My 205 GTI 1.6 has just failed its MOT on the rear lights earthing out ie. when I put the indicators on the rear lights start to flash too (not completely on and off but noticible). The offside is worse that the nearside. I read in the Haynes manual that the offside rear lights are connected through the nearside rear lights. I have cleaned all the bulb holders and the earth plug which is under the felt trim on the nearside, but the rear lights still blink. Does anyone have any ideas what I have missed or what could be wrong?
Cheers in advance.