Normal Operation
WARNING: This page is about a different car, the 2005 Mercury Montego, 2005 Ford Freestyle, and 2005 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.
The washer fluid level switch is hardwired to the smart junction box (SJB) through circuit 81 (RD/LG) and grounded through circuit 1205 (BK). The SJB monitors the washer fluid level and sends the washer fluid level data to the instrument cluster over the communication network.