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liljon's924S's Avatar
 
Join Date: Oct 2005
Location: Lancaster, PA
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confused about windows, again

alright I finally got new switches, put them in and only the passenger side goes down(but not back up), and the drivers side doesn't work at all? so now what? I took the relay out(I know its the right one because I blew a fuse by accident) and it has pt#321 919 505 on it and it has 4 prongs, if I remember isn't it supposed to be a different pt# and have 5 prongs? 5 wires go tothe connector but the relay only has 4 prongs. Any help would be a good thing, thanks

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"I couldn't find the sports car of my dreams, so I built it myself."
-Dr. Ferdinand Porsche
'87 924S Guards Red, 944 turbo bars, 220lb. springs, Restoration Project even though its and original, 72,000 mile car
'93 325is Red, aftermarket rims, pirelli tires, 95,000 miles
Old 01-29-2007, 02:03 PM
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I am not sure about the 924S but they are usually very similar to the 944. The 944 takes part number 944.615.116.00-M76 and the picture has five contacts on the side but I didn't take mine out to verify. Might be worth a call to Pelican tomorrow to see if that is the right part. It very well could be the wrong relay. Did your windows ever work or did they stop working?
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1990 944S2 Cabriolet
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Last edited by Razorback1980; 01-29-2007 at 06:48 PM..
Old 01-29-2007, 06:45 PM
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The 321 is for the early 924's and 944's. I find a 944.615.112.01 listed just for the 924S's.

It's possible that the 116.00 m76 is an all in one replacement. The schematic does show five pins on the relay. However all of the window relays just pass the main power though from pin 2 to pin 4 or relay pin 30 to 87.

I think you have some bad wiring going through the door and into the chassis. You need the schematic for the 87 924S.
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Old 01-29-2007, 08:26 PM
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Here is the schematic:

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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 01-29-2007, 08:29 PM
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I think the 924s is the same wiring as early 944s and they have been known for screwy windows. Did you replace all three switches, taking them apart and cleaning them couldn't hurt. That's how I got mine to work at least.
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Old 01-29-2007, 09:53 PM
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As per SoCal Driver's schematic, here's how it works.

Red = +12V
Green = ground

1. Relays pins 2 & 4 is +12V power. Jump those pins in the socket to get power if relay is bad.
2. When switches are OFF, you should get +12V to ground on all switches at pins 1, 4, 5 & 2. Window motor will get +12V to ground on both terminals.

3. When you push driver side pass window switch, +12V is maintained on pins 2, 5 $ 4.
But this time, pin 1 is directed to pin 3 that leads to ground. The motor should operate the window.


Hope that helps.
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Old 01-30-2007, 07:32 AM
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Reversing switches are such a headache! Then you add a remote reversing switch and all heck breaks loose. As you can see by the logic flows it's not the main relay as all it does is switch the main power to the windows.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 01-30-2007, 07:50 AM
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The drivers side has always worked, up till now, the passenger side used to be touchy, I think it was because I had a bad switch, but now with new switches the drivers side doesn't work at all and the passenger went down but didn't go back up.
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"I couldn't find the sports car of my dreams, so I built it myself."
-Dr. Ferdinand Porsche
'87 924S Guards Red, 944 turbo bars, 220lb. springs, Restoration Project even though its and original, 72,000 mile car
'93 325is Red, aftermarket rims, pirelli tires, 95,000 miles
Old 01-30-2007, 12:51 PM
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You now have as much information as the rest of us.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 01-30-2007, 04:37 PM
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Don't get crazy, go back to the simple stuff first. Are the new switches set properly in the sockets? Are the sockets clean? Test the new switches out of the car, reading resistance with your meter.
Unless I am reading the schematic wrong the relay is just to accomodate the 2 switches that operate the passenger window. It should not cause the driver's side window problem. The switches are usually the problem.

Jon
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Old 01-30-2007, 05:33 PM
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Wow, SoCal's diagram should be more than enough plus the color coded current flow.

You may want to take it to an automotive electrical shop. Electrical issues are sometimes way over our heads.
Good luck.
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1993 964 C2 still makes me smile
Retired and work as needed as a pain in the **s.
Old 01-30-2007, 05:50 PM
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Electrical problems are a hands on fix. You have to start testing then redirect your testing depending on the results you get.
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Hugh - So Cal 83 944 Driver Person
NOT a 'real' Porsche -- Its Better!!!!
When was the last time you changed your timing and balance belts and/or cam chain and tensioner?
New Users please add your car's year and model to your signature line!
Never break more than you fix!
Old 01-31-2007, 09:59 AM
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I agree, that's why it costs so much to diagnose electrical issues at shop labor rates.
Mechanical issues, at least you can see the damage visually right off the bat.

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1993 964 C2 still makes me smile
Retired and work as needed as a pain in the **s.
Old 01-31-2007, 02:06 PM
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