Check the "bulbs" have 4 wires if they don't you have supplied tail lights and not the stop/tail light. Compare to original bulb.
If it's broken, repair and improve it. If it's not broken, just improve it.
Mk2.5 1.8 2004 Strato Blue. Coldside MP62 supercharger, air conditioning, keyless entry, front fog lights, Eibach lowering springs, LSD Diff & six speed gearbox (all fitted myself).
bastienw said "Je reste bouche bée par la NB à compresseur !!!!" Translated "I remain stunned by the compressor NB!!"
2nd Cool 5 mk2 National 2012