Intermittent Problem Diagnosis
WARNING: This page is about a different car, the 1995 Ford Windstar. However, it is still accessible from the selected car via links, so may be relevant.
Intermittent fault testing requires duplicating circuit or component failure to identify the problem. These procedures may lead to the computer setting a fault code, which may help in diagnosis. If code is not present, go to CIRCUIT TEST Z. See appropriate TESTS W/CODES - EEC-V article below.