Wipe using Light Stalk!
Last night I did a job that I think will be handy. Rather than fit a timed wiper control that you keep fiddling with, I made the flash function on the dip/main beam stalk to carry out a wipe. It has been discussed before about making this work. I pulled the standard switch out to find a 4 wire device with flash function throwing a positive signal in the dip position. So you would need to have the light wedge switch (fully) operated and side lights on (if you did not pull the vac switch). Perhaps no bad thing having side lights on in the rain?
Looking closely I could have carefully cut the link and soldered an extra wire to create an isolated independent switch. However, looking in my spares box I found a 5 wire stalk unit with separate flash circuit. Using this I powered a relay with changeover contacts (common, NC and NO). Using just 3 wires you can break the park circuit on the dash switch (electric brake) and feed a low speed positive. When operated this flick puts the wiper motor onto its park circuit supply to complete the wipe. So now, without taking my eyes off the road I can give a swish by just a pull on the stalk under my hand.
In the past when I have fitted timed controls they have had two relays or two switches. One for breaking the dash park circuit and one for the pulse to power up. It can however be done with the single relay.
Mike