I need this help for a friend of mine who broke one of the headlamp washer heads.
He would like to disable it by removing the fuse. No owner's manual
Thanks in advance.

Thanks spider, this was the method I used in mine many years ago. I've saved lots of wash water since thenspider wrote:... I was going to say why not disconnect the pump / motor for them but I guess that's going to be fiddly to get at.