Wiper Motor Bench Testing - '79
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,583
Likes: 5
From: Richardson Tx.
Wiper Motor Bench Testing - '79
I am getting some different results when I run the bench motor test done by Willcox.
When I run a hot wire to the middle prong (#2 in their picture), my motor immediately comes on - low speed. If I take that wire off the middle and put it on the bottom prong (#1) then the motor will go to Park - and then stop. If I take it off #1 and put it on #3 (top prong) then it will go high speed.
So, the motor will react even if there is not a constant 12V source going to the middle prong. And I don't have to run a jumper from #3 to #1 to get low speed. (per the instructions).
Do I have a bad switch inside the motor?
Here are the Willcox instructions:
http://willcoxcorvette.com/instructi..._and_newer.jpg
When I run a hot wire to the middle prong (#2 in their picture), my motor immediately comes on - low speed. If I take that wire off the middle and put it on the bottom prong (#1) then the motor will go to Park - and then stop. If I take it off #1 and put it on #3 (top prong) then it will go high speed.
So, the motor will react even if there is not a constant 12V source going to the middle prong. And I don't have to run a jumper from #3 to #1 to get low speed. (per the instructions).
Do I have a bad switch inside the motor?
Here are the Willcox instructions:
http://willcoxcorvette.com/instructi..._and_newer.jpg
Pro
Joined: Aug 2003
Posts: 673
Likes: 0
From: Jackson Ms
Try the Tech video file on Willcox site.
Shows 12v going to #2 and ground to case, motor will go into run-on. Add ground to #3 and will park. Add ground to #1 and #3 get high speed. remove ground #3 get low speed.
Shows 12v going to #2 and ground to case, motor will go into run-on. Add ground to #3 and will park. Add ground to #1 and #3 get high speed. remove ground #3 get low speed.
Last edited by grayhook; Jul 6, 2013 at 12:05 PM.
Le Mans Master
Joined: Dec 2007
Posts: 6,422
Likes: 591
From: McHenry Illinois
The video has an error. You must leave ground to the #1 terminal to get it to park. Once it's parked you can remove the ground from #1 and it will stay parked.
Thread Starter
Drifting
Joined: Feb 2005
Posts: 1,583
Likes: 5
From: Richardson Tx.
When I remove the wire to #3 it will go to Low speed.
This is without doing anything to #1.
If I have my 12V to #2 and then I touch a ground wire to #1 then it will go to Park.
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