hi, ive got a bmw 525, 1989, right hand drive, and i need to locate and then fix or replace the windscreen wiper control relay, can anyone help cos my local bmw dealer didnt want to help me and my manual is not telling me enough information.

the original fault is: my windscreen wiper wash/wipe stays on untill i turn off the ignition, the wipers work ok, its just when i try to use the wash/wipe the wipers keep going and the water keeps flowing

any help would be appreciated
thanks in advance
dean

email address: deano.zoff1@virgin.net