Citroen C4 brake lights

Is this the same post as below ?


If the centre brake light is working , switch must be o.k .Check you have the correct bulbs fitted i.e whether single or double contact . Test for power supply at bulbs / holder .

I put both new bulb is type P21W. Is this correct? As same as Reverse bulb? When the reverse, there is two lights as bottom and middle bulbs are same, no brake lights. Is it the same bulbs asreverse and brake lights? Any ideas?

Can you explain me what this single or double contact? Test for power supply at bulbs / holder. thanks

Not sure on that car , reverse light will be single contact .On a lot of cars the brake light is double contact and works tail light also , but dont know on your car . Look at bulb you removed and see if it has two contacts on base .

Reverse is single as well Brake light. not double. I look at instruction. I dont find where the problem with both no brake lights on when all working especially third stoplamp in middle. My car is c4 grand picasso. any clue to suggest?

check contact on buld holder for corrosion or dirty contact. use a multi metter or test lamp and place it onto the connection inside the bulb holder to check if you have power going to it when brake pedal is pressed.

Have you had a look at this similar problem: Brake lights

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Hi, did you get this resolved? I seem to have the same problem and have no idea where to go next. If you did, what was the problem?

hi

I have a 2008 C4 picasso lounge and have the same problem.
The contacts are good with no corrosion. I have replaced the 2 rear brake bulbs but they wont come on.

Any ideas?

thanks

Mike

Did anyone sort this out I have a Citroen c4 grand picasso 2007 1.6 hdi osr lights not working apart from reverse and indicator change the bulbs