View Full Version : Interval wipers - '63

01-23-2008, 07:37 PM
Guys, I bought the JC Whitney interval wiper system and re-wired the switch to be out of the box, and in the dash.
Was hoping someone here might have blazed the trail and done this for a 63 (or 64?) with the rocker switch. On my Stude switch:

A - blue & purple (purple goes to the breaker)
B - black
C - red
D - yellow

My manual shows the four all going to the motor, but no specifics on what they do individually.
The Whitney circuit board has 5 wires; black to ground, red to 12+, the blue to park, a green & white which, near as I can tell are high and low speed. Has anyone gone where no dillweed's gone before?

Western Washington, USA

01-23-2008, 08:08 PM
I would bet that blue is park, beyond that, you'll have to probe the connectors and see what happens in various positions.

Here's a nice wiring diagram if you have a color printer:


unfortunately the wires are only designated by color not by purpose. I thought that I had a key for the 3-wire ones but I don't think I ever wrote down the pinout for the 4-wire ones.


55 Commander Starlight

01-23-2008, 09:40 PM
I put the Whitney switch in a '63 which I no longer own. I remember there was a wire I did not use at all. I did as Nate suggested. Probe and find.

Brad Johnson
Pine Grove Mills, Pa.
http://s57.photobucket.com/albums/g233/rockne10/Rockne/th_Rocknegauges.jpg'33 Rockne 10, '51 Commander Starlight, '53 Commander Starlight

01-24-2008, 07:47 AM
Thanks guys!

Western Washington, USA

01-24-2008, 05:27 PM
Tom, I've got what you are looking for. It was in an older post I'd made, but the images were no longer visible because my links had changed. Here it is:

I did a web search for "wiper motor wiring" and came up with a well done set of diagrams and explanations for the 12v 4-wire motor in a Triumph TR6! As it turns out, the diagram looked essentially like the guts of the '63 Lark wiper motor, so I printed it and studied it carefully. See this extremely helpful set of diagrams here:http://www.vtr.org/maintain/wiper-problem.shtml Yep, that would work, I was convinced, so I looked for a switch that had the same combinations of continuity as in the Triumph diagrams. No luck finding such a switch anywhere.

The next thing to do, which I should have done a long time ago, was to order a NOS wiper switch for a '63 Lark. When it arrived today, I looked for the same continuity combinations as the Triumph diagram, and found them!

To record this for posterity, I borrowed the look of the Triumph diagram, and modified it for this 1963 Lark motor and switch, as seen below:

Click image for a larger, printable view
http://simps.us/studebaker/misc/images/1963LarkWiperMotorAndSwitch-diagram-small.gif (http://simps.us/studebaker/misc/1963LarkWiperMotorAndSwitch-diagram.asp)

Paul Simpson

1955 1/2 Ton Pickup
[i]The Red-Headed Amazon
Deep in the heart of Texas

01-24-2008, 08:04 PM
Fantastic, Paul! That is very helpful, thank you.
I'm not the sharpest knife in the drawer 'cause it looks to me like the yellow wire drives the high speed, in the Triumph diagram..? The black wire appears to be park, right?

Western Washington, USA

01-25-2008, 12:43 AM
Tom, the black wire in Paul's diagram is switched power from the park cam/switch to the "slow" winding on the motor. What the diagram does not show is the connections within the switch at different settings, commonly known as a "truth table". IIRC, the switch would, in the "off" position connect B&D, and leave the others unconnected. In "slow", it would connect A&D, and leave the others unconnected. In "fast" it should connect A&C, and leave the others unconnected.

Or, just to make matters truly confusing, maybe not. You see, there are several approaches to making a 2-speed motor. The two windings could be used selectively (one is fast, the other slow), or they could add positively (slow is one winding, switch in the second as well for fast), or they could add negatively (fast is one winding, switch in the other for slow). It all depends upon how the motor is constructed.

But for interval wipers, I think all you want to do is to give a short kick of power to whichever of the red or yellow wires causes the motor to run fastest when powered up on its own. I'm 99% certain you'd use the yellow wire, since it seems to be the one that gets power through the park switch when it is in the parking cycle.

You could get a clip lead, connect it to +12 volts, and simply try applying it to either the red or yellow wire at the 4-conductor plug next to the motor, and see which gives you the fastest sweep. Then use that wire to connect to your interval wiper switch.

I have one of those interval wiper kits, but have never installed it. It hardly ever rains in Alberta, you know.

Gord Richmond, within Weasel range of the Alberta Badlands

01-25-2008, 10:15 AM
Thanks much Gord. If I can't figure this baby out with all this help, it'll be time to park the creeper.
My dash is on the workbench and the instructions all presume the car is in one piece and hooked up to a battery. How presumptious! I suppose I can add voltage to the heavy gauge alternator wire. My workbench looks like a Rube Goldberg contraption!

Western Washington, USA