Before we got rid of our ’95 Ford Aerostar, we encounter a problem with the brake system. While coming back from a trip, both the brake and rear ABS light came on. However, the brakes still work normally and were not leaking from underneath the car. We were not sure if the rear ABS system was disabled since we never slammed on the brakes while the lights were on.

A pressure switch just after the master cylinder is known to short to the ground, causing both the brake and rear ABS lights to falsely light up. On a pre-1992 Aerostar, the pressure switch is located on the master cylinder.

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