Me wipies wont park

[billyfish]

Hi all. Does anyone know ? The wiper in the image wont self park they are on or off. The wiring diagram (also attached) showed 4 wires, mine only has 3 connected, number 3 is missing . It also says they can be 2 speed. What I'm trying to do is put a intermittent switch on them, I have the switch, 1 wire in 1 out.

 

[anoccasionalyachtsman]

Did they ever self park?

Normally, with a single speed, three wire unit one is -ve, one is the switched 12v power and the third is permanent 12v. If it did self park there will be a switch in there which will either be a wiper on a circuit on the big gear (which might be dirty etc.) or a microswitch acting on a lump/dip in that gear as it passes. It stays switched on until the gear reaches the parked position.

A four wire adds a second 12 switched to a different brush on the motor. The brush opposite the -ve brush is the 'fast wipe' one and the other is the slow.

To have intermittent you'd connect to the switched 12, and if it's two speed you'd normally choose the fast one.

 

[billyfish]

No it never parked in our ownership, going to have another look tomorrow. It looks like it's wired to park. Cheers

 

[Keith-i]

Check it’s getting a permanent 12v feed first on one of those wires. Could be it’s not wired up correctly to the fuse board or a fuse is blown.

 

[Supertramp]

I installed one of these last year. It was a Vetus unit replacing a 30 year old Vetus with diffent wiring and one speed. To make sense of the wiring I fitted an extra switch (Vetus) as my original had only a simple on or off position. I now have two speeds and off all wired in as per the Vetus diagram. I recall it wouldn't park unless all the motor wires were connected. I didn't understand why but it worked. Once it started parking consistently you can mechanically adjust the position as per instructions. Watch the wiper blade is not damaging itself or boat if it sweeps too far while you adjust.

Putting a water repellent treatment on the windows seemed almost as effective as a wiper!​

 

[Supertramp]

Check it’s getting a permanent 12v feed first on one of those wires. Could be it’s not wired up correctly to the fuse board or a fuse is blown.

I think you are right - the switch needed to have a power supply even when off. My original switch simply cut the electric to the motor. I now have two switches - the original one and my new 2 speed one which has power until I turn the original off. If that makes sense...

 

[billyfish]

Yep found it . Needs a permanent feed . Thanks guys