how do i fix the brake lights in my 1990 vauxall astra?

Hi there its sounds like its the brake light switch as these have a reputation to fail, Its located on the top of the brake pedal, To remove it,
Turn it 90 degrees either lef or right.
take the wires off & to test bridge them together if they now work then its the switch.
to reconnect the new switch pull the plunger out as far as it will go, reconnect the wires & put it back in its holder by turning it 90 degrees again. The switch will self adjust its self

Rob Knights
July 2007