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Electric Motor Question

Hi. I have a 500W variac (auto transformer) and I wish to purchase an electric motor that I can use the variac to regulate the speed of. Many electric motors won't slow down if you lower the voltage, instead they run at the same speed, sound quieter, and, when the voltage drops below a certain level, draw heaps more amps, but stop working. I have read on the internet that a 'shaded pole motor' will work on a variac, but what about a 4 pole motor? Any advice would be appreciated. Thanks

PS Excuse the strange product category, but I had to enter a valid product.

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  • DrSpook Nov 12, 2009

    Your variac will control the speed of a bushed motor, so long as the wattage of the motor is 500 or less. Shaded pole motors are generally low power motors, such as the type used in electric fans, and will be no good for any heavy work. Induction motors are 'brushless' motors, and can only be controlled by lowering or increasing the frequency of the power. Brushed motors are cheap if you get them second hand or reconed. Hope this is of help.


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Posted on Feb 27, 2009

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Fix windows they wont go down any more,, fuses look ok

There can be several reasons. When you say you "fixed" the windows, it makes me wonder what was wrong with them before you started. The part inside the door is usually a window regulator. It has teeth to be moved by the gear on the electric window motor. The position of the regulator teeth is suppose to match the position of the window. If you imagine setting the window 1/2 open, then that is as far as the window will rise when the electric window motor cranks. The electric motor gear will only travel so many turns for each cycle of the motor switch.

Mixing motors on the wrong side of the car is something else that can go wrong if you change W motors. The W motors are not the same from front to front or rear to rear. They are often compatible diagonally (right front to left rear) (left front to right rear).

Finally, you can have a switch box for the auto up/auto down feature inside the door panels. You need to check for power at the W motor and then backtrack.

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1997 mercury grand Marquis driverside rear window motor works but window won't go up. Inner door panel off. Metal cable with a black foam cover and pink plastic clip off. Can't figure what it fits to.

usually this means you need a new window regulator.

Section 01-11: Glass, Frames and Mechanisms 1997 Crown Victoria, Grand Marquis Workshop Manual
REMOVAL AND INSTALLATION Window Regulator, Power Front Door
  1. If front door window glass (21410) is in the down position and is inoperable, the following steps must be taken; if front door window glass is operational, go to Step 2.
    1. Remove front door trim panel (23942) and front door trim shield (237A04). Refer to Section 01-05 .
    2. Disconnect battery ground cable (14301). Refer to Section 14-01 .
    3. Disconnect window regulator electric drive harness connector.
    4. sva~us~en~file=ani_caut.gif~gen~ref.gif CAUTION: Be careful not to strike or scratch front door window glass because it can break.
      Remove window regulator electric drive retaining screws through holes.
    5. Remove window regulator electric drive (23394) from front door power window regulator.
    6. Raise front door window glass to full up position by hand and secure with tape.
    7. Go to Step 5.

  2. Remove front door trim panel and front door trim shield. Refer to Section 01-05 .
  3. Remove front door window glass as described.
  4. Disconnect window regulator electric drive harness connector.
  5. NOTE: Use care not to enlarge sheet metal holes in the door inner panel.

    Remove two 1/4-inch rivets retaining lower bracket of front door power window regulator to inner panel. Use drift punch to knock out center pins for each rivet. Using a 1/4-inch diameter drill, drill out remainder of rivet.
  6. Remove three window regulator electric drive retaining screws from inside door to remove window regulator electric drive from front door power window regulator.
  7. Remove two window regulator retaining nuts.
  8. Remove front door power window regulator from front door (20124).
  1. Lubricate regulator mechanism with Teflon® Lubricant E7FZ-19590-A or equivalent meeting Ford specification ESB-M1C111-A.
  1. Install front door power window regulator minus motor (23208) into access hole in inner panel.
  1. Position front door power window regulator using upper studs and tabs on window regulator electric drive mounting bracket.
  1. Install rivets retaining front door power window regulator to door inner panel (1/4-20 x 1/2 inch screw and 1/4-20 nut and washer assemblies or equivalent metric fasteners may be used).
  1. Install two upper front door power window regulator retaining nuts.
  1. Install window regulator electric drive with three screws. Do not overtighten screws.
  1. Connect the window regulator electric drive harness connector.
  1. Install front door window glass.
  1. Adjust front door window glass as described.
  1. Install front door trim shield and front door trim panel. Refer to Section 01-05 snorkelbobby_38.gif

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1 Answer

My VW passat 2001 model has passenger door electric window stuck. I can hear the motor running on the door. How can I fix this problem.

