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"69 wiper motor - Willcox ? "

Old 08-02-2010, 04:17 PM
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Default "69 wiper motor - Willcox ? "

Ernie if I may ask a question.
I just removed mine and when I bench test it there is smoke comming from what looks like some sort of old fashioned wire wound resistor behind the solenoid for the park mechanism. the one side is connected to the terminal that also has one of the motor wires and the other just has a bare wire hanging not being connected at all, should this just be touching the casing for some sort of ground?
It seems like its an old fashioned pull up/down resistor. Do you know why it would get that hot it would start smoking? Thanks for any light you might be able to shed on this.
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Old 08-02-2010, 08:59 PM
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Ernie.............where the heck is Ernie when you need him ?
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Old 08-03-2010, 11:13 AM
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Sorry, this is not Ernie, but will nevertheless try to help (Ernie, please correct me where I am wrong!).

The mentioned resistor controls the wiper motor's lower speed so it has to eat up all the "unnecessary" watts - that's why it gets so hot.
I replaced my broken one with a modern type (22R, 5W, see pics, fits perfectly), one end goes to the terminal connector (black wire) the other to the case (ground).



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Old 08-03-2010, 12:14 PM
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The mentioned resistor controls the wiper motor's lower speed so it has to eat up all the "unnecessary" watts - that's why it gets so hot.
I replaced my broken one with a modern type (22R, 5W, see pics, fits perfectly), one end goes to the terminal connector (black wire) the other to the case (ground).

Thanks GunPowder
What would happen if you just get rid of this resistor? The reason I ask is mine broke and I did'nt replace it but it seems like everything works, high & low speed. Where did you get a resistor that size?
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Old 08-03-2010, 04:13 PM
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Originally Posted by 69/03vette View Post
Thanks GunPowder
What would happen if you just get rid of this resistor? The reason I ask is mine broke and I did'nt replace it but it seems like everything works, high & low speed. Where did you get a resistor that size?
The wiper motor will not run at low speed. I guess it will run in either switch position at hi speed.

I ordered that resistor from an electronic parts discounter here in Germany. Not sure where to get it in the U.S. eBay might be worth a try....

I just double checked it: I have a spare one here. If you can't get a right sized resistor I can put it in an envelope and send it over to you.
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Old 08-06-2010, 11:05 AM
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Let me look this over, I've been working on a new project...

E
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Old 08-06-2010, 01:13 PM
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Looks good to me GunPowder!

You can probably find this resistor at your local radio shack. 5w 22ohm.

oh, I made a new picture of this resistor and I'm sorry I don't see the originals.



Oh.. Since there are so many questions about this resistor, I put the picture up on the help and repair side of the site too... Roger you'll be able to find it at this link.. http://willcoxcorvette.com/repairand...lp.php?hID=30118243


Last edited by Willcox Corvette; 08-14-2010 at 10:18 AM.
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Old 08-07-2010, 12:46 PM
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Originally Posted by Willcox Corvette View Post
Let me look this over, I've been working on a new project...

E
You know one thing that bothers me about this is the smoking resistor!

Was the resistor broken when it was smoking? Was the wires making contact with the center terminal (wire rubbed through)? Sometimes the resistor will smoke when testing old motors, usually from debris or dirt on them.

Lastly, did you check the resistor ohms?

Just fleeting thoughts... but you may have a short inside the can too..

Are you sure the motor changes speeds when double grounded?

Willcox
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Old 08-23-2015, 03:50 PM
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Is there any place which has the complete resistor insert? I found mine to be partially melted though the resistor coil is still attached but it has become mostly unwound.... ?

i could just replace the resistor but the insert is very wobbly and not securely mounted in the motor (prob cause it had melted a bit)

Thanks..

also... any more progress made by anyone on intermittent wipers for 70s C3's with Wiper Park?
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Old 08-23-2015, 05:33 PM
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radioshack doesnt carry anything close to 20 ohm resistors. autopart stores dont have either. i found on amazon but i have to buy 10 of them..
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Old 08-28-2015, 02:53 PM
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Ended up ordering the resistor from amazon since couldnt find local although had to get 10 of them.. oh well.. this is what my resistor looked like when I pulled everything apart and you can also see the melted area... so definitely needs replacing.

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Old 09-03-2015, 02:27 PM
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Finally received the resistor I needed.. had to buy 10 of them for $6 total.. oh well..

got it soldered and installed.. fits perfectly in the spot.



Had some issues still with wiper run on in which it would park-not park-park-not park.. I cleaned up ground connections plus i had to bend the parking pawl catch a little so it would make better contact. All seems to be working pretty well now and parking as it should.

If i could only work out the "adding intermittent" issue all would be good. I could swear I had another wiper switch for testing but cant find it..
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