Not using a "special" wiper switch and want to use a push to break relay to disable the park switch connection to the low speed terminal when wipers are switched on.

This will obviously mean that I either need to use 2 relays, find a push to break relay that has 2 trigger terminals or connect both fast and slow feeds to the terminals with a diode to prevent back-feeding the other speed.

a) Can anyone see a problem with this?

b) Any recommendations on a suitable rectifier diode that's easily available from Maplin (got a Maplin round the corner but no RS Trade Counter)?

c) anyone got a better solution? Only available connections from the car loom are: fast +12v, slow +12v, ignition +12v, earth.

Thx

Stephen

[Edited on 25/3/07 by stevebubs]

Is this suitable?

http://www.maplin.co.uk/Module.aspx?ModuleNo=46413 &criteria=rectifier%20diode&doy=25m3

Or this..

http://www.maplin.co.uk/module.aspx?ModuleNo=46431&doy=25m3#overview

?