The window regulator or plastic tabs attached to the glass is likely broken and will need to be replaced, if you can hear the motor running but the glass does not move. If you're handy with fixing cars, you can purchase a window regulator and change it out fairly easily by removing the door panel and swapping the regulator out. If the plastic tabs on the glass are broken, you will have to take it to an auto glass shop to have new tabs replaced on the glass.

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1 Answer

How do i dissasemble the passenger side door pannel? the window will not go up or down. i think its off the track

You need to buy a window regulator and motor assembly and replace the unit as a whole. The plastic slides wear out or the plastic ends break off the electric motor cables. A new regulator and motor is around $100 at the auto parts stores. If you pay to have it fixed it is around $350.00

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1 Answer

I have a Ford EF Futura wagon , the drivers door electric window will go down but not back up, how can I get the window to go back up, is it possible for me to fix this problem at home? Thanks Les


You should first determine if the window switch (centre console) is sending power to the door motor, in the "UP" position.

If the motor is 'trying' to operate (i.e. you can hear the motor click when switch is UP), then the glass may simply be jamming in the tracks, or needs adjusting on the regulator rail.

I would recommend you buy some Graphite Powder and springle it down both the inner/outer tracks to lubricate.

If no power is evident to the motor, then you should suspect bad (or damaged) contacts inside the switch.

If you're unsure about the switch but confident enough to remove the inner door card/panel, then you can try connecting each of the window motor "wires" to a terminal of another car battery - this will manually operate the window motor. Then, connect to opposite battery terminals to power the motor in the opposite direction.

If the window motor proves faulty, then obtain you could obtain a 2nd hand electric door regulator from your local auto wrecker.


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2 Answers

I need help with replacing the driver side window in a 2003 ford f-150,four door super crew cab truck.

Removal & Installation
Motor - Front Door
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Remove the window control switch
  3. Remove the front door trim panel and watershield.
  4. Tape the window in the full UP position.
  5. Disconnect the window motor electrical connector.
    NOTE Support the window motor while removing the window motor retaining screws.
  6. Remove the window motor bolts and remove the motor.
  7. To install, reverse the removal procedure.
Rear Door
  1. Before servicing the vehicle, refer to the Precautions section.
  2. Remove the window control switch.
  3. Remove the rear door trim panel and the rear door trim watershield.
  4. Remove the door speakers.
  5. Tape the window glass in the full UP position.
  6. Disconnect the window regulator electric drive.
  7. Position the connector for the window regulator electric drive inside of the door.
  8. Remove the bolts.
  9. Separate the window regulator electric drive from the rear door window regulator.
  10. Remove the window regulator electric drive from the door.
  11. To install, reverse the removal procedure.

Motor & Regulator


Fig. Front Door Trim Panel


Fig. Rear Door Trim Panel-Crew Cab

Regulator - Power Windows


Fig. Window regulator arm nuts


Fig. Window regulator bolts

  1. Before servicing the vehicle, refer to the Precautions section.
  2. Remove the window control switch.
  3. Remove the door trim panel.
  4. Remove the door speaker.
  5. Remove the door watershield.
    NOTE Do not remove the window glass from the door.
  6. Remove the window glass from the window regulator.
  7. Tape the window glass in the full UP position.
  8. Disconnect the window motor electrical connector (power windows only).
  9. Loosen the window regulator arm nuts and pull the arm from the mounting position.
  10. Loosen the bolts and remove the window regulator.
  11. To install, reverse the removal procedure.

Hope helped with this. Good luck.

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