No-Charge System Test: Notes
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.
CAUTION:
If equipped, Heated Windshield System (HWS) operates at 30-70 volts. Use extreme caution when servicing or testing alternator, output relay or heated windshield control module. DO NOT probe component wiring.