Electric Wndows

[sujitroy]

Last night I decided to start tacking my electric window issue on. The drivers side, Fed. '71, doesn't go up or down, but eventually does. I'm suspecting its a mechanical issue, but am not ruling out an electrical issue, The passengers side works OK I swapped out the switch with a spare, but no difference. However, I did dismantle the switch, lost a spring, but had a spare. Good clean and dielectric grease and the switch works wonderfully. I haven't gotten to the root problem yet, but here are a few questions, in the wiring diagram of the switch point 7 and point 2 are grounds. Would anyone have a clue where this ground would lead to on the car? Is this ground shared with the other window switch?


Sujit

[mole42]

My drivers side window sometimes doesn't go up (or down). There's no electrical problem outside the window motor, I've got good voltages at the twowires in the door, so I suspect that the motor itself is dodgy. I have dismantled it in the past but it may be the commutator that is tired, so I've sourced a replacement passenger side one to make a rebuild.

[sujitroy]

Unfortunately,
I can't seem to upload photos in the heic format which Google now uses
Sujit

[wilf]

I mechanically overhauled my leccy windows, only to find the issue was actually high resistances in the various joints and connectors (and there are a few) in the wires feeding them. Voltage looked fine at the motor connections until you tried to operate it, then it plummeted.

mole42 - is your "good" voltage with a load on?

[mole42]

mole42 - is your "good" voltage with a load on?

Yes. I made sure of that - a headlamp bulb lights brightly whichever way the switch is pushed. I can see all the crud that was at the bottom of the door too!

[sujitroy]

Here's an update. I directly applied 12 volts from the battery to the motor at 2 points. 1 in the door directly on the motor wires and then at the switch. I also by-passed the switch with jumper wires. At the same time, I greased up the track at the bottom and applied silicon spray on the felt. The window goes down and up. I did this in the afternoon. Since the stuck window happens when its cold, this morning I tried it at 40 degree F and it still goes down and up. I did this all with the engine off. I dismantled and cleaned the switch. The switch operated very smoothly now. I'm going to leave the door panel off for a few weeks and monitor it. I plan to look at the length of bolts holding the motor on the door.

Sujit