I just bought a 987 that got a very small amount of water in it. Just enough to fry the rear body control module under the seat. What I will describe here is on a 987 (2005
Boxster S
) but should in many ways be applicable to
986
's and earlier models too.
I had to get to the module under the seat, but the seat was almost all the way back and there was no possible way to get to the rear bolts to remove the seat. What I did was remove the front bolts and wedge something under the loose front of both sliders to get the seat as high up as possible.
My car has heated and memory electric seats, and as such has a black plastic seat memory module strapped to the underside of the seat cushion on the drivers side.
I took out the Phillips head mounting screw toward the center of the seat. The outboard one is impossible to remove with the seat in the car due to its location. Once I took out the screw I was able to swivel the box on it's remaining screw toward the center of the car. Once I did that I was able to remove the plugs on the back of the seat memory module box.
The plug you're looking for is the grey one.
All the + and - leads of the various seat motors go DIRECTLY to this plug. Apply power to the correct wire pairs in the plug and if the motor is workable, it WILL run. I took my 12v battery charger, and as advised by someone else on one of the forums, I took solid strand 18ga thermostat wire and tapped the ends somewhat flat with a hammer to semi-simulate the spade type connections that normally do in the plug. Don't go crazy with this, just flat enough to give the connector something to connect to. I connected the red and black wire to the appropriate alligator clip on the battery charger.
Here are the appropriate wire pairs in the plug:
- For the motor that controls forward/back movement of the seat - blue/green wire and blue/black wire.
- For the motor that controls the front of the seat going up and down - white/green wire and white/black wire.
- For the motor that controls the rear of the seat going up and down - yellow/black wire and yellow/green wire.
- For the motor that controls the seat back recline function - grey/green wire and grey/grey/black wire.
I plugged the flattened ends off the wires I "created" into the appropriate terminals on the plug opposite the correctly colored wires and turned on the battery charger. Nothing. I tapped the motor with the wooden handle of a hammer and PRESTO, it started moving. WRONG DIRECTION! I simply reversed the wires; I put the positive wire where I had the negative wire, and the negative wire in the terminal of the plug where I had the positive one, and PERFECT! The seat ran forward. I ran it forward until the rear bolts were accessible, took out the bolts and removed the seat. Now I was finally able to access the rear body module and the seat memory module underneath the seat.
I hope someone down the road finds this helpful, and thanks to all who so generously gave their advice.
Good work. I have one issue I think is related to the rear body control module, the rear trunk lid light , I believe it is connected somehow to that module, but do not have a schematic. Do you have any other wire diagrams that may have it shown. i have a 987 V2
I have a complete set of wiring diagrams for the
987.1
. I'm not sure of they're the same as for a
987.2
. I don't know how to attach the file to a posting on the forum. Email me and I'll email them to you. Hopefully it helps you.
Doug
Hi Doug,
I have a water damaged 2006
porsche cayman
. I found this post of yours from 2018 regarding how to remove the seats when no power is getting to them. I followed all the steps and it was a life saver!
I saw you also mentioned you had the full wiring specs of the
987.1
. I would be eternally grateful if I could get a copy? I have found other copies online but many appear to be unreadable!
Either way, much appreciated for the advice on the seat!
Best Regards,
Fraser Dawson.
