Re: Power window failures

Posted by Dave Brownell On 2014/6/30 13:50:15

I pulled the motor and gear assembly from down in the barn and gave it a good look and cleaning. It is now much prettier, and the grease has been replaced in the little worm gear box. The sector looks to be intact and the shaft turns things freely. I am surprised at the amount of spring tension exerted by the coiled spring...it must be15-20 pounds. With everything loosened and lubed, that's quite a push for a little electric motor, no matter the gearing ratio.

I do appear to have some sort of thermal limiter inside the motor housing. I plan on taking it to my auto electric guy for a little diagnosis and to reset the brush assembly. There's no marking that I can find to indicate whether it's a Delco or a Leece-Neville motor. The black painted steel cap doesn't look a lot like the later Delco units I have seen from GM cars ten years newer. I will ask the guy for his opinion on the maker and whether this unit is suitable to put back in the car. The only part number I could find was 13723 LH. I am presuming that the "LH" stands for Left Hand, although the car needs it at the right hand rear hardtop window position.