Fitted these last year and put a 12v load resistor on them and have worked upto today when the glowplug warning light came on,got home and instantly checked brake lights ,,,,,not working.......starts her up though and the glowplug light doesnt flash anymore but brake lights still not working,side lights work fine though.....any clues......do i just replace the resistor,,,,and who sells them at short notice as got my original of the web