I have a 1996 Astra, and just like all the others its rear wiper is on a delay timer, meaning that when switched on you have to wait for multiple wipes. I find this annoying and undesirable! It occurs to me that there may just be a simple timer unit casing this effect, and if shorted out it would give a constant wipe after wipe. Is this the case, if so, where would I find this unit? Thanks in advance for any advice! Ben.