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Sat Jun 11, 2016 4:51 pm

Finally installed the wiring and it works fine plus just in time for rain in Seattle

Thu Nov 10, 2016 8:14 am

just crawled under the dash and remove the control as per above photo and found it full of water- i wonder if that could be effecting it's performance

Thu Nov 10, 2016 9:53 am

That might have something to do with it. :lol: I know my flasher relay stopped working when it was full of water, so I drilled a drainage hole in the replacement to keep it from happening again until I could address the windshield seal leak the following summer...

Thu Nov 10, 2016 8:09 pm

Stuart helped me wire it up and it worked for 3 days. Now its nadda....

Tue Nov 15, 2016 1:56 pm

I gotta get to mine... Stuart sent me a ton of photos - presumably from your bus Bleyseng? LOL
I just haven't tackled it yet... I don't know if my switch has the contact for the intermittent it has been so long. Anyone of a photo of what they did to the switch to make it work? Or a factory switch with the contacts?

Mon Apr 20, 2020 12:48 pm

Synapse wrote:
So I decided to see what would happen if I modded the switch. It took me 3 hours from start to finish and I grade it as a 7/10 in difficulty only because there are some seriously small screws that if you loose your toast.

Thanks for this Synapse! As the champaign edition switch is no longer available, I think I am going to try to add intermittent wipers using your method.

Sat Apr 25, 2020 7:01 pm

Alright. Can someone please help me figure out WHAT THE HELL is going on with my damn intermittant wipers?

They did work at some point in my ownership of this Bus. I don't remember when they stopped working; I do know I've tried multiple relays. (There are currently 4 sitting here in my Bus with me as I type this--3 old style ones, and one that has more of a modern circuit board inside.)

I have never changed the wiring except for adding an electric pump. As I recall, the intermittant wasn't functioning when I got the pump working, but that may be mistaken. Apparently, somehow I made the pump work by connecting the pump's ground to ground, and punp's positive side to the brown wire that goes between the switch and the relay. (The one that goes to S.) I used one of those side by side wire taps.

Up until the other day, high, low speeds worked. Also the pump sprayed and the wipers would swipe 2-3 times.

My interest was piqued the other day by a text, so I decided I would see if perhaps the issue was as simple as a unplugged ground or something. It was in doing so that I (re)discovered the pump wiring.

So I simply unplugged the pump. At that point, the wipers just started going.

Now, they go and don't stop unless I pull the relay out, no matter what position the switch is in.

I'm wondering if somehow I've just fried all 4 relays, possibly with that pump connection.

I did pull the fuse box and started tracing connections to make sure all were OK. I found that the ground wire for the relay (the wire that goes from 31 all the way up to the motor and shares it's ground connection) was not grounding. I replaced the wire and it now grounds.

However, all the behaviors are the same.

I do have a couple watercooled wiper relays sitting around, so I'm thinking of altering the wiring to use one of those, though I'd sort of like to see the system work as intended before I go changing things, in case that doesn't work either.

That was the only change

Sun Apr 26, 2020 3:57 am

Can you stick the wiring diagram up here Dave?

Sun Apr 26, 2020 6:30 am

This is the one I've been working with, from earlier in this thread:

I also mapped out the wires on my own plugs to help myself visualize what is going on. It was the brown S wire that goes from the switch to the relay that I'd tapped into to power my pump. (Now removed.)

And for my own future reference (so I don't have to go back and forth to 17 tabs) here are the diagrams for changing things to use the watercooled relays:

(Hint: I just realized that photos can be saved from Photobucket and then uploaded to The Samba. This was posted earlier in this thread but that the Photobucket watermark; I've uploaded to The Samba.)

Sun Apr 26, 2020 6:13 pm

Alrighty-I'm getting closer.

I am just sure that the wiring was all correct, which made me decide that the relays I had may have all been bad.

So I decided to just swap over to the wiring mod to utilize the newer water cooled "19" relay style. Because I had 3 in a box on my shelf.

Now, I have intermittant wipers!

But, also now, when I pull the lever toward me (as if to wash the windows) the wipers don't move 2-3 swipes as before. Instead, it is as if they are moving via the intermittant circuit.

Meaning, I have to hold the lever toward me, and if I keep holding it, they'll go once per 10 seconds.

Dammit!

Anyone who's set up their wipers with the watercooled relay-is that simply how that works?

Or will things work properly when I run the wire for the electric pump? (It appears that people are adding a connection/wire for the pump to their switches. It further appears that closing the conneciton in the switch provides 12v to the wire that goes down from the switch and Ts off to the terminal at the relay and also pump.

