Originally Posted by
GVK.
Weird one , I have replaced the bulb holder in them, can't think of anything else, really.
Other than the loom splits behind the trim on the Focus, might have a bad connection, from memory its on the passenger side.
I followed it along the bumper to a large plug that’s all ok. Then up into the car. All looks fine. I plugged my test bulb holder in but wouldn’t work. I may try a switch