Month/year build: 06 LS Focus Zetec Hatchback (Manual)
KM at fault: 101,000
Fault: Blinker not working
Cause: Rear Blinker Bulb Holder, Part # FO- 4M5A 13K370 ($28.55 Clancy Ford, Bathurst)
Here is a pic of the part at fault (click on image for larger version)
After replacing bulb even though the element was not broken the fault remained. So I swapped the bulb holders from the other side to make sure there wasnt a fault in the wiring. The other holder worked fine on both sides. I then cleaned the electrical connectors on the faulty holder. Problem remained.
So I bought another holder & the problem is gone.
Its one that you usually wouldnt think of but easily fixed within 10 min & a phillips head screwdriver.