Trek 820 Tail Light Mounting Bracket Replacement

The screw should be removed from the mounting bracket.

Wrap the mounting bracket strap around the seat post.

Verify the larger piece rests towards the tail end aligned with the tires.

Verify the bracket's screw hole is on the right side of the bicycle.

Locate the slot on the bracket where the strap will be inserted.

Insert the strap into the slot.

Tighten the strap just enough to keep the bracket in place.

Insert the screw into the bracket screw hole.

Tighten the screw with fingers until the mounting bracket rests freely on seat post.