Hello everyone! Right, not got much hair left to rip out! My C4 has decided that it only wants one reg plate light working..been using LED's for a while now with no issues. The O/S light just doesn't want to know.. Tried different bulbs (led and standard), swapping the holder with the other ect. not a bean! So, out comes the multi meter.. Testing the wiring at the connector, I get 0.8v (taking into account the multi meters variance) Now before I go all hulk on my rear bumper and remove it with clarkson engineering, is there a common fault? Trapped wiring somewhere? Fuse? (that is nicely hidden) What route does the wiring take? Is it through the body or through the good old boot kid grommets? Hope that actually made sense! Rob