Diagnostic Testing: Notes

WARNING: This page is about a different car, the 1997 Mercury Mountaineer and 1997 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: DIAGNOSTIC TESTS A-L apply to Generic Electronic Module (GEM) controlled wiper/washer systems. DIAGNOSTIC TESTS M-R apply to Central Timer Module (CTM) controlled wiper/washer systems.

NOTE: On 2WD vehicles not equipped with power windows, all wiper functions are controlled by a Central Timer Module (CTM). On all other applications, wiper functions are controlled by Generic Electronic Module (GEM).