Sun Apr 26, 2020 6:17 pm

Is this new relay a programable one?

Sun Apr 26, 2020 6:44 pm

Ha, nope! I had 5 different watercooled relays, but they are all 19 relays. So they're the older style that isn't programmable.

I have so many because I figured out this mod back when I was driving Rabbits and old Cabriolets and made the swap on several.

Sun Apr 26, 2020 7:07 pm

Ok... I started to do some digging with trying to wire up the pump circuit to see if things start working more correctly.

On the Aussieveedubbers site (also linked earlier in this thread) we see the below pic:

https://forums.aussieveedubbers.com/viewtopic.php?tid=86544

It appears that the wire for the pump connection is just soldered onto a rivet on the switch.

When I find the same rivet on my switch, it appears to be connected to the brown wire. I think my switch and the Aussieveedubbers pic switch likely have the same contacts. I'm wondering, then, if I should connect this wire to the brown wire.

Sun Apr 26, 2020 8:16 pm

A little more messing with it.

When I temporarily connected the wire to that spot on the switch, sure enough, the pump works and I get the 2-3 swipes by pulling up on the lever.

But then the intermittant function doesn't work! (This is like how things worked before I changed to the newer relay.) For years, I had pump function and 2-3 swipes but no intermittant.

So if I pop that wire back off, the intermittant function works. If I just connect that wire to 12v, then the pump goes and I get 2-3 swipes.

I guess I need to figure out how to make this happen with the lever.

Thu Apr 30, 2020 8:15 am

What I can't work out in my brain is why I seem to be either stuck with only intermittant function or pump function, but not both.

Intermittant function works with the lever in intermittant position OR pulled back for pump position (you do have to hold the lever long enough for the delay to work) when the wire to the pump is not connected.

But then if I connect the wire to the pump, I get pump and 2-3 swipe action when I pull the lever but then intermittant doesn't work at all. It'll begin working correctly as soon as I disconnect the wire to the pump.

This is most perplexing because if you look at the contacts in the switch, it appears that the brown wire that seems to operate the pump only has one connection within the switch-and that is when you pull the lever.

I've wondered if there is a possibility of something broken internally in the switch and making wonky contact, but I cannot see anything when looking.

Can anyone help me understand what is going on?

I guess I could just install some other microswitch to control the pump, but that seems to be redundant.

I do see that with the altered wiring diagram/plans, the brown wire is moved to the cube relay. Again, I am not sure what this is accomplishing, because it sure looks like the only time this wire is connected to anything within the switch is when you pull the lever for pump.

For testing purposes, I shoved stripped ends of wires into the plug.

Thu Apr 30, 2020 8:51 am

Dave - did you ask Telford? PM him. He had to figure out all this for my 74 that had no intermittent. I had the switch and a relay. He figured it out.

It gets to be confusing as hell if your brain can't wrap around it. I followed the wiring diagram to get my headlight pumps working, but I had to wrap my head around it first.

Thu Apr 30, 2020 10:13 am

When we put the relay into the 74, I asked the same thing - cant I piggyback the contact on the column to run a pump. As mine sits in the 74, I have intermittent, but Telford said I can't have both off that switch. So I have pneumatic water squirters og style.

Thu Apr 30, 2020 10:30 am

From the factory, in either the aircooled or watercooled cars, you should be able to pull the lever forward and have the wipers run 2-3 swipes. Regardless of whether you have a pump or a pneumatic squirter. I thought about just getting the stuff to go back to pneumatic, but then it wouldn't run the 2-3 swipes.

I'm 100% sure that this function worked before I started futzing with all this.

Because I've tried just powering the wire to the pump, I know I could add a microswitch in there and make both functions work. But that seems like a kludge when there should be a way to wire it up to work with what's in there.

I'll shoot him a PM, perhaps he isn't following this thread anymore.

But yeah, that switch does do some crazy electrical wizzardry to make things work. Seems like contacts switch from power to ground and back again. Crazy.

Thu Apr 30, 2020 10:56 am

Maybe my 74 cant use the pump because it opens the squirter valve and not a contact point. :-k #-o

Thu Apr 30, 2020 11:27 am

I looked through this thread again and found this pic:

So I decided, owing to the wierdness of how the switch works, that I'd go ahead and see if adding the red wire would work.

Nope.

In either side of that switch, I either get the pump/2-3 swipes working correctly, or it just runs.

Something is wonky for sure.