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

[Keith Park]

My 65 has 2 speed wipers and a 69 wiper motor after the conversion, but I
did that 15 years ago and have forgotten the details.  I don't remember a 6V
variable speed switch but I may have forgotten it.

Keith


Top Notch Restorations
topnotch at nycap.rr.com 
http://www.a383ina68.addr.com/radiorest/main.htm
71 Squareback "Hothe"
65 Notchback "El Baja Rojo"
65 Squareback "Eggcrate"
87 golf "Winterat"
93 RX7 "Redstur"


-----Original Message-----
From: type3-vwtype3.org-bounces at lists.vwtype3.org
[mailto:type3-vwtype3.org-bounces at lists.vwtype3.org] On Behalf Of Jim Adney
Sent: Tuesday, August 09, 2011 10:49 PM
To: type3 at vwtype3.org
Subject: Re: [T3] 6V to 12V Wiper Conversion...

On 9 Aug 2011 at 12:27, John Jaranson wrote:

> > http://www.carartbyjohn.com/2011Misc/WiperWiring.jpg

> I figured it out!
> 
> I pulled the 1966 Switch from the dash and did a little bench testing.
>  I simply hooked the 53, 53a, and 53b circuits together correctly
> between the switch and the 1970 motor. (wire colors are different)  I
> ignored the 30 and 31b circuits/wires.  I applied 12V to 53 just as in
> the 1966 wiring diagram and used the ground from the wiper
> transmission.  Pulled the switch on and everything worked, including
> the variable speed rheostat in the 1966 switch. 
> 
> Now I just need to go install it all back in Sophy.

It's great that you've got it working, John. So Sophy controlled the 
speed with a variable resistor. That won't give you as much speed 
variation at 12 V as it did at 6, because there's less current at 12 
V.

I'm pretty sure you don't want to connect both the high speed and low 
speed wires at the same time. It may work, but I'm concerned that it 
might draw a LOT of current and be hard on the motor. I THINK the 
high and low speed wires on the '70 motor are 53 and 53b. You can try 
them one at a time to see which is which, but I'm guessing that 53b 
is the high speed.

If you can live with high speed and the rheostat, then just insulate 
the other wire and tuck it out of the way. (It will be "hot" when the 
wipers are running.) Otherwise, you could still add the extra SPDT 
switch and have both high and low, each with resistor speed 
reduction.

When you're done, make sure the wipers park themselves (power to 53a) 
when you turn them off and stop instantly when you turn the key off.

It's also possible that your 66 was expecting a two speed motor and 
you've got it wired right for that.


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

_______________________________________________
VWType3.Org mailing list - type3 at vwtype3.org
http://lists.vwtype3.org/listinfo.cgi/type3-vwtype3.org
Contact gregm at vwtype3.org if you need help with the list.