Power Windows Regulator

The mechanism that moves the window up and down is called the window regulator. In some cars, the window motor comes with the window regulator as one unit while in others, the window motor can be replaced separately. 

There are two basic types of window regulators: the cable type and the gear-drive type. It's easy which is more prone to fail.

A cable-type window regulator (Ford)

A gear-type window regulator (Toyota)

There is one window regulator in each door. A window regulator doesn't need any maintenance or adjustment. If it fails, the failed part or the whole unit must be replaced.

Window Regulator Common Problems

A broken window regulator cable can cause the window to jam or fall down inside the door. See this example below, where the cable broke and the power window stopped working.

A failed window regulator

Worn out cable guides or a frayed window regulator cable can cause abnormal noises when the window is moving. For the same reason, the window may not go up or down all the way. If this happens, in some cars, the window can be re-secured without replacing parts, in others the window regulator might need to be replaced.

Symptoms of a Bad Window Regulator:

A car is considered unsafe when power windows don't function properly. 

- the window falls down inside the door

- abnormal noise when a window is moving up or down

- the window rises slow, jams or doesn't close fully

- the window slides up or down crooked

- when the window switch is pressed, the window motor runs but the window doesn't move.

 

Fixing A Faulty Window Regulator

I recommend visiting a good repair shop if you have a problem. Troubleshooting a failed window on your own may be difficult. If you insist however, here are some pointers; 

Window motor runs but the window jams or doesn't move: In this case, we know that the window switch, the wiring and the window motor work. That means the problem is with the window regulator. You would still have to take the door cover off and check if the window motor gear is not damaged and if the glass is still connected to the regulator. A visit to the technician sounds good eh?

Power window goes down, but not up, the motor is not running when the switch is in "UP" position: Now you know the motor works. The main switch on the driver's door is common to go bad. You can try wiggling the switch in "UP" position and if it makes the window motor run, then you know the switch is bad. If it doesn't, then you would have to follow the electrical diagram and check the power window circuit. Complex? Take it to your technician?

The window goes down OK, but is slow going up: You would have to check the window run channels and the window regulator mechanism. Sometimes window run channels wear out or shift out of place. The window run channel is not expensive and is not very difficult to replace. Often lubricating window channels with a special silicone lubricant (or some oil for the short term)helps. The sliding parts of the window regulator may also need to be greased. If lubrication doesn't help, the window regulator may need to be replaced. Technician!!!

The window goes up but then backs down: In many cars the power window have the anti-pinch function that reverses the window from going up when an object is pinched by the window. Sometimes, after the window motor or regulator has been replaced or the power has been disconnected, the initial power window settings must be relearned for anti-pinch function to work properly. The re-learn procedure is different for different cars. Try googling "power window re-learn procedure Make Model Year", there'll be plenty of YouTube videos waiting., or Technician?

A window motor

Nothing happens when the window switch is pressed: If the window motor doesn't operate at all, the first thing to check is the fuses. If the fuses are fine, the next step is to check the voltage at the motor and test the motor itself. It's not uncommon for a window motor to go bad. Just take it to the technician sir!

Window regulator replacement

It is a reasonably difficult task. You might need to enlist one of your friends to help, as the glass needs to be held in the top position while the window regulator is replaced.

It's also very common for door cover clips to break whenever the door cover (panel) is removed. You may want to order a couple of new clips. Typically, there are 8-10 clips holding the door cover. Just go to a technician.

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Email; vverteautosevcs@gmail.com
Phone; 09137103730

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