Troy Barnes

Doesn't have to be new, thought I'd ask the board to see if anyone has one sitting around unused before I cave and buy it new.
Although mine seems to have a different part # and schematic, not sure if it matters and the 928.615.126.00 will work as well as the 928.615.128.00
Possibly because mine is a non sunroof car?


Thanks

Troy Barnes

Hi guys,
I still would really like to find the correct relay #928.615.128.00
I've been jumpering for a long time with no central door looks but operating windows, thought I'd check again since the locks seem to be getting a bit sketchy now.
Can any of the vendors out there get the correct relay? #928.615.128.00

Thanks

soontobered84

Any of the main vendors can get you this relay. Just a call away.

Alan

I think both 928.615.128.00 or 928.615.126.00 are correct for your car (& any '85-'88) the sunroof makes no difference to function.

928.615.128.00 seems to be less available new today. The relay 928.615.126.00 has been superseeded to 928.615.126.02 - so look for that if you are looking for new - or look for used 928.615.128.00/928.615.126.00. Both relays have the same 40A rating.

Alan

ROG100

928 615 128 00/01 is for ROW cars - also has an effect on the locks and interior lights. We know this because a 928 615 126 00 does not work on a ROW car.
We tried the 126 00 in an 85 and had to use a 128 00/01 this weekend.
These were 16v Twin Dizzy ROW cars and not ROW 32v. Original Post states a 86.5 ROW which does not exist as only USA 32v are 86.5.
Sean can add the details.

928 615 126 02 is $47
928 615 128 01 is $83

Alan

Roger that is interesting, I don't see any obvious difference in the functions/connections... Can you explain what didn't work on the ROW car with the 918.615.126.00 installed.

Like to understand this so I can document it. It may be that the wiring diagrams don't show everything that is different between USA/ROW.

Do the pin labels and diagrams match between 128.00 & 126.00?

There are known functional USA/ROW differences - but I thought for this generation it only affected the active state:

USA (126) - relay turns on with accesssory position of ignition switch, relay turns off when door is opened (if ignition is off)

ROW (128) - relay turns on with accesssory position of ignition switch, relay turns off after door is opened (if ignition is off), but is temporarily on whenever a door is open

Alan

Troy Barnes

Roger, I actually spoke to you about this a few years ago, I can't remember precisely the conclusion we came to at the time, whether I could source it from Porsche or not at all.
Anyway the car is a 32 valve ROW imported from Japan to Canada and has many of what I thought were factory cross over pieces from S4 like the no trim H4s ... Also the VIN which I don't have on hand it lined up for 86.5 IIRC. (I'd actually like to run the VIN for factory options, I'll post later)...
It seems to me although my memory is foggy on this now I apologize, that I came to the conclusion I needed the 128 and not the 126 FWIW.

Found VIN on INS in wallet: WPOZZZ92ZGS849615

SeanR

I didn't see anything different on the WSM either so I had Roger order a brand new 126 00 thinking it would be fine. Wish I had taken pictures of the two side by side as the only difference was a squiggly line on the square, but the 126 00 wouldn't even operate the windows. I grabbed the 128 00/01 from Rogers '86 Euro and popped it in and it works perfectly. The car wouldn't lock both doors automatically either until I popped in the proper relay. Not sure what's different but the windows and locks are run though that relay.

ROG100

Troy only USA/Can 86 32v cars are defined 86 or 86.5. There was a VIN split half way through the 999 v 1000 where they added the S4 brakes and suspension.
All ROW 86 cars - either 16v or 32v had the S4 brakes and suspension.
So your car is a 1986 ROW 32v.

Troy Barnes

Thanks for that Roger, and essentially since I've owned the car I assumed it was an 86.5 because of all of the differences.l'll have to change my sig!
Calling for order

ROG100

Here are the two relays side by side.

Alan what do you see different from the wiring schematics?

I will experiment with both relays this weekend to see what works on which car.

Alan

Nothing shown makes any real difference... they seem to be functionally ~equivalent.

I do know they work a little differently as I previously described, basicially under what conditions they turn on and off - but it's a quite subtle difference and shouldn't affect any normal usage.

Alan

dr bob

The 128 01 adds a diode between the 30 (power always on) terminal to the little logic time-delay 'box', at least based on the drawing. I presume that gives you the extra key-off funcionality. Need to look at the surrounding circuitry to see what other changes go along with that change.


There are several relays that are generic except for little differences like this. Depending on how precise the timing needs to be, a little RC filter with a diode, transistor and a couple small resistors might get the same functionality, as an example. At some point when these go out to the NLA list, we'll need to start reverse-engineering the functionality to keep cars on the road.