Rectifier Fuse. (LD 150 1957)

I was fitting my brake like and it worked very well when I was testing it and suddenly stopped working.. I did not hear any 'pop' or anything but I thought the fuse might have blown.. so I took it out and tested it with Ohms and it just does not show anything on the multimeter.. just dead.. so definitely thats the issue there.
I am just wondering whats the right specs for the fuse that fits in the rectifier? the fuse I have got in is so old that I cannot even see the numbers printed..
is it a 3A?
does it have to be a specific type of fuse too?
Thank you!
I am just wondering whats the right specs for the fuse that fits in the rectifier? the fuse I have got in is so old that I cannot even see the numbers printed..
is it a 3A?
does it have to be a specific type of fuse too?
Thank you!