the rear drivers side power window on my 2002 Acura el 1.7 only goes down, i replaced the motor and regulator assembly and i know its not the switch because i used thay switch on the other window and it worked fine, what could be causing this?
I'm still going to go into one of my long-winded explanations but I'll give you the option to spare yourself of enduring it.
The short explanation for what's happening is you have a broken ground wire and if you open your Driver's Door and look at the door jamb between the front and back doors it's inside this flexible conduit coming out of the back door.
The wires in there get "fatigued" from the movement of the door opening and closing over the years and they sometimes break.
.......and something like this happens:
You can scroll down to the end of my post and I'll Link a video of a guy doing the repair on a Civic, which is basically the same as your Canadian Acura EL just not as fancy.
Ok, I warned you....
So to wrap your head around what's going on here let's look at the wiring diagram.
See how when Neither the Driver's Door Master Switch for the Rear driver's side window NOR the Back Door Driver's Side window switches are toggled, GROUND is being provided to both wires going to that window motor.
So what have you ruled out? You've ruled out the motor and regulator assembly, you replaced it. You tried swapping the switch with a known good switch. That didn't help.
So looking at the diagram you know you're getting Power to that switch or else the window motor wouldn't work in the Down Position.
So what's left?
Let's look at a Close Up when the window switch is toggled to the UP Position.
So, you know the switch is good. You know the motor is good. You know you're getting power to the switch because the switch works in the Down Position.
What's left? That Ground wire going to the Down Side of the switch.
If it were broken in that flexible conduit the Window Motor would have Power AND Ground in the Down Rotation of the motor.
It would work fine. But the switch wouldn't have Ground in the UP Rotation of the motor and even though it had power, the motor can't operate without a Ground. So, NO UP rotation direction of the motor would be possible.
So how can you test this theory? Very easily. When your window switches are "at rest" unplug the motor from the harness in the door. You replaced the motor so you know exactly where it is.
Do you have Ground going to BOTH Wires at the connector to the window motor when the window switch isn't toggled in the UP or Down position? You should. Use a test light to find out.
Anyhow, here's that video
https://www.youtube.com/watch?v=oa9aI9BDVyY
Thanks a bunch, this seems like the issue, I'll get a test light and let ya know how it goes
Just remember, those "Ground" wires are only "Grounded" when the Driver's Door Left Rear window switch is at rest
.
When the Driver's Door Left Rear window Master switch is in use, depending upon if it's toggled UP or Down, one of those Ground wires become a Power wire to operate that window from the Driver's seat
.
That's why you can't just "Jumper wire" the Ground from one side of that rear window switch to the other side to fix the problem
.
You'd blow a fuse every time you tried to operate that window from the Driver's door
How do the rails look? If it slides down easy but you can't push it up by hand then you got a problem there. That would be common though. If uncommon I would move on to wiring. If any pin outs are loose or broken that would be the next thing to check.
