Is there an article that explains (pictures maybe?) what goes on in that little machine?

When you shut it off, power is directed to the motor to "Park" the arms. What opens that circuit?

How do the arms change direction to park?

Thanks for any links of info. Neil

my memory is that the park feature is a constant hot (in run) circuit that breaks the ground path when the motor reaches its "park" position. For the reversing to park units I believe that the park circuit is reverse polarity to normal units.

This may all be completely wrong info I haven't looked into wipers wiring in quite some time.

this is a quick search of 2 speed units, 3 speed is more or less the same with another speed.

https://www.forbbodiesonly.com/moparfor ... pg.865811/

No, the 1- or 2-speed motors are not the same as the 3- or variable-speed motors. The 2/1-speed motors do not have the retracted-park feature; the 3/variable-speed ones do. Retracted-park (or "off-glass park") runs the motor in reverse when you switch off the wipers, and there's a complex multipiece cam in the linkage which, when run in reverse, lengthens slightly to pull the blades down lower than just stopping them at the bottom of their normal travel. This motor-reversed operation is handled by the park switch, which is built into the wiper motor gear housing. It's arranged such that the motor operates in reverse only until the driven gear (and therefore the crankshaft) reaches a particular position, then the park switch opens and the motor stops until it is switched on (when it runs forward). The park switch has to be timed correctly; adjustment is covered in the FSM.

That complex cam is a stinker to put together correctly; it's a sandwich of parts and springs and special washers, all of which have to be correctly lubricated (Led-Plate is extinct; good riddance – closest stuff available now is going to be a graphite anti-seize paste), correctly put together in e right order, and correctly fastened in place.

Lemme see if I can find the old-old Slant-6 News article which, if I'm remembering it right, might provide some edification.

…Here it is, from the March '88 issue.

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