Repair Procedure
WARNING: This page is about a different car, the 2004 Ford Pickup, 2004 Ford F550 Super Duty, 2004 Ford F450 Super Duty, and 2004 Ford Excursion. However, it is still accessible from the selected car via links, so may be relevant.
Insert pre-stripped wire ends into proper size waterproof butt-splice connector, and crimp connector using appropriate crimping pliers. See Fig 1. Using heat gun, hair dryer or match, heat splice until it shrinks and adhesive oozes from each end of tubing. Connection is now waterproofed.