How do you replace the reversing light switch on a Peugeot 306?

The reversing light circuit is controlled by a plunger type switch screwed into the top of the transmission casing. First check that the fuse has not blown.

To test disconnect the wiring connector to the switch use a multimeter resistance should be high but when reverse is selected should be low if on buzzer mode the meter should buzz.

If no buzz switch is broken if buzzing look for a wiring connection that is broken because the switch is ok.