I am replacing the single toggle switch marked “Wiper/Mist” on my 1989 Cruisers Esprit, because the old one never worked when I bought it.
When attempting to configure the boat wiring, I got each wiper to turn on interdependently of each other so I coupled them together but sometimes when I switch it off they continue to run and I’m not sure of how the Mist selection is supposed to work.
By any chance you have a basic diagram of how to wire this to a toggle swich correctly? I am wiring challenged.
The key to wiring dual wiper motors is to have the switched power for each wiper switched independently.
If all of the wiper motor power wires are connected together, they will never shut off. Use a dual pole switch that will allow you to independently turn both wipers on and off. Most mist systems work off of a momentary switch. If you buy a dual pole switch that has a center off position, ON in the up position for wiping, and momentary down for mist, you will be all set.
I would also recommend individual circuit protection for wiper motors. If you tie several together, you will need to increase the circuit protection to prevent nuisance tripping but this will cause overheating if a motor gets jammed.
Hope this helps,