windows won't go down.........? - PeachParts Mercedes-Benz Forum

Sash · #1 12-22-2006, 05:05 PM

Hey guys I just pick up the car to day,(1984 300sd 126,617)she runs perfect,only think that don't work is the windows they don't react at all when you hit the switches.Any comments suggestions what can be wrong.......................
Any comments are weary welcome!
Thanks

Sash · #2 12-22-2006, 05:56 PM

And I just know this that the dash board lights are not working ether,my be that is related to the windows............?
HELP PLEASE!!!!!!

Larry Delor · #3 12-22-2006, 06:11 PM

First thing is to check the fuses - closely - they can look good, yet have a hairline crack. Sometimes I use needlenose pliers to turn them a little, just in case the contact points are corroded.

justinperkins · #4 12-22-2006, 06:27 PM

fuses, switches or the motor itself

an easy way to see if power is getting to the motor is:

while the engine is running (idle, parked) operate the switch to the window that doesn't work. if you notice a change in idle speed (it's slight), then power is making it to the window motor, which means the motor is bad.

hey_allen · #5 12-22-2006, 06:59 PM

(slight hijack)
Does anyone know why two diagonally opposed windows would not work?

On my 80 SD, the right front and left rear don't run, but the other two work fine. One window on each switch pair. From the fuses, it looks like they should be connected fronts on one fuse, rears on the other, but I could be mistaken.

rrgrassi · #6 12-22-2006, 07:05 PM

Check the switches also. If they are original, the grease becomes a hinderance, and if the switches ever got something spilled on them, the contacts like to rust an corrode. Also, check the wiring at the door. Sometime the wires either rub or break from the action of the opening and closing. Check fuses like stated above.

Also, do a forum search for inoperative windows, and window switch cleaning.

Sash · #7 12-22-2006, 07:39 PM

Weal I check the fuses, I also turn them around I don't see problem there,I take the switch out and I spray electrical contact cleaner on them,and no luck there nether.
Do you guys have any particular way of cleaning the switches?
any other ideas,riles maybe, related to the windows ......................???????????

Larry Delor · #8 12-22-2006, 08:16 PM

As far as switch cleaning goes, this ought to help: http://www.peachparts.com/Wikka/SwitchRefurb

Sash · #9 12-23-2006, 12:36 AM

Quote:

Originally Posted by Larry Delor

As far as switch cleaning goes, this ought to help: http://www.peachparts.com/Wikka/SwitchRefurb

Thanks for this post,I open the switches and they was dirty,I clean the contacts and put them together,still noting,looks like power is not coming to the switches at all.
I'll double check the fuses tomorow..............................
what else can be wrong whit thise....................????Any other idea?

stcbenz83 · #10 12-23-2006, 12:42 AM

Quote:

Originally Posted by Sash

Thanks for this post,I open the switches and they was dirty,I clean the contacts and put them together,still noting,looks like power is not coming to the switches at all.
I'll double check the fuses tomorow..............................
what else can be wrong whit thise....................????Any other idea?

Maybe work on spelling?

seriously though, try replacing the fuses that go to the windows. I have had a couple fuses that went bad, and looked to be brand new. A voltage meter proved that wrong. Also, maybe try the back window switches in the rear doors. i know on my 300D i thought the back right side door's window didnt work. turns out its just the switch in the front

Brian Carlton · #11 12-23-2006, 01:23 AM

Quote:

Originally Posted by Sash

Thanks for this post,I open the switches and they was dirty,I clean the contacts and put them together,still noting,looks like power is not coming to the switches at all.
I'll double check the fuses tomorow..............................
what else can be wrong whit thise....................????Any other idea?

Remove and replace fuse #7. Clean the brass contacts when the fuse is removed.

Do not look at the fuse or spin the fuse.

Replace the fuse with a brand new fuse.

If the windows don't work, find the power window relay and exchange it with another, identical relay in the box.

The power window relay is inside the fuse box.

There are two rows of relays........one closest to the firewall and one closest to the front of the vehicle.

The power window relay is in the row that is closest to the front of the vehicle. It's the second relay from the right side (passenger side) of the vehicle.

Report back with results.

Brian Carlton · #12 12-23-2006, 01:26 AM

Quote:

Originally Posted by hey_allen

(slight hijack)
Does anyone know why two diagonally opposed windows would not work?

On my 80 SD, the right front and left rear don't run, but the other two work fine. One window on each switch pair. From the fuses, it looks like they should be connected fronts on one fuse, rears on the other, but I could be mistaken.

Can't comment specifically on the W116, but the W126 uses diagonal window logic on each fuse. The LF and RR windows are on one fuse. The RF and LR windows are on a different fuse.

And, all the windows are on a third fuse that feeds the relay.

Sash · #13 12-23-2006, 08:09 AM

Quote:

Originally Posted by stcbenz83

Maybe work on spelling?

seriously though, try replacing the fuses that go to the windows. I have had a couple fuses that went bad, and looked to be brand new. A voltage meter proved that wrong. Also, maybe try the back window switches in the rear doors. i know on my 300D i thought the back right side door's window didnt work. turns out its just the switch in the front

Non of the switches work at all,as I said looks like the power don't go to them at all.
As far as the spelling goes, English is my second language.Learn how to speak on the street

,never took any classes at all.
Come on give me a brake.
Thanks.

Sash · #14 12-23-2006, 08:50 AM

Quote:

Originally Posted by Brian Carlton

Remove and replace fuse #7. Clean the brass contacts when the fuse is removed.

Do not look at the fuse or spin the fuse.

Replace the fuse with a brand new fuse.

If the windows don't work, find the power window relay and exchange it with another, identical relay in the box.

The power window relay is inside the fuse box.

There are two rows of relays........one closest to the firewall and one closest to the front of the vehicle.

The power window relay is in the row that is closest to the front of the vehicle. It's the second relay from the right side (passenger side) of the vehicle.

Report back with results.

DUDE YOU'RE THE MAN!!!!
found a bad relay,
Is a parts store sale those?