Wiper problem

[tweiss3]

Originally Posted by infernosg

Isn't the relay in the wiper switch itself? I thought that's what the "wiper fix" was - replacing the relay. I've got an extra switch lying around from the silver car (S4). I honestly don't know if it completely works or if a S4 switch works in a S5 car.

Can anyone tell me if the S5 and S4 switch are interchangeable? I'd love to pick up a spare incase I screw up somehow.

Also, any idea which relay is bad by my description? That write up says there are three.