WW motor electrical connections

[Don B.]

I have a friend who owns a '65 coupe. He asked me how the WW motor was connected using the two different connectors. I assumed that the '65 and my '64 are the same electrically in the WW motor area, but couldn't answer his question. I'm not sure mine is connected correctly since the wiring was disconnected during a recent body-off-frame resto-mod work. Mine is connected as follows:

2 conductor connector = blu wire up (key up)
3 conductor connector = blk/blu wire rearward (key rearward)

Are these connectors correct?? Tnx in advance.

[Stuart F.]

Re: WW motor electrical connections

Hope you get an aswer soon.

Stu Fox

[Don B.]

Re: WW motor electrical connections

Stu -

Yours is the only reply to my question. Why? I have not idea. Is it that no one cares enough to answer or is it that the question is just plain stupid and not worth an answer??

You, apparently, are interested in whatever the answer may be. Got the same problem??

I would have analyzed my '64 system except that it is very inconvenient to do so at present - space is cramped, no battery and wiring not complete.

Wiring diagram indicates (or implies) that motor is NOT a PM type... that is, it probably has both field and armature windings. At least that's my analysis. There are three connections to the motor; two + voltage inputs (2-conductor connector) and a separate ground wire. The 3-conductor connector appears to connect the WW switch to (what might be) a voltage divider assembly mounted on (or within) the motor itself. This provides for at least two WW motor speeds based on the voltage applied to the motor (field? armature?) thru the blue wire in the 2-conductor connector. The brown wire in the same 2-conductor connector is +12v.

This is not nuclear physics and rather simple stuff, so I've invited my friend to bring his car over and we'll get to the bottom of this matter by ourselves. If my friend takes my up on my offer and if you're interested, I will let you know what's up.

Don

[Stuart F.]

Re: WW motor electrical connections

Don;

I expect to pull my ignition shield cover this weekend for other issues I'm checking with the distributor on my 63. In fact I intended to look at the WW motor as well as I am looking for a possible ignition switch controlled hot wire to use as a 12v source for an electric choke I want to try. I will chek back with you on this thread with what a 63 connections look like in that area on Sunday or Monday

Stu Fox

[Don B.]

Re: WW motor electrical connections

Stu -

A good +12v source for the choke would be the black/pink wire on the resistor that comes from the IGN terminal on the ignition switch. Both wires on the resistor are black/pink, so you have to select the wire that's not connected to the coil. The terminal on the resistor also makes a good place to connect since it is accessable. I think that's where my electric choke was connected originally.

Don

[John H.]

Re: WW motor electrical connections

Midyear wiper motors have the 3-terminal connector oriented with the yellow wire closest to the firewall, brown wire in the center, and light blue wire closest to the distributor.

The yellow wire (or black/yellow) supplies a ground to the motor through the wiper switch in both the OFF and LO positions.

The brown wire supplies 12V to the motor with the key in the ON or ACC position.

The light blue wire supplies a ground to the motor in both the LO and HI positions.

The wiper switch doesn't control power to the motor - it switches the grounds to the motor windings to turn the motor on and off and select speeds.

The 2-way connector for the washers works the same way - the brown wire is 12V with the key in ON or ACC position, and the dark blue wire supplies ground at the wiper switch to trigger the internal relay when you push the washer button.

The 1963 Corvette Shop Manual has a comprehensive section on the wiper motor diagnostics.

[Stuart F.]

Re: WW motor electrical connections

Thanks John for weighing in on this for Don. I hope this will help him.

Don;

I will check on that resistor connection you noted for my hot source (ignition switch controlled). I currently jumper around the resistor with a hidden wire as I use the full 12 volts to my Petronix II equipped distributor, but I like to make it look legit to the casual observer.

Stu Fox

[Don B.]

Re: WW motor electrical connections

John -

Many thanks for the info you've supplied. The WW motor is much more complex than I suspected from the wiring diagram that I have. However, you've cleared up the purpose of the two connectors and their orientation which is what I wanted to know.

Don

[Don B.]

Re: WW motor electrical connections

Stu -

My engine uses a MSD CD ignition system and no resistor, but the black/pink wire is needed as a switched +12v source anyway.

Don