Hello, I hope the following assists you.
According to the Ranger manual the wiper relay is integral to the wash wiper switch and not separate.
Below is a wiring diagram that should assist you in tracing the fault.
Let me know if I can advise further and I'll reply as soon as I'm able to.
Hi Sean. Looking at the diagram I would tend to agree and would explain why none of the relays I found had cabling with similar colours. Thanks for your assistance.