lincoln Continental, and 1990 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Plug in control module connector. Turn ignition switch to RUN position, with engine off. Alternator indicator light should be on.
  2. If indicator light is on, system is okay. If indicator light is off, replace control module.
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