No auto park wiper motor on 68 Charger?

[koosh]

So im having issues with the wiper motor that came on a car i bought that needed reassembly. Finally getting to the wipers…. They work fine, both speeds and off. I’ve tried without the arms on. But for some reason this motor has auto park and it never does in the same spot. After a quick picture search of 68 wiper motors, im finding out mine looks nothing like them. (See pics)
Is a 68 supposed to have auto park?

 

[Rishi]

Yes, both the two- and three-speed motors auto-park. What you have pictured looks like a three-speed, to me.

The "park switch" may be dirty, or one or more contacts at the dash switch.

To service the "park switch" remove the cover from the gear sections, and inspect the cam and contacts in there. Dirty contacts affect the parking mechanism and where it stops. Cleaning and lubricating this area may clean up the precision at where it parks.

Mark the position of the cover prior to removal.

I think the service manual has a troubleshooting section for this.

 

[koosh]

For “To service the "park switch"”, does this require removing the motor?

 

[koosh]

I thought it was ok when I repeatedly turn the switch on and off, and it seemed to auto park in same spot… threw the arms on, turned on the switch- bam! Arms go “further down” onto the cowl grille and back up then i turned off and they stopped in middle of windshield! Cant trust it, gonna wreck my paint!

 

[koosh]

Im gonna have to revisit this motor again in the morning…. Im thinking it COULD BE a 3 speed, not sure

 

[BDnFL]

So im having issues with the wiper motor that came on a car i bought that needed reassembly. Finally getting to the wipers…. They work fine, both speeds and off. I’ve tried without the arms on. But for some reason this motor has auto park and it never does in the same spot. After a quick picture search of 68 wiper motors, im finding out mine looks nothing like them. (See pics)
Is a 68 supposed to have auto park?View attachment 1922067

My three speed.

 

[dadsbee]

Of course it's a 3 speed, or possibly a variable speed, just not a 68 3 speed!

 

[MWbirdLOVER70]

I believe 68 uses the Prestolite like the one above

 

[koosh]

So…. Why would my “autopark” act up?

 

[koosh]

Just went back out to the car… i definitely have a 3 speed wiper, and all 3 speeds work as they should. I can shut off a number of times, and parks in same place each time…..if i put wiper blades on, goes bazurk! Starts out going further down then up about 1/2 way.
Is there any chance with a “drag” on the window, it screws up the operating zone?

 

[Billccm]

I recall @Moparfiend troubleshooting this issue and it was the ballast resistor?


Ballast Resistor for wiper motor?

 

[gkent]

I recall @Moparfiend troubleshooting this issue and it was the ballast resistor?


Ballast Resistor for wiper motor?

That's a 2-speed motor !!!!

 

[moes]

just putting it out there, before you take apart the wiper motor clean up the ground strap (brass strip under one of the mounting nuts and where the screw on the motor) to see if that helps or check the dash switch is to see if it is grounded properly.

 

[Jerry Hall]

The gears inside are plastic. If they are worn, they could be skipping under a load. Then again the parking function may not be completed with no load.

 

[koosh]

The gears inside are plastic. If they are worn, they could be skipping under a load. Then again the parking function may not be completed with no load.

Parking function works perfect every time— with no arms on

 

[koosh]

just putting it out there, before you take apart the wiper motor clean up the ground strap (brass strip under one of the mounting nuts and where the screw on the motor) to see if that helps or check the dash switch is to see if it is grounded properly.

Where should the dash switch be grounded? Frame? Can i run a separate ground wire from some place on the switch to a known good ground ?

 

[moes]

Where should the dash switch be grounded? Frame? Can i run a separate ground wire from some place on the switch to a known good ground ?

yes the frame, yes you can run a separate ground wire from some place on the switch to a known good ground ? I would also cleanup the ground strap going from the firewall to the wiper motor to.

 

[koosh]

yes the frame, yes you can run a separate ground wire from some place on the switch to a known good ground ? I would also cleanup the ground strap going from the firewall to the wiper motor to.

Ok…. Is there a “ground terminal” on the switch? Or maybe the switch body gets grounded?

 

[moes]

Ok…. Is there a “ground terminal” on the switch? Or maybe the switch body gets grounded?

I believe the switch body gets grounded to the frame

 

[gkent]

yes the frame, yes you can run a separate ground wire from some place on the switch to a known good ground ? I would also cleanup the ground strap going from the firewall to the wiper motor to.

This is nonsense ... the switch is grounded when its screwed into the bezel which is then screwed into the dash frame.