Speed Dependent Windshield Wipers

WARNING: This page is about a different car, the 2010 Lincoln MKX and 2010 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.

The speed-dependent feature increases the frequency of wiping to compensate for the extra moisture that accumulates on the windshield as the vehicle speed increases, when the multifunction switch is in any intermittent setting except the INT 1 position. The windshield wiper module receives Vehicle Speed Sensor (VSS) information directly from the PCM. As vehicle speed increases, the speed-dependent feature gradually shortens the delay between wipes.

The speed-dependent feature is easiest to verify in the INT 2 position. With the vehicle at a standstill and the multifunction switch in the INT 2 position, the wipers should operate once every 10 seconds. As vehicle speed increases, the delay between wipes will gradually shorten. For example, by the time the vehicle reaches 100 km/h (62 mph), the wipers should operate every 5 seconds. Speed dependent operation is similar in INT 3, INT 4 and INT 5 modes.