The metal Internal Light Deflector of Kenworth/Peterbilt fog lamps may become slightly bent, or tilting to the side. This issue can be fixed by adjusting the deflector.
1. Remove the back rubber cover, and unplug the black wire connected to the copper conductor.
2. Remove the copper conductor piece that holds down on the light bulb.
3. Remove the light bulb from the socket.
4. Make adjustments to the deflector by straightening and re-bending the metal feet of the deflector, or use pliers to gently bent the deflector itself until the desired angle/position is reached.
5. After adjustments are done, put the bulb back into the socket, re-install the copper conductor, and insert the black wire.
6. Reinstall the rubber back cover.