[T3] 6V to 12V Wiper Conversion...

[Jim Adney]

John,

I'm not sure I can answer your question very well, but the first 
thing that comes to mind is that I THINK VW introduced 2 speed wipers 
in '68. If that's true, then the reason you have one too many wires 
to deal with is that your switch doesn't have the output pin for the 
2nd speed.

If this is the case, you have a couple of choices:

You could just insulate the low speed wire and tuck it away 
somewhere, so you'd only have high speed.

Or, you could route the power lead from the switch to a SPDT toggle 
which you could hide under the dash. This would let you turn the 
wipers on/off with the OE '66 switch and change speeds with the 
hidden switch.

Let me know if this helps at all. If so, I can look at the terminal 
numbers more closely. In general, those don't mean anything to me, so 
I have to study the wiring diagrams to make sense of them.

Jim

On 9 Aug 2011 at 0:13, John Jaranson wrote:

> I have been meaning to swap a 1970 wiper system into Sophy (1966 Square) for some time.  This will give me a 12V motor and the vastly improved wiper arm attachment method.
> 
> Well, I got the original system out and the 1970 system cleaned up.  That is when I noticed that the 12V 1970 system has 4 wires and the 1966 6V system has only 3.  Dug out wiring diagrams for each and see the differences but still not exactly sure how to use the 1970 12V motor with the 1966 switch.  I created a comparison image here....
> 
> http://www.carartbyjohn.com/2011Misc/WiperWiring.jpg
> 
> Do I just connect the 53, 53a, 53b circuits up properly and ignore the 30, 31, and 31b circuits?  Not sure since it looks like the power to the switch from the fuse panel comes in on the 30 circuit.


-- 
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Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA
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