TV socket blows fuse-why?

[Ingwe]

Does it have a metal sleeve at the outermost edges going an inch or maybe a bit more inside.
Ignore the shiney silver bits in the picture.
If it has a metal sleeve then that is the earth.

See my answer to your earlier post at #29

 

[Landy Andy]

To test this would you please tell me where exactly to place the probes? Thanks

If you put your meter onto 20v dc. Then put red probe to the bottom ring/circle thing. And then the black probe onto the side silver metal I think you will get 12v.

 

[Jev88]

Looks like a CBE standard plate/socket?

I would check wiring at back and get a branded 12v to usb adaptor as I have had three that blow the fuse in my almost new company car. Cheap Chinese crap?

 

[Ingwe]

Cheap Chinese crap?

Almost everything made in China since UK de-industrialised. But a more expensive usb adaptor from a reputable dealer such 12v Planet albeit it will also have been made in China. (Probably).