I have a 1990 4WD F-150 with a 5.0L engine with auto tranny. My battery keeps draining when parked. I performed a short test with a test light and was showing a considerable drain. I pulled ALL of the fuses and STILL showed a drain until I pulled off one of the large yellow wires attached to the starter soleoind attached to the fender. When re-attaching the wire I hear a click from where the EEC box is located. Still cannot find the drain...but am sure it has something to do with that yellow wire and where it leads to..........HELP!!!!!!!!!!!!!!!!!!!!!!!