Xc70 full beam not working

[green van man]

Originally Posted by Gazdkw

Well I'm not sure now.

I replaced the lamps with some other new ones I already had. Had the car running and the full beams in for around 5 mins. No problems. Tried flickering them on and off quickly for a few minutes and no problems. All worked fine.

Pulled up at the car park this morning. Thought I'd just try it once. Instantly heard the fuse go.

That sounds like a driver failing. My experiance of led lighting, intermittent fault on driver blows fuse, change fuse and light works but fault will reoccure, change fuse and light works aging for a bit then starts to blow fuse instantaneously. I belive there is a flash over in the driver which blows the fuse, this flash over gets worse every time the fuse is renewed untill the carbon track is permanent.
I change the driver after the second fuse these days unless I'm sure it's a driver fault when it gets changed imediatly.

I belive the cost of these units is considerable so a borrowed known working unit may be a way forward.

Paul.