Thanks for the info very helpful
Had a look at the circuit diagram.
Looks like the relay module N14 is used for normal and washing (when you pull the stick forward) (pins C-2, 4 and 1 on B68), this in turn energises the relay coil and pulls the contact closed, which in turn sends a signal to the wiper motor and controller via pin 4 on N14 to pin A-4 on P27. The other relay coil energises when pin B-2 on B68 (to pin 2 on N14) is live and if you look at the diodes in N14 both relays will energise in that case, I assume this is for a fast setting. This results in more or less the same thing except the signal travels from pin 5 on N14 to A-5 on P27 and in turn the wiper motor on a different terminal.
If your relay module was corroded and the contacts were closed this would explain why your wipers were coming on when there were not supposed to.
I doubt this is cause of intermittent wiper issue but I would have to check the circuit with meter to tell for sure.
From wht I gather from others it is more likely to be dirty contacts in the wiper motor unit itself, for which further investigation is required.
To err is human, but you need an Alfa to really screw things up!
The road to heaven is paved with old Alfa's.
Last edited by SpiderMJ; 19-03-10 at 19:07.