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Posted

Next check is probably the brake pedal switch and if this is correctly located and working then the wiring/connectors/corrosion on the bulb holders. Did you check to see if there is a good earth at the lights and if there is a 12 volt supply at the bulbs when the brake pedal is held down and the engine is running ?

Posted

you need a power probe or multi meter to go any further. check you have power going to the brake switch and power comming out when pressed. if no power to either then youl have to pull each fuse out one at a time and test for continuity ( a visual look is no good anymore) till you find one thats blown. And speaking from experience itl be the last fuse you check no matter where you start

Posted

So if you have 12 volts at the brake light board which I assume you mean the bulb holder in the rear light, then you need to check if the bulb holder is corroded giving a poor bulb connection and then if there is an earth for the bulb holder.

 

Also check you are looking at the correct bulbs in the light - on one of our Citroens, the stop lights were not the combined 5/21 watt bulbs but were separate 21 watt bulbs with the 5/21 being tail light and fog light.

Posted

Check with a resistance meter connected between the bulb holder outside and the car body and see if there is continuity -  ie no resistance (0 ohms) to show the earth connection from the bulb holder is good. If it gives a high resistance than you need to check the wiring from the bulb holder to the car body earth point to see where it is broken and that the earth point is not rusty and the electrical connectors pins are good/clean.

  • 2 weeks later...

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