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[Lil'John]

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[Big Sexy]

Several things actually...

First thing is to disassemble the entire regulator system, which, if you've never done this before it will be something you'll not want to reaccomplish anytime soon.

The most likely culprit is the nylon gear followed by rusty / corroded side regulators.

There is plenty of post on this subject if you get stuck, but best course of action is to get it all broken down. You'll find the nylon gear inside the motor assembly and most likely it's cracked and binding the motor.

Hope this helps

 

[J Mack]

Title kind of a states it.

On mine it's the index finger on the switch is the up/down limit. YMMV

 

[J Mack]

I am wondering what, if anything, prevents the motor from just eating the gears when bound

A relatively low torque motor is the limiting factor under normal circumstances, aging plastic gears transfers the limiting factor to themselves.

A limit switch could easily be added to the circuit but could just as easily create a new set of issues keeping everything adjusted properly.

 

[yelmarb]

Good insight into this, seems a likely cause on why the plastic gears break.

 

[cruiserbrett]

There is a interlock. But only for the tailgate handle operation.


In 1968-1979,(whenever recently new) the circuit breaker would have tripped before the stopped motor, acting as a dead short, damaged the now fragile gear. Unfortunately, fast forward 30 years and we have fragile gears and not so agile equal age circuit breakers.

Iirc, tailgate circuit breaker is located on or near the brake pedal bracket.

 

[Voodoocruisers]

When the circuit breaker trips it makes an audible pop...It takes several seconds before it resets. Don’t ask how I know this