Electric washer with wipers activation, Nice additions to SirAndy's tutorial - now with PICTURES Options

[Valy]

I've been struggling with my washer for a long time. I liked the idea of electric washer but had the simple wiper switch that doesn't have the additional contact for the intermittent position and can't stand the idea to drill a hole for the button in my nice dash.
I'm also a CSOB (aren't we all?) so won't buy the $100 new wiper switch.

For those in need, here is the link to Andy's tutorial.
http://www.914world.com/specs/tech_el_washer.php

I started from there but wanted to make my wiper switch trigger it and start the wipers at the same time (IMG:style_emoticons/default/smile.gif)

How do I do it simple, "original" and cheap?
Here it comes:

First, I need to trigger the wipers when the washer pump works.
You don't need the intermittent relay to trigger the wipers when you trigger the pump. In fact, the original intermittent relay combined with the washer pump like Andy suggested may cause some unwanted electrical gremlin due to the switch wiring. So, if you're like me and only want the wipers to trigger once when you activate the pump, all you need is a regular relay! ($2 on ebay with the socket and wires)
Here is the schematics of the modified circuit that I used:
 Wipers_and_Washer_Pump.pdf ( 141k ) Number of downloads: 520


I used the Brown/Black wire that was existent in my car to trigger the relay and the washer pump.

I also modified the wiper switch and added the missing "53c" contact. It's a pretty simple modification but don't have the pictures right now to show as the switch is already on the car.
I'll add the pictures if there is enough interest in this thread.

[Bartlett 914]

There is some discussion on this thread about intermittent wiper operation AND washer function. Normally you will not be able to do both. I show a circuit that will permit both.

Intermitten wipers and washer function

[Valy]

There is some discussion on this thread about intermittent wiper operation AND washer function. Normally you will not be able to do both. I show a circuit that will permit both.

Intermitten wipers and washer function

You are right about combining the intermittent relay with the washer pump.
The problem is that the signal from the switch is NC (not connected) when in intermittent position, grounded in any other position and 12V when you trigger the washer. If you connect a washer pump to that signal you're putting a pull-down resistor on the relay input. Depending on the resistance of your pump, this may cause the intermittent wipers to not work, work all the time or just full you all day long.

Your circuit is nice but my switch modification will also work on the intermittent switch with the relay and trigger the pump (IMG:style_emoticons/default/piratenanner.gif)

You can also use the 924 wiper switch that has a dedicated pump contact. This will be ~$100 for a Chinese reproduction. I bought one that was a useless piece of junk. The seller claimed that all of them have the same defect so I asked for refund. Your particular millage may vary but, good luck on that path! One more thing about this, note that the Chinese reproduction has a wider handle axis than the original and here are some pictures:

ORIGINAL SWF:


Cheap Chinese reproduction: