Seat question

[gharold]

Hello,

I have a MY 2000 C2 Carrera that I am getting ready to sell. I have had racing seats that I removed after four years. When I bought the car I removed the stock seats and sold them. I have recently purchased a set of stock seats that I planned on installing. My question is how many different sets of stock seat varieties are there? It seems the wiring on the passenger side will match up but on the drivers side it does not seem to match at all. Are there seats that are not compatible? There are no heaters, they are just stock power seats. Thanks for any assistance.

[gharold]

Guys,

Some further info. My car originally had the partial power sport seats with the manual sliders. The seats I purchased are full power. I am trying to figure out if Porsche installed different harnesses in the car depending on seat option. I may just be missing some intermediate harness. The new drivers seat has a control box where the passenger seat does not.

Loren, Help!

[Loren]

Guys,

Some further info. My car originally had the partial power sport seats with the manual sliders. The seats I purchased are full power. I am trying to figure out if Porsche installed different harnesses in the car depending on seat option. I may just be missing some intermediate harness. The new drivers seat has a control box where the passenger seat does not.

Loren, Help!

Every Porsche has a custom wiring harness for the option the car had at delivery.

If you change the type of seats you will need to make modification to add the wiring. It an be done but it is a pain to run the new wiring.

[gharold]

Guys,

Some further info. My car originally had the partial power sport seats with the manual sliders. The seats I purchased are full power. I am trying to figure out if Porsche installed different harnesses in the car depending on seat option. I may just be missing some intermediate harness. The new drivers seat has a control box where the passenger seat does not.

Loren, Help!

Every Porsche has a custom wiring harness for the option the car had at delivery.

If you change the type of seats you will need to make modification to add the wiring. It an be done but it is a pain to run the new wiring.

Loren, Thank you. That is what I figured/was afraid of. I think I will try to find the right set of seats rather than mess with new wiring. Thanks again.

[Daiji]

Loren,

I currently have the full power seats on MY99 996. I just saw some partial power sport seats on e-bay which I am thinking about getting.

Based on your comments about Porsche having a custom wiring harness based on the seat option that came with the car, then these partial power sports seats will not work without modifying the harness. Is this correct?

Thanks

[Loren]

Loren,

I currently have the full power seats on MY99 996. I just saw some partial power sport seats on e-bay which I am thinking about getting.

Based on your comments about Porsche having a custom wiring harness based on the seat option that came with the car, then these partial power sports seats will not work without modifying the harness. Is this correct?

Thanks

Yes and no.

Since the partial power seats are a subset of the full power they might work but just have extra connectors. Or, the connectors might not match up at all.

Since I have not tried this perhaps someone that has can comment...

[Gator]

Daiji,

If you can do some basic wiring, you can get your drivers seat controls working (getting the memory and reverse mirror function is, on the other hand, a major effort). As you are trying to sell your car, you might find the power seats more appealing to the buyer.

The wiring work that I outline below is rather basic and completely reversable.

If you look at the seat control unit under the drivers seat front (appx 8 x 3 x 1 inch black box) you will see a number of cable connector points. These are numbered 1 through 10. Some have plugs in them, some do not. Mostly all of the connections should be full on the left (connections 1 through 5) and empty on the right (6 through 10).

Look for connection "6". It is smack in the middle. and should not have anything plugged into it. If you were to pull the unit out from the seat, you'd see a label above that: " Spannungs verzorgung". This is the key connection.

Looking at the control unit with connection 1 to your right, connection "6" has 8 terminals laid out like this:

- - _

- - _

- -

The first two columns of six terminals are small,perhaps an eighth of an inch wide. The third column has two terminals which are larger and are what I'd refer to as normally sized spade terminals.

These terminals are identified by Porsche as follows:

D3 C3 B2

D2 C2 B1

D1 C1

To get your seat controls working:

1. Apply 12+ volt power to connections B2 and C1

2. Apply ground to connection B1

You can obtain 12+ power from the main seat connector. Just splice into the large red wire.

In your car, ground wire is brown. You'll see all kinds of brown wire under the drivers seat that you can splice into. There is also a ground lug under the seat too.

You can obtain the larger and smaller spade lug connectors and wire from radio shack.

Let me know if you have any questions, enjoy.

GA

[RedPhantom]

First let me see, the post before this one by Gator was excellent. It took me well over a week to find it, and was exactly what I was looking for, and it was well explained. I really hope it moves to the DIY forum under mods, because I know others have to be looking for this too. However I'm still at a roadblock.

I am currently undertaking the task of swapping Supple Leather Seats from a Boxster into my 996. The passenger seat hooked up fine, but the driver seat has the memory controlled exactly as you describe above. I tried running power to B2 and C1, and Grounding out B1, however I was unsuccessful with getting power to the motors and the switches. I have the wiring diagram from 996TT seats that Loren posted in another thread, and it says that C3 also gets a brown wire, which I suspect is another ground. Grounding C3 out while keeping the others intact still didn't help. I know that C2 is a 12v Switched wire, and that on the diagram it calls for a Black/Orange wire. I had the sport seats before with power recline and up/down, but there was no Black/Orange wire on the stack harness for the 12v switched. I guess my questions are as follows.

1) The Boxster Supple Leather Power Seats have the same memory control module as the 996TT seats, but does that mean they still wire the same way?

2) If they do wire the same way, shouldn't I be able to move the seats regardless of having the 12v Switched hooked up?

3) If the 12v Switched does need to be hooked up, any ideas where I might splice into one, or do I need to run it to the ignition, or fuse box? I suspect I could go read a V1 install since they generally end up in fuses, and run off of 12v Switch, right?

4) If I tear out the rest of my hair due to this crazy seat, does Rogaine really work?

I Hope this thread isn't too dead for someone to notice it.

[Cloudsurfer]

I added full power seats to a car that came with partial power seats. As long as the full power seats you purchased have the memory controller on them, I can help you wire them up. You won't have memory functionality, but all adjustments will work.

[RedPhantom]

Yeah it has the memory control box on the seat. I read one of your posts before too, I think it was over on the 986forums. Any information you could send my way would be great. I've even managed to get a hold of the harness from the car itself as well. Did you end wiring up the motors individually, or did you just put power to something on the memory control box?

[Puddinhead]

I have spent a week searching on the WWW for clues how to wire my newly obtained 2004 996 TT seats. The latter has the dreaded memory fucntion and is full power and no heat. My car is a 1996 C4S which has full power and no-heat seats.

The passenger side is no problem.

But the driver side is problematic as the memory ECU is inhibiting the installation of the 996 TT seat. I followed all the above suggestions to no avail.

Each of the seat motors (three of them) work fine if directly powered from my bench battery.

I can even get the lumbar function to work (if directly powered. BTW, where the the lumbar pump ?

I have read that if I were to obtain non-memory 996 seat switches that I could just bypass the seat ECU altogether and wire the non-memory switches to the seat motors. However, who would order a full power 996 seat system minus the memory option ?

Thanks,

Patrick

[Cobra64]

I'm in the process of wiring up electric 911 Turbo seats (not sure what year but everything pictured above looks the same). They have no heaters - just the 8 way controls (2 levers). Passenger side was easy - just two wires. I found on another forum that the wiring was a bit different for the Power Supply socket (#6). They had +12VDC going to C3 rather than C1. It then had GND going to C1. C2 was the same being switched +12VDC which I assumed would be the Accessories. I've tried this wiring out I found on the other forum and it worked OK. After switching power off to C2, it gave a number of seconds where you could still operate the seats (useful for when you have just switched the car off). Note that the seat would not operate again until I switched C2 back on after the time-out period had elapsed.

I saw a picture somewhere else where they had two wires coming out of D2 (orange/blue wire) & D1(brown/green wire). Would these be for the memory programming/recall functions ? I would love to be able to activate the memory function but perhaps it needs to talk to the memory switch circuitry panel on the door to work properly - I don't have one of these. I assume there would be nothing easy like just wiring up a simple push button switch somewhere where you could just memorize a single driver ? Anyone done/tried this ? Are D2 & D1 the key to this ? Does anyone have a wiring diagram to trace these lines that they could share ?

Edited January 6, 2013 by Cobra64