Anyone use one of these intermittent wiper module boards?

[themechanic]

https://store.qkits.com/wind-shield-wiper-timer-module-mxa041.html

This "Wiper" Timer Module, although designed for vehicle use, it can also be used in applications requiring repeated power cycles. Such as irrigation, dross and residue sweepers and lighting displays.

• Time Interval : Adjustable from 3 to 30 seconds
• Power supply : 12 VDC / max 40 mA
• Installs between the wind shield wiper switch and wiper motor. Can be used in any car.

• Gives your car the "intermittent" wipe mode, instead of either having the wipers on or off.
• Installs across the low speed circuit of the wiper motor.
• Use the normally open contacts to supply the slow speed circuit.
• The timer will turn on for a few seconds then turn off.
• When the potentiometer is completely rotated to the left (counterclockwise) the off time will be minimal
• When the potentiometer is completely rotated to the right (clockwise) the off time is at it's maximum (about 45 sec).
• The potentiometer has an incorporated ON/OFF switch. Rotate to the left, it will click, turning the unit off. Ensuring the timer does not start another wipe cycle.
• The park contact should supply the wiper motor until the wiper makes a complete cycle.
• If not then this unit will probably not work for you.
• It is easy to determine, just shut the wipers off while they are in the middle of the cycle.
• If it returns to park position then you are all set.
  
  ON OFF switch is incorprated into the speed adjust pot, fully CCW turns it off.
  
  
  LED indicator for the state of the relay.
  
  
  
  
• PCB dimensions: 58 x 50 x 22mm OR 2 1/4" x 2" x 1" (L x W x H)
• The PCB has four mounting holes one in each corner of the PCB.
• Check for an enclosure here: Enclosures
• The pot has an ON/OFF switch incorporated and it would be possible to add a short length of wire (100 cm or aprox 36 inchs 5 wires in total) to remotely mount the control.

Chose a knob for the potentiometer here in our Hardware section <-- We include a small plastic knob with the MXA041


Keep in mind that there are far to many wiring configurations for us to be able help with all installs.
Knowledge of automotive wiring is required for successful installation.
Basically this is just like a switch that goes across the low speed switch.





The easiest way to make the unit work is, locate which wire is the slow speed wipe.



Connect a lead / jumper to GND (changed from positive after the feedback below) the other end will be used to probe the wiper motor wires.



Which ever one starts the slow wipe cycle is the one you are after. These leads should be present at the wiper switch.



Now connect the COM pin of the relay to GND ( changed from Positive ), the NO pin goes to the wire you have just discovered.



The wipe cycle should complete a full revolution when you remove the trigger wire.



These instructions have been updated (May 2019). Any feedback will help others.



If you cannot find the low speed wipe using GND try a positive trigger voltage.



All of this assumes the motor has a common ground, anyone know of a system that uses Positive as a common? Please let us know..

 

[JimCoronette]

Does it have the push button action for the washer pump?

 

[kiwigtx]

Does it have the push button action for the washer pump?

I don't know, but you could use a double pole relay, off that relay output to achieve that.

 

[70chall440]

It would appear that the module just regulates the speed/timing since it is wired across the low speed side of the wiper. This would mean that you would keep your original switch and thus keep the push in window squirter.

 

[JimCoronette]

It would appear that the module just regulates the speed/timing since it is wired across the low speed side of the wiper. This would mean that you would keep your original switch and thus keep the push in window squirter.

That's what I was thinking, just wire this unit between the switch and the connector.
I've been looking for a retrofit like this for years.
Thanks!

I built a similar circuit as my final project in my integrated circuit class in 1982. I love the 555 timer!

 

[Rockland71GTX]

I think there might be issues if you are using this on a car with 'hidden' wipers. At the end of each cycle they will go to the park position versus sitting on the windshield waiting for the next cycle.

 

[70chall440]

Might be worth mocking up and testing.