JustinO

Hi all, I have a 2012 Roomster 1.2 Petrol. Recently I noticed the third brake light was not working, however all other tail lights were. I looked at replacements which were hard to find but my local dealer quoted £24 (I have the clear LED version). To be sure I tested the wiring at the connector and it gave back 4 volts when the brake pedal was pressed. Ended up ordering a brand new boxed replacement from ebay which came with trim. Fitted this morning however the replacement does not work. I'm wondering if I've been unlucky and been sent a duff, or if there's some other problem. Does 4 volts for an LED light sound right? Looked at other posts and tested the rear wiper/ washer which is all OK. Any thoughts would be very much appreciated. :-)