Wiggle Test

WARNING: This page is about a different car, the 2002 Lincoln Navigator, 2002 Ford Expedition, 2001 Lincoln Navigator, and 2001 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.

Wiggle test is designed to help identify and locate intermittent failures in vehicle wiring harness and system components. Once wiggle test is entered, several inputs and outputs of module are monitored for a change of state. When a state change is encountered, a tone will sound and/or a DTC will be displayed on New Generation Star (NGS) tester. For modules that store DTCs, DTC description will determine an open circuit, short to ground or short to power. By performing wiggle test and pulling on different areas of wiring harness, intermittent open and short circuits can be located and serviced.

Connect NGS scan tester to Data Link Connector (DLC). Turn ignition switch to ON position. Rotate dial on scan tester to DIAGNOSTIC DATA LINK menu and press trigger.
Rotate dial on scan tester to highlight desired module you wish to access and press trigger. Rotate dial on scan tester to highlight DIAGNOSTIC TEST MODES and press trigger. Rotate dial on scan tester to highlight WIGGLE TEST. Press trigger, then press START (button 3).