[Gedc]

Thanks for the feedback. As an update. The dealership couldn't find anything wrong. Swore blind it wouldn't be the LED units - to quote - "they never fail". Kept it overnight then they found the issue - which they still haven't fully explained to my wife. $3500 replacement unit required. I have the ford 5 year warranty as well - doesn't cover it as they class it as lights. Seems to have everyone from the service desk through to business managers involved at this time. Awaiting them to confirm with ford NZ if they will replace the unit at their cost. We have the CGA in NZ - consumer guarantees act - which affords me some protection re fit for purpose / acceptable lifespan.

Need to lodge a dispute if not mutually resolved but I reckon a maintenance free, sealed LED unit should last longer than 4 years before failing.

Thanks again. I'll post the technical fix for the benefit of the forum when I get it back in writing.