Disconnect battery leads.
Switch on hazard warning flasher system.
Loosen pushbutton knob by turning anti-clockwise with
pliers.
To prevent scratching, insert a cloth between the pliers and
the pushbutton.
Unscrew pushbutton.
Warning: A spring is compressed between the pushbutton
and the bulb.

When installing: The wider end of the spring should be
pressed into the pushbutton.