CVTLOPE

1995 C4 Coupe.
Lowered Driver's window this morning. Won't come back up.
Feels electrically dead. No grinding/stripped plastic gear noises.
Passenger's side is okay.

One clue - if I toggle the Driver's door mounted power window switch back, as if lowering window, then release it, there is a 'click' after the release.
Sounds like a relay & seems to be coming from behind dashboard, over on RHS.
Not sure if the 30 amp Power Window Circuit Breaker 'M' in the fuse box covers each door window independently, or if it goes, both windows would be immobile??
Any suggestions for troubleshooting, fixing, appreciated
CVT

antfarmer2

Take the two screw out of the bottom of the door pull and lift it out with the switches look for bad connections.

Polo Vert

Mine was doing that too. The drivers side switch assembly is tough to find. I carefully took mine apart and cleaned all of the contacts in the switch. Works fine now. The contacts get a little carbon buildup over time.

CVTLOPE

I had a quick look yesterday & it looked pretty tidy, no broken wires etc. But I didn't disassemble it. Will go that route & see if it does the trick.
Thanks
CVT

kg4fku

Does your driver side switch still control the passenger side window?

CVTLOPE

Yes.
No problems with Passenger's side window.
CVT

kg4fku

I have been looking for a wiring diagram for your car and have had no luck.

Anyone have a schematic they can post up of the power window circuit for a 1995?

Churchkey

Quick check for a stuck/bad window motor.
Key on engine off watch the interior lights while pressing the window switch. If the lights dim the motor is stuck if the interior lights do not change intensity you have an open circuit in the system.


Used car quick fix, works for tired/stuck window motors.

Engine running = E system @ 14V.

Hold the window button in the up position & slam the door closed. May take several attempts to get the window up.

CVTLOPE

Hi Polo Vert
Would appreciate some guidance as regards disassembling the switch assembly.
I have had a good look at the unit, which resembles a large black plastic match box, with a wiring module attached. Looks like you have to get a fine screwdriver under some clips?, or something like that. Can't see any obvious screws to undo.
Thanks
CVT
PS - once opened is it easy to get around in there or are there springs that have to be caught before they take off?

antfarmer2

I sprayed my 94 switch with carb cleaner worked it back and forth blew it out with air then let dry over nite blew out again for good luck has worked for two years now. Not sure if good idea see what others say but worked for me.

CVTLOPE

I've got hold of a wiring diagram for 95 C4.
Want to pull the wires from the switch & jumper the LHS to bypass the driver's switch.
Can anyone tell me which 2 wires I should connect to get driver's side window back up?

Thanks
CVT

kg4fku

Here is the troubleshooting guide from the FSM.

kg4fku

To answer your question directly

Can anyone tell me which 2 wires I should connect to get driver's side window back up?

The answer is

"Momentarily connect a fused jumper from LH power side window motor conn term "B" to ground."

CVTLOPE

Thanks
I actually put the wrong diagram up. Later today I will put the wiring circuit diagram on here.
CVT

CVTLOPE

This is the circuit diagram I meant to post.
CVT

kg4fku

From what I can tell both the diagrams you posted are the same. Is there a difference?

CVTLOPE

Messy day yesterday.
I mistook your Diagnostics checklist as being from me, ilo the wiring diag. There is no difference in the wiring diagrams, just posted it twice in error.

Anyway, I have run a test lamp on 1st 2 items on Diagnostic Checklist,
(Backprobe D to Ground then C to Ground. Then D to C with switch up & down). In all cases lamp lit up.
This suggests Switch is ok. In which case there is not much point in trying to pull it apart to clean it, or I should do that anyway.??

Also, running a fused jumper from PW motor "Term B" to ground to to get window to go up - is the Test Light considered a 'fused jumper"?
If it shouldn't be used, can you point me to a source of fused jumpers?
Thanks
CVT

kg4fku

First question - should I take it apart anyway
Short answer - No. You stand a better chance breaking a working part that is expensive or impossible to replace.

Second question - Is a test light condidered a fused jumper.
Short answer - No. You will overload the test light and it will become a useless mass of plastic and wires.

Third question - can you point me to a source of fused jumpers
Short answer - see the linked video for how to build. Parts can be bought at any Wal-Mart or auto parts store.

https://www.youtube.com/watch?v=12h7E5colm4

CVTLOPE

Thanks for advice/ video link.
I can put one of those together.
CVT

CVTLOPE

I watched the video & its pretty straight forward.
He ran through the components required, including 2 fuses in fuse holders.
But he didn't give the fuse rating.
What rating should be used?
Thanks
CVT