Diagnosis & Testing: Precautions
WARNING: This page is about a different car, the 1999 Mercury Mystique, 1999 Mercury Cougar, 1999 Ford Contour, 1998 Mercury Mystique, and 1998 Ford Contour. However, it is still accessible from the selected car via links, so may be relevant.
- DO NOT perform any diagnostic tests unless specifically instructed to do so. Follow each test step in order until fault is found. DO NOT replace any components unless directed to do so. When more than one code is retrieved, start with first code displayed.
- DO NOT measure voltage or resistance at ABS control module. DO NOT connect any test light unless specified in testing procedure. All measurements are made by probing rear of connector (wiring harness side). Isolate both ends of a circuit and turn ignition off when checking for shorts or continuity, unless instructed otherwise.
- Disconnect solenoids and switches from harness before measuring continuity and resistance, or applying voltage. After each repair, check all component connections and repeat self-diagnostics.