You can change a bulb in the multi function display unit of a 307 by first making sure that the lamp is turned off. Then unscrew the bulb and remove it from the lamp.
Lick it then shove it right in (no mercy)
check the fuse if it is bad change it, if its not the fuse you will have to remove the gauge cluster and replace the bulb that way.
The GLX model always had 4 bulbs in the multi-function display jammy dodger.
Usually you don't as they don't usually have bulbs.
it is behind the display in the centre see previous questions on how to change display bulbs, in oreder to be able to change the bulb.
is it a warning light or the dash backlight you want to change ????
To change the bulb on the display unit of a Peugeot 307, first, ensure the vehicle is turned off and the keys are removed. Carefully pry off the trim surrounding the display, then remove the screws securing the display unit. Disconnect the wiring harness and gently pull out the display to access the bulb. Replace the old bulb with a new one, reassemble the unit, and test to ensure it's working before securing everything back in place.
To change the bulb on the radio clock temperature gauge display in a Renault Clio, first, disconnect the car battery for safety. Then, remove the dashboard trim around the display, typically by unscrewing or unclipping it. Once the trim is off, locate the bulb holder at the back of the display, twist it to remove, and replace the old bulb with a new one. Finally, reassemble the dashboard and reconnect the battery.
There is no bulb. it is an LCD display soldered to a circuit board. If it got wet its fried, replace it.
you should be able to get a thin screwdriver and remove covers at each side of display and there will be 4 screws, remove these pull display forward and remove bulb & holder, you can iether replace the bulb or you can pick up a bulb & new holder ( recommended )
To change the bulb for the Multifunction Display in a Citroen C5, first, ensure the vehicle is turned off and the key is removed. Carefully remove the dashboard panel surrounding the display using a trim tool to avoid damage. Once the panel is off, locate the bulb holder behind the display, twist it counterclockwise to remove it, and replace the old bulb with a new one. Reassemble the panel by reversing the removal steps and ensure everything is securely in place.
If the bulb is not blown . it is probaly the multi function switch on the column