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Both window motors suddenly not working - 928S 83.5
So I went for a short drive today, luckily in dry weather. Put my windows down & then five minutes later stopped the car & the window buttons were both suddenly unresponsive.
I've swapped the blue '21' 'window regulators, central door locking' fuse & no improvement.
I then thought it was the 'VI' 'Window Regulator' relay, so removed that to find that the central locking was then also not working! Refitting the 'VI' relay restored the central locking... Still no function from the side windows...
Does this problem sound familiar to anyone on the list?
Could it be the 'VI' relay? I'm a little confused by this as the 'VI' relay allowed the central locking to continue functioning...
I'm not familiar with the earlier cars (and didn't even know there was an '83.5) but based on your relay references it's not an S3 like mine so this will be general.
You said you
thought it was the 'VI' 'Window Regulator' relay, so removed that to find that the central locking was then also not working! Refitting the 'VI' relay restored the central locking... Still no function from the side windows...
In order to test the relay you would have to swap it with a known good one of the same type. I'm not sure what kind of relay this is, but the relay is the likely culprit here until you rule it out.
If it's listed for two different things, then there must be two electrical paths inside there (double relay, possibly sharing common and ground inside the cap, but split electrically for trigger and continuity/output). One could be good and the other NG or hanging.
You can't rule it out until you swap it out with a known good one of the same type though.
Is there another relay of that type in your car (or the type it should be)?
Maybe you can swap it with that one? (You're right, the relay diagram appears to just be a simple, one circuit deal, I guess it's just a switch to power both circuits further downstream. Not sure why they do that...
EDIT: EDIT again- I'm trying to follow the relay VI thing. What is your MY again? 83?
Can you see if you have another relay that matches this one?
My fuel pump fuse also failed just before Xmas & the soldered red cables you see there are what a local electrician did to to fix the problem. I'm really not sure why a new fuse was not used!
The blue fuse next to the red wires is the 'window regulators, central door locking' fuse, so I'm also wondering if that fix has messed with the fuse next to it.
you might drop the CE panel and check the input/ output of the fuses to the wires that are connected to the fuse holders.
its quite common for the input along to the top edge of the fuses,
to not come out the bottoms due to the wire connectors corroding at the fuse holder pin.
Stan he has much bigger problems than that showing here - is that a permanent jumper for the fuel pump relay? Can't tell from the picture, but is there a manual switch for it? That is a terrible idea no matter what, and that electrician should not be near your car - ever.
The window issue sounds most definitely like a relay or fuse issue - the way to tell is when both sides go out at the same time. Get the correct relay from one of the vendors who ship to Oz, and try that. Also, get wiring diagrams and begin the process of fixing your CE panel - it's a one day job at most.
Ed your correct,....it looks like possibly a new fuse holder was simply soldered into the CE panel ,BUT on closer inspection the lower solder joint appears to join with the blue fuse holder
Yeah, I'm seeing a pattern and depending on how much you are in the car, this could be the first time the specific set of circumstances came up since the fuel pump fuse 'fix' was implemented.
For me, the answer would be get all of the relays and fuses that are supposed to be there back where they belong. Each of these may have had things working temporarily, but the right stuff will eliminate the possibility that it was just working until the weakest link let go.
If I were on the side of the road in an emergency I might do something like you see there, but not long term.
On an '83 the window relay is a simple Bosch SPDT relay - you can buy a generic one at any auto store quite cheaply. The relay is controlled by the ignition (15) with ignition on the power windows are active, with ignition off the central locking is active - you need the relay in place for either of these to work.
It is likely the relay is the culprit. If you use a fused bridge between 30 & 87 on the relay socket you can test window operation - if good then - it was the relay. Or just buy another relay to test - you don't have any other compatible relays. If with the relay in place the central locka are always active (ignition on/off) - that also proves the rela is at fault.
For an early car fuse restoration is possible by refurbing the original hardware in almost all cases - this fix was unnecessary - I do assume there is an inline fuse holder there...
It probably doesn't use the same kind of fuses as the rest of the panel which is a bit problematic.
Thanks for all of the help so far guys. Much appreciated!
So I have sourced a generic relay (see back of packet specs pic) & that has restored the electric windows function! however the central locking is now inactive!? Does anyone know why this would now be the case???
In any case I will order the correct Porsche part tomorrow & replace the generic with that.
The next job will be to fix the butchered fuel pump fuse. Not exactly sure how I'll go about that. I'd imagine I need to replace the contacts in the board...
01-10-2015, 05:18 AM
Both window motors suddenly not working - 928S 83.5
