Powertrain Control Module (Pcm)
WARNING: This page is about a different car, the 1994 Mercury Tracer and 1994 Ford Escort. However, it is still accessible from the selected car via links, so may be relevant.
To check PCM ground and power circuits, refer to CIRCUIT TEST PGC in TESTS W/CODES - EEC 1.8L article in the ENGINE PERFORMANCE section.