Wiper Arm Alignment

[gzig5]

Is there a trick to installing the wiper arms onto the splined drive hubs?  What is the proper alignment to the lower windshield trim at rest?  There doesn't seem to be a keyed position so they can go anywhere.  As soon as I can find the blade inserts I bought and stored somewhere last year  I want to get them on.

[RUNCHARGER]

The lower windshield trim has a raised shelf built into it that the wipers will sit on in the down position.

[70 Challenger Lover]

Is there a trick to installing the wiper arms onto the splined drive hubs?  What is the proper alignment to the lower windshield trim at rest?  There doesn't seem to be a keyed position so they can go anywhere.  As soon as I can find the blade inserts I bought and stored somewhere last year  I want to get them on.

I'd turn the motor on and off first so you are absolutely certain the motor is at rest. Then I'd put the arms on with them set on the trim stop at the bottom. Not sure if Mopars are immune to this but when I was younger, I remember putting arms on a GM car of some kind and when I tested it afterward, the motor tried returning to its rest point, driving the wiper arms down into the cowl and screwing everything up.

[gzig5]

Finally found the wiper blades I ordered and misplaced.  Ran the motor and linkage without arms and I'm not getting a consistent parking position.  Seems to be worse on low speed than on high speed (two speed motor).  I think I have identified where it wants to park but it only does it 30% of the time.  I haven't done any research yet, but is there a user adjustment somewhere or is that internal to the motor/gearbox?  What causes the variation?

[70 Challenger Lover]

Someone else will need to chime in on that. I know very little about these systems.

[JS29]

Bruce Somer, email somerbr1@aol.com is the guy who helped me out. 

[anlauto]

Sounds like a bad ground

[gzig5]

Will check the grounds out.  I've got other issues behind the dash already that indicate less than optimal wiring. 
All the wiper parts (motor, linkage, etc) were removed when I got the car so and while I think I got the drive back together correctly it only took me one try, and that would be an unusual success ratio for me. 

What about a tool/method/technique to extend the spring at the pivot base of the wiper arm so you aren't fighting it while trying to line up that fine pitch spline in the hub?

[Rich G.]

They do have a tool to put on and take off the wiper arms. This is an old snap on tool from my fathers gas station days. Works great.

[gzig5]

That's cool.  Thanks for the pics.  Long out of production and none on ebay.  But this may be the modern equivalent?   It will be here tomorrow for about $4 and free delivery.  I'll report back on how it works.

https://www.amazon.com/Dorman-49023-HELP-Windshield-Wiper/dp/B002H9ABXS/ref=sr_1_1?keywords=Dorman+49023&link_code=qs&qid=1567191914&s=gateway&sourceid=Mozilla-search&sr=8-1

[Katfish]

Please do update, interested too

[Shane Kelley]

My RR has a 2 speed system. I find that to be a very quirky set up. Sometimes mine works perfect and others it will park in the wrong place. Sometimes it won't shut off. I have spent countless hours trying to perfect it.    Good thing is I don't drive it in the rain except when I get caught out in it.

[gzig5]

The Dorman tool works nicely.  You need to find where the pivot point wants to be, but it seems to straighten the arm out easily.  Seems to have a good grip on it.  Well worth the $4 investment and I can tweak it if there isn't enough bite on the hook.

I also ran a bonding jumper from the battery negative to the wiper motor body.  Turned it on and off a dozen times and it seemed to always go to home from hi or lo speed. Took the jumper off and it mis-parked on the third try.  So I'll figure out how to bond the motor better.  I have some nice braid to use and we'll see how that works. 

My wipers are for emergency use only.  The windshield and aftermarket sunroof leak pretty badly so I really have to be careful about getting caught out in the rain.

[Rich G.]

Glad the tool worked out for you. I found running a ground wire on the wiper switch mounting plate solves a lot of the problems with the wipers

[Katfish]

Thx for the update, I wonder if the $6 Lisle tool works any better.
It showed up when I looked at the Dorman link you posted.