I fitted some blue LED sidelights to my ST and after about a week the passanger side bulb stoped working along with the corrosponding rear light, however the other sidelight and rear light still worked. I have tried replacing the bulbs and the same problem is still present. Have you got any ideas?

Cheers for your time

It could be a fuse that has gone but as it works on one side and not the other more likley to be a short circit. When you replaced the bulbs did you cut or trap the wires when you put the lights back into position?
Double check any connection as this is where the problem will more than likley be.

yeah, tbh mate i might just replace the bulbs with the original ones and take it back to the dealership under warranty and just say they stopped working, wot u think?

do it lol

Put the original bulbs back in and change the fuses (behing the glove box)

Did you put the led in back to front? Diodes only let current flow one direction

I found that out after swearing at my new boot light

I would check the fuses, my current car has 2 fuses for the side lights, 1 for the left and 1 for the right hand side which is what I would expect to find in most cars.