Intermittent Wiper Control For JD3520

[MossRoad]

GOAL:
Build or buy and install an intermittent wiper control for a JD3520 cab.

THE FACTS:

TBN Member Dirtworksequip has a JD3520 cab with windshield wiper.

The wiper works by an electric switch.

The wiper is either on or off and stops wherever it is when the switch is turned off.

He would like to have intermittent wipers for those days when it is just misting and manually turning the wipers off and on all day gets tiresome.

Anyone got any ideas?

We could fab up a circuit with a 555 timer and relays, etc... but it would be nice to find a unit that already exists.

 

[HomeBrew2]

They used to be avail at any auto parts house (add-on splice-in unit). I'd try JC Whitney now.

 

[MrJimi]

Morning, have you tried JC Whitney: Auto Parts & Auto Accessories for Cars, Trucks, Motorcycles, Jeep and More
lots of stuff like that there
Jim

 

[herringchoker]

It sounds like the wiper does not have a park function (it stops wherever it is when the switch is turned off). Will the intermittent add-on unit work on this setup?

 

[DieselPower]

Probably not. The aftermarket intermittent wiper systems turn off the wipers when the motor get's to the end of one full wipe. It sounds like this system does not have a park function. If you could find a auto/truck wiper motor that would fit then you would have the park function and could wire up a intermittent wiper system.

 

[BTDT]

I wonder if you could install a rheostat for an adjustable speed motor as opposed to intermittent. Just slow it way down, but then that might be bad on motor.

 

[MossRoad]

What I was thinking is that we just need to develop a timer circuit that operates a relay. The timer would energize the relay on an adjustable delay with a potentiometer, say 5 to 30 seconds. The relay would stay open for a time delay of say 2 or 3 seconds.

The wiper will move for 2 or 3 seconds and stop where ever it is. Then, after the delay of 5 to 30 seconds, it will start again for 2-3 seconds, wait, start, wait, etc.... It should be able to make one or two complete passes on the glass in 2 or three seconds. The only downside would be that it will stop anywhere on the window once the 2 or 3 seconds is up.

It is no different than the operator flipping the switch off and on every 30 seconds except the operator can choose to flip the switch off when the wiper is to the side so it doesn't block his view.

The only way to prevent the wiper from stopping in the field of view is to either use limit switches or change the wiper motor to one that auto parks.

 

[MossRoad]

Something like this...

 

[olllotj]

Did you ever make any headway on this? The fast wiper is obnoxious!

 

[weedpharma]

If you have self parking wiper, there are circuits available to make your own.

Back in the olden days, making your own was the only way to get intermittant wipers for your car.

For example, look in google and find similar to:

On the Drawing Board: Variable intermittent wiper control - Part 1

Weedpharma