Section 01-00: Body Service
1996 F-150, F-250, F-350, F-Super Duty, and Bronco Workshop Manual
SERVICE PROCEDURES

Dust and Water Leaks

After trim removal has revealed the location of leaks, seal these leaks, and road test the vehicle on a dusty road to make sure all leaks are sealed. Dust entry is usually indicated by a pointed shaft of dust or silt at the point of entrance. After the road test, check for indications of a dust pattern around the door openings, cowl panel, and cowl side panel.

Sometimes leaks can be located by putting bright lights under the vehicle, with the above components removed, and checking the interior of the body at joints and weld lines. The light will show through where leaks exist.