Window motor loses power. - Ranger-Forums - The Ultimate Ford Ranger Resource


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  #1  
Old 08-18-2010
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Window motor loses power.

Well, my 1994 ranger has this thing where it will work ok for a couple roll ups and downs, and then it seems like it loses power almost like the battery is dieing. I know that obviously isn't the problem, but I don't get why I will get back in the truck the next day, and it works fine for a couple roll ups, and downs again. It's weird, almost like it recharges. Any thoughts would be very helpful.
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  #2  
Old 08-18-2010
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sounds like your regulator is getting ready to go out...spray some silicone in the window track so the regulator doesnt have to work as hard...you help prolong its life a little longer
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  #3  
Old 08-18-2010
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when you roll the window up and down look at your dome light, and see if it dims, and if it does the motor has high resistance. That will cause the circuit breaker to trip and when it cools down, the breaker will reset. If the window stops working, bang on the door panel while holding the button. The motor might be worn out causing the motor to stick.
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Old 08-20-2010
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motor, just replace it
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  #5  
Old 08-21-2010
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Take a hammer and smash it out windows are overrated anyways!
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  #6  
Old 08-21-2010
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I have a slowing motor as well. I just re-lube the regulator and works fine again. There is a track with a shoe sliding side to side in. You need to lube this top and bottom. Also check your switches for corrosion on both windows. This will cause it too.

Make sure you clean the glass. If you got some tree sap on it will not move well either.
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  #7  
Old 08-23-2010
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Hey forgot I made this thread. I'll try to get the panel pulled off this week and take a look at it. Does anyone know how hard it is to replace the motor?
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  #8  
Old 08-24-2010
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Quote:
Originally Posted by ccosgrove71 View Post
when you roll the window up and down look at your dome light, and see if it dims, and if it does the motor has high resistance. That will cause the circuit breaker to trip and when it cools down, the breaker will reset. If the window stops working, bang on the door panel while holding the button. The motor might be worn out causing the motor to stick.
WRONG........high resistance means lower current draw, which means the dome light will not dim. The dome light
dimming is from a high current load on the battery....

Do a google search on OHMS LAW
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  #9  
Old 08-24-2010
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Originally Posted by Takeda View Post
WRONG........high resistance means lower current draw, which means the dome light will not dim. The dome light
dimming is from a high current load on the battery....

Do a google search on OHMS LAW
i understand ohms law pretty well, but when there is high resistance it will draw more current. Now, when you let your window all the way down and hold the button even after the window is all the way down. The circuit breaker will break because of the resistance the motor creates, to prevent damage. The window motor works just like a starter. If a starter motor has alot of resistance, it will require more current to turn the motor over. Which means there will be more of a draw, pulling alot more amps then a normal motor would pull. Resistance is like a water restriction in a water pipe. It will require to put more pressure on that restriction to get the volume that is needed. I have had intensive amount of schooling in electronics, i am Ford certified and ASE certified, So maybe you should REREAD OHMS LAW
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  #10  
Old 08-24-2010
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Originally Posted by ccosgrove71 View Post
i understand ohms law pretty well, but when there is high resistance it will draw more current. Now, when you let your window all the way down and hold the button even after the window is all the way down. The circuit breaker will break because of the resistance the motor creates, to prevent damage. The window motor works just like a starter. If a starter motor has alot of resistance, it will require more current to turn the motor over. Which means there will be more of a draw, pulling alot more amps then a normal motor would pull. Resistance is like a water restriction in a water pipe. It will require to put more pressure on that restriction to get the volume that is needed. I have had intensive amount of schooling in electronics, i am Ford certified and ASE certified, So maybe you should REREAD OHMS LAW


No, I'm going to give you an OHMS law lesson!!

CURRENT = VOLTAGE/RESISTANCE (I=E/R)

So, if the RESISTANCE increases, the CURRENT will decrease

If the VOLTAGE increases, the CURRENT will increase


I'm talking electrical resistance, NOT LOAD on the motors.

Last edited by Takeda; 08-24-2010 at 05:49 PM.
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  #11  
Old 08-24-2010
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ok IKE , But i guarentee that motor has high resistance causing it to pull more of a load. Its like motor is like a resistor on the battery, which would make the dome light dim. And i was talking about resistance causing the load to go up. You were the one that brought up the electrical resistance of ohms law, not me

Last edited by ccosgrove71; 08-24-2010 at 06:42 PM.
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  #12  
Old 08-24-2010
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Tamera your right and your wrong. When the motor is high resistance it is trying to pull more amperage to make the motor keep moving which is why the lights dim
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  #13  
Old 08-24-2010
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yes, thank you ranger4.0
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  #14  
Old 08-25-2010
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Originally Posted by ranger4.0 View Post
Tamera your right and your wrong. When the motor is high resistance it is trying to pull more amperage to make the motor keep moving which is why the lights dim
Load should have been used instead of resistance......
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  #15  
Old 08-25-2010
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Load is resistance
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  #16  
Old 08-25-2010
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Originally Posted by ranger4.0 View Post
Load is resistance

See if you can understand this information.......


Brushed DC electric motor - Wikipedia, the free encyclopedia

Electric motor load resistance
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  #17  
Old 08-25-2010
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funny thing,

The driver window in my 07 is slower than the passenger side -- it sounds like its straining to go down or up...

isn't this uncommon because it's so new?
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  #18  
Old 08-25-2010
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Originally Posted by GrafixGuy View Post
funny thing,

The driver window in my 07 is slower than the passenger side -- it sounds like its straining to go down or up...

isn't this uncommon because it's so new?

Mine is kind of the same. My 04 drivers side has no problem going down but about 1/3 of the way going up it starts slowing down and i speed it up with my hand on the window. My passenger side works just fine.
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  #19  
Old 08-25-2010
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Originally Posted by GrafixGuy View Post
funny thing,

The driver window in my 07 is slower than the passenger side -- it sounds like its straining to go down or up...

isn't this uncommon because it's so new?
My moms explorer did that. (95). lubing the slider for the regulator with silicone lube did the trick.

If these thing don't slide easily the don't work well.
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  #20  
Old 08-25-2010
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Quote:
Originally Posted by Takeda View Post
takeda.... see if you can understand this

Electrical load - Wikipedia, the free encyclopedia
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  #21  
Old 08-25-2010
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Originally Posted by ccosgrove71 View Post
takeda.... see if you can understand this

Electrical load - Wikipedia, the free encyclopedia

Current is inversely proportional to resistance. Meaning high resistance low current.

I really hope you meant high resistance as in high work load on the motor. Not high ohm load draws more current.
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  #22  
Old 08-25-2010
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Quote:
Originally Posted by Blhde View Post
Current is inversely proportional to resistance. Meaning high resistance low current.

I really hope you meant high resistance as in high work load on the motor. Not high ohm load draws more current.
yes that is what i mean.
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  #23  
Old 08-26-2010
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Is there anything with the window regulator I need to be concerned about? I'm worried about this spring in there. I've read they can be dangerous or something, but I'm not real sure what to watch out for.
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  #24  
Old 08-26-2010
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yes... put the regulator in a vice when changing out that motor, it is under enough tension to take a finger off
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  #25  
Old 08-27-2010
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So just c-clamp it so it can't move then I assume??? Haha. I've changed a lot of window motors, but never had one with a spring I guess.
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