One of the things that I really, REALLY hate is wipers that chatter. Usually this occurs because their isn’t enough water on the glass. The wipers in my boat are either on or off. There is no intermittent. The switches are a three position switch, momentary, OFF and ON. I’d love to be able to add a variable timer.
I have three switches, one for each wiper. If I pull them out I’d have a big hole in my helm panel. I’d love a timer that I could add that would provide the ability to provide a timer to the ON position of all three switches. I’m just not smart enough to figure out how.
I have same 3 switches and 3 wiper motors.
The timer control is just turning a small relay on the board on and off.
It has a 'limit' of 7 amps. I think each motor uses 2 amps. 2 times 3 is 6 amps, so relay should handle it, I think. If not, then use timer control to power another higher amp relay to run the 3 motors.
Several ways to wire this up.
1. run the timer output to the on - output side of all 3 manual wiper switches. The timer controls the frequency. The 3 manual wiper switches just turn them on as before regardless of the timer setting.
2. run the timer output to the power source input side of all 3 switches and disconnect the original power wires, that way you can individually control the motors with the switches and it also is timed. Do you really need all 3 wipers to run when it is raining?
3. something else
One reason for number 1, what if the timer board breaks, you still want to be able to run the wiper. Just have to think about what you want to do and the possible consequences of wiring one way or another way.
Another reason for number 1, you want the wipers continuously to run. I forget if the timer will do that or not, it may still insert a tiny delay at its minimum setting.
I don't see how a continuously running wiper can stay synchronized with the other motors with no pausing reset to stop at its home position. I think only the timer control set to pulse can allow for a synchronization of multiple motors. Car wiper blades are synchronized because they are geared together with only one motor.
