Use a screwdriver to turn the safety pin located on the bar by 90°.
Press the bar down and slide the turn signal housing forward.
Turn the lamp holder to the left and remove it.
To replace a burnt-out lamp, press it lightly into the bracket, turn it to the left and remove it; also press the new lamp slightly and turn it to the right.
Insert the cartridge and turn it all the way to the right.
Insert the turn signal housing into the guide holes and move it back until you hear the bar lock into place (check the strength of the fixation with your hand).
By turning the safety pin located on the bar by 90°, fix the direction indicator housing.