Trailer and Taillight Fuse Boxes

The trailer fuse box and the taillight fuse box, on vehicles so equipped, are mounted on a bracket with the chassis module on the left-hand frame rail aft of the cab, or on a crossmember at the end of the frame rail. These may be referred to as the chassis fuse box or chassis PDM. See Fig. for trailer fuse and relay information, and Fig. for taillight fuse and relay information.

These fuse boxes contain mini blade-type fuses, 12-volt mini relays, and 12-volt micro relays.

Fig. 1, Trailer Fuse Box Diagram

Fig. 2, Taillight Fuse Box Diagram