Relay identification

Hello, anyone with knowledge of Mk 2f relays.

Need the part number of the front wash wipe relay ( I think)

Problem is no speed control, i.e. when on it is at fast speed only. Wash works OK

So thinking about this while I am typing, it may not be a relay problem after all, could it be a switch problem?

I though I had a relay for this, but on looking at the 6 that are on the 2f, none of them had the same identifier (part number) as the one in my hand, plus the one's on board were all the same height, about an inch, whereas the one I had in my grubby mitt was twice the size!!!

Any thoughts on this.

Cheers

Jon