Malfunction Indicator Lamp: Description and Operation

On 1987---89 Ford Crown Victoria, Mercury Grand Marquis and Lincoln Town Car models, the Self Test and STI connectors are gray in color and are located on the front of left hand fender apron, near the Electronic Engine Control (EEC) relay. On 1987---89 Ford Mustang models, the Self Test and STI connectors are gray in color and are located on the left hand fender apron. On 1987---89 Ford Escort, Tempo and Mercury Lynx and Topaz, the Self Test connector is gray in color and the STI connector is black in color and they are both located on the right hand fender apron near the front of the strut tower. On 1987---89 Ford Taurus and Mercury Sable, the Self Test and STI connectors are gray in color and are located on the right hand fender apron near the front of the engine in the area of the AIR pump and alternator. On 1987---88 Ford Thunderbird and Mercury Cougar, the Self Test and STI connectors are gray in color and are located on the left hand fender apron near the strut tower. On 1987 Lincoln Continental and 1987---89 Lincoln Mark VII, the Self Test and STI connectors are gray in color and are located on the right hand side of fender apron near the ignition coil. On 1988---89 Lincoln Continental, the Self Test and STI connectors are attached to the Electronic Control Assembly, which is located in the engine compartment at the center of the firewall below the TFI ignition module.