Multifunctional switch washer functions swap

[deathfry]

Is it possible to make front washer work by pressing side button and rear by moving the "wheel" on the switch?

 

[Bigburb3500]

Is it possible to make front washer work by pressing side button and rear by moving the "wheel" on the switch?

You want to swap functionality of the switches?
If I understood that correctly, you probably could just change the tubes feeding the sprayers. That way when you engage the rotating switch it pumps the read sprayer and the buttons sprays the front. Only issue is you will lose the auto wipe function.

 

[deathfry]

You want to swap functionality of the switches?
If I understood that correctly, you probably could just change the tubes feeding the sprayers. That way when you engage the rotating switch it pumps the read sprayer and the buttons sprays the front. Only issue is you will lose the auto wipe function.

And the rear wiper will work while spraying the front window?

 

[Bigburb3500]

Yes. Thats probably the “easiest” way to flip the utility of the switches. The next step if you want it to operate 100% correctly will likely be to hunt down a wiring diagram and require the stock to engage as you want. Seems like a lot of work tho

 

[deathfry]

Yes. Thats probably the “easiest” way to flip the utility of the switches. The next step if you want it to operate 100% correctly will likely be to hunt down a wiring diagram and require the stock to engage as you want. Seems like a lot of work tho

Exactly! So I wonder if anyone tried to do something similar

 

[mikez71]

So no more variable speed windshield wipers? Or are you willing to add a separate speed switch?

 

[deathfry]

So no more variable speed windshield wipers? Or are you willing to add a separate speed switch?

Well as a perfect solution speed should remain untouched, but change sprayer function button and wheel. It would be nicer to press side button to wash front window instead of pressing switch, wouldn't it?

 

[mikez71]

Ok I thought you meant you wanted the wheel to control the rear wiper.

The rear washer button connects +voltage to the rear washer relay and rear wiper unit.


And the front washer button connects ground to the BCM input, which then grounds the front washer relay.



So you would need two additional relays.

1. when powered by the rear washer button (L-GREEN), would connect ground to the factory front washer relay (ORANGE). Also ground the BCM wiper input (L-BLUE) with 33ohm resistor for factory mist (low speed).

2. when grounded by the BCM ouput (ORANGE), would power the factory rear washer relay (L-GREEN) Also power the rear wiper unit (GRAY).

BUT as Deathfry stated, your rear wipers would still activate when spraying the front washers. And your front wipers will activate when washing the rear..

Unless you add two more relays to disconnect the factory wiper signals when washers are activated.. If the relays are too slow compared to the BCM or wiper unit logic, you might still get a single wipe on the wrong end...