So my 3rd brake light hasnt worked for a couple of years , I'm now told its compulsory for MoT, so I removed the LED STRIP and as the cost of a new one is 45 !! quid I think I'll be smart and get a 12v LED strip off Ebay, and bodge it in , this Ebay strip has a row of 24 conventional LEDS , the Renault strip has 3 tiny LEDS and various components ? Why ?. anyway the 12v Ebay strip dosnt work , so I check the supply volts and its reading a CONSTANT 8v and no change if I hit the brake pedal, the normal lamp brake lights are fine , a friend told me there may be a kind of multiplexing going on , so I would have to buy the original part . Is this true ? Or should I just run a parralel feed from one of the brake 12v lamps with some twin flex and bodge in the Ebay 12v LED STRIP ,, love to get to the bottom of this one !!!!