Q: how to disable rear wiper during misting (wagon)

I would like to disable the rear wiper, when i press the rear mister/sprayer, so it wont activate by the mister.

When i mist/spray water on my rear windshield my wiper will get activated and wiper turns on for a couple of swipes. I would like to disable that feature without disabling the wiper when i want to use it by itself.

Is there a relay or a wire i can disengage ???

thanks in advance

 

are you gonna relocated it to mist the intercooler instead?....j/w

 

how did you read my mind ???

Im just goin to branch off from the pump and later if i have time ill add switch to trigger it from the rear wiper

 

I was told about this when I got my car but can't remember the specs on it.