passenger side window wont roll up!!!

[chaos2000]

so like the title says the passenger side window wont roll up. i changed the window motor and i changed the power window amp and it still wont roll up. even more strange is that when i checked the voltage to the plugs there was the right voltage so its getting power, i have no idea what could be the issue, please help.

[OutToWinPAHC]

Is it off track?

[chaos2000]

nope, everything is as it should be.

[coolbone28]

you can hook up a 12v wire (directly from the batt.) to the wires for the motor and it should move..then you can start back tracing. If it still doesnt do anything or make any noise, then chances are that motor is bad.

[biggie]

To state the obvious, did you make sure the window lock isn't on?

[Promise Land]

I am having a similar issue with my passenger window, but mine is in the up position but won't go down or up. I took it apart yesterday and the window will go down without the motor connected to the regulator. I have power going from the switch to the motor (12.7v) for up/down function. I bought a new motor (used) but when I tried to hook it directly to the battery to won't work either. Not sure how the motor grounds, but I assume it is through the body assembly connection to the door metal.

Anyone have any ideas that I can try next? It has me baffled.

[moso]

240sx window motors dont ground through the body, they are direct wire. hit one lead up with hot and the other with ground and it will roll up/down, reverse polarity to do the opposite. if the motor wont function like that than it is bad.

[sabretooth91]

240sx window motors dont ground through the body, they are direct wire. hit one lead up with hot and the other with ground and it will roll up/down, reverse polarity to do the opposite. if the motor wont function like that than it is bad.

Isn't the chassis connected to ground? So, wouldn't connecting it to the chassis be the same thing as connecting to ground?

[compactfean]

the chassis is ground. The most common problems I see with electric windows, door locks, defrost on the hatch etc. Is the wiring breaks between the door and car right where the hinges are, from being 20 year old cars and doors and hatches being opened and closed 100,000 times. You will have to peal back the rubber cover to see it.

[moso]

240sx window motors dont ground through the body, they are direct wire. hit one lead up with hot and the other with ground and it will roll up/down, reverse polarity to do the opposite. if the motor wont function like that than it is bad.

Isn't the chassis connected to ground? So, wouldn't connecting it to the chassis be the same thing as connecting to ground?

I guess if you look at it that way then yes, chassis is ground. but if your looking at that particular wiring application then no, the window motor does not use the chassis for its direct ground, instead it gets ground from the same wiring that it gets power. the wiring in the window is a flip-flop circuit and changes the polarity given to the motor based on the switch position. in-other-words if you apply power to one lead and ground the motor to chassis you will get nothing, if you apply power to one lead and ground to the other lead the motor will function. if you dont believe me look at the wiring schematic. I do agree with compact on the fact that most wiring problems on the doors of 240s happen at the hinge from being used a bazillion times in the last 20 years or so.

[sabretooth91]

ok, moso. I get that. I haven't looked at the wiring diagram, but I believe you. I know how DC motors work, so yes if you change the polarity of +12V and GND across the two motor pins, then the motor will spin in the opposite direction. It is my understanding that you're still using the same signals, GND and +12V though, correct? This is how I would imagine it works:

Motor spins one way:
Motor +Pin - +12V source
Motor -Pin - GND

Motor spins the other way:
Motor +Pin - GND
Motor -Pin - +12V

If I'm wrong, let me know.
I would use a Double Pull Double Throw switch to do that, with three positions, On-Off-On(opposite polarity).

Is this anything like the wiring diagram? lol. If so, it is still the same GND signal that comes from the chassis and the negative terminal of the battery, just connected to the other pin.
I should just re-do all of the wiring in my car so it all makes sense to me. If I ever sell it, the guy (or gal) would be screwed!

[moso]

you got the right idea, the switching system is a little more complex than a simple 3position switch but it serves the same function. if your giving your motor direct current and it wont function, switch polarity, still nothing....throw it away.

[sabretooth91]

you got the right idea, the switching system is a little more complex than a simple 3position switch but it serves the same function. if your giving your motor direct current and it wont function, switch polarity, still nothing....throw it away.

Do these motors have speed controllers like an RC car? If so, a speed controller could be fried. However, I can't imagine why they would have those. I would just connect the 12V and GND right to the motors themselves. The speed is really on or off.

[moso]

no speed controller, its on or off.

[Promise Land]

If I have power from the white/black wire (power in) to the motor, would a break in the red/white and red/black cause the motor to not work? These are the wires coming from the driver's switch assy.

[sabretooth91]

If I have power from the white/black wire (power in) to the motor, would a break in the red/white and red/black cause the motor to not work? These are the wires coming from the driver's switch assy.

I image a break in any wire would cause it not to work. Can you probe what the voltages are on those wires when you press the window button?

[allenms240]

To state the obvious, did you make sure the window lock isn't on?

BAHAHAH. True. My girlfriend was freaking out her vert's window wouldn't roll up. I pull up, push the switch, and walk away. WOWOWOW

[sabretooth91]

To state the obvious, did you make sure the window lock isn't on?

BAHAHAH. True. My girlfriend was freaking out her vert's window wouldn't roll up. I pull up, push the switch, and walk away. WOWOWOW

Ha ha. I love those fixes. You are a God, lol. Just don't make her feel too dumb. Girls are sensitive about that kinda stuff. I'm speaking from experience.