I've been meaning to post about this for a while, but in late December, when it was way to cold to do a wiring project, I decided to do a wiring project.
The wiper controls on our 22 are on the main house panel down by the driver's right knee, and using the wipers during intermittent rain in the past has caused:
* navigation/anchor lights to turn on
* horn to honk
* bilge pump to turn on
* etc.
And unless it's a driving rain, I don't like to run the wipers continuously. The dashboard has an unused spot for a second 4" gauge, and I decided to use this space to mount wiper push buttons.
These are momentary push button switches (Blue Sea 8200: http://www.amazon.com/Blue-Sea-8200-Button-Switch/dp/B000MMFK38). I considered mounting them lower where there were holes from a removed cup holder, but the panel is too thick there (cored). Actually, the gauge part of the dash is one of the only places thin enough for these switches. I arranged the switch holes so that they could be removed and replaced with another gauge if necessary.
Wiring was fairly simple. The wiper bundles each have 3 wires: positive, negative, and the third one causes the wiper to activate. The wipers need power even when they aren't activated so they can park. Basically, the positive and 'activate' wires for each wiper are spliced with pigtails near the new switch location, and connected to the switch. Pushing the button causes the 'activate' wire to momentarily connect to positive, activating the wiper.
It is important to keep the bundles separate, i.e. not share positive from one bundle with both switches. Also, don't just run power to the switch from the positive bus on the house panel. Doing either of these will partially or fully defeat the fusing for the wipers.


Now whenever there's a splash or rain that's too light for constant wiping, the switches are there and easy to run by feel.
The wiper controls on our 22 are on the main house panel down by the driver's right knee, and using the wipers during intermittent rain in the past has caused:
* navigation/anchor lights to turn on
* horn to honk
* bilge pump to turn on
* etc.
And unless it's a driving rain, I don't like to run the wipers continuously. The dashboard has an unused spot for a second 4" gauge, and I decided to use this space to mount wiper push buttons.
These are momentary push button switches (Blue Sea 8200: http://www.amazon.com/Blue-Sea-8200-Button-Switch/dp/B000MMFK38). I considered mounting them lower where there were holes from a removed cup holder, but the panel is too thick there (cored). Actually, the gauge part of the dash is one of the only places thin enough for these switches. I arranged the switch holes so that they could be removed and replaced with another gauge if necessary.
Wiring was fairly simple. The wiper bundles each have 3 wires: positive, negative, and the third one causes the wiper to activate. The wipers need power even when they aren't activated so they can park. Basically, the positive and 'activate' wires for each wiper are spliced with pigtails near the new switch location, and connected to the switch. Pushing the button causes the 'activate' wire to momentarily connect to positive, activating the wiper.
It is important to keep the bundles separate, i.e. not share positive from one bundle with both switches. Also, don't just run power to the switch from the positive bus on the house panel. Doing either of these will partially or fully defeat the fusing for the wipers.


Now whenever there's a splash or rain that's too light for constant wiping, the switches are there and easy to run by feel.