Wiper motor runs but won't park., Can't anything be easy? Options

[Olympic 914]

Ok I got the wiper mechanism cleaned up and lubed and was ready to install.. So I thought....

I wanted to be sure it ran and was in the park position before I replaced it. looked up the procedure in my Haynes manual, ( Clymer manual has same procedure)

Connect a 12V Neg line to ground.
Connect a 12V Pos line to both terminals 53 and 53a.
When motor starts to run disconnect term 53 and allow motor to park.

Doesn't happen.

As soon as I disconnect 53 motor stops wherever it is.

power to 53 runs low speed.
power to 53b runs high speed.
power to 53a alone does nothing.








Although not in the instructions power to remaining terminal 31b also does nothing.

Checked to be sure all the contacts were touching and they appear to be. Gave them a little brush with a points file to be sure.



all three are making contact, you can see the tracks in the grease.




No sense in putting this thing back in until I get it sorted out.

BTW if it makes a difference, car is an early 73. No intermittent wipers. all testing done on bench.

Edit:

Adding another picture, this was taken before I disassembled everything. two red/black wires go to pin 53a. ( on Prosperos wiring diagram it shows 2 red wires - no black trace)

[73914]

My very first post...ready? I just dismantled my ‘73s non-functioning wiper motor and found heavy grease smeared thickly all over the electrical contact area on the ring gear. I cleaned the contact area and removed what I considered an excess of grease. (Noticed how clean this area was in your pics) Re-assembled and when tested the motor has both speeds and park function. (IMG:style_emoticons/default/smile.gif) Grease was the problem, or is there supposed to be a conductive lubricant there? The only other thing I did was bend two of the three contact arms a little for better contact. By the way, I found the wiper mechanism seized, with rust on one wiper “post”, which I have cleaned and lubricated.

[vitamin914]

My very first post...ready? I just dismantled my ‘73s non-functioning wiper motor and found heavy grease smeared thickly all over the electrical contact area on the ring gear. I cleaned the contact area and removed what I considered an excess of grease. (Noticed how clean this area was in your pics) Re-assembled and when tested the motor has both speeds and park function. (IMG:style_emoticons/default/smile.gif) Grease was the problem, or is there supposed to be a conductive lubricant there? The only other thing I did was bend two of the three contact arms a little for better contact. By the way, I found the wiper mechanism seized, with rust on one wiper “post”, which I have cleaned and lubricated.

(IMG:style_emoticons/default/welcome.png)

@73914

Welcome to the best 914 forum around !!!
And welcome to a fellow Canuck... (IMG:style_emoticons/default/cheer.gif) (IMG:style_emoticons/default/beerchug.gif)

No to electrically conductive lubricant. It has to be a dielectric or insulating grease otherwise it would short everything out. Most likely the slight adjustment on the contacts did the trick. Excess grease could have added to the problem if the contact could not make an electrical connection through the grease.