OBC/Cruise Control upgrade

[Anker]

Did you check the bulb?

[Nik64]

The cluster as equipped with led no standard bulb, so I did not open it

[BER]

I finally completed the OBC and CC hacks to my '01 Boxster back in February.

I bought a used 4-switch stalk from Parts Heaven that was in excellent shape. I also purchased Pdwight's OBC harness which is "first class". I made my own wiring harness for the CC functions; followed the guide on Pelican which was a great help.

Finally activated everything with my Durametric Pro. Both the OBC and CC functions have been working fine ever since. They are great!

IMHO, these are two of the best upgrades available for Boxster's without OBC and/or Cruise Control.

[Pdwight]

I try to make every effort to make my harnesses the very best hand made product possible.

[BER]

IMHO, you have accomplished your goal!

Thanks for your first class OBC harness!

[PLP]

Originally Posted by pjq

2004 Boxster S
I finished my winter project of installing the 4 stalk controller so as to enable cruise and the OBC. I followed the directions as laid down in "101 Projects for your Porsche Boxster", "986 Bentley Service Manual" and the web site Renntech.org which has a wealth of information for this upgrade. Now I just have to get to an Indy Shop/Dealer to activate both through the computer.

I took my time for fear of breaking something and this took two days, no breaks. If I had to do it again probably 4-5hrs. My garage temperature was around 5 to 6 C so plastic parts aren't as pliable.
When removing the instrument cluster all the documentation tells you to lift straight up after removing the 2 screws behind the telephone speaker and the hazard flasher. They don't mention that there are 5 plastic tabs helping to hold the instrument cluster to the dash. Likewise with the Trim Ring around the steering column and the dash, it is secured on top with 2 screws and under the steering column there are 2 plastic tabs, lift straight straight up.

The condensed wire plan is;
2003-4 Boxster Cruise:
Plug C (Grey) on the Instrument Cluster Pin 17 - Stalk Connector Pin 1
Plug C (Grey) on the Instrument Cluster Pin 4 - Stalk Connector Pin 3
Plug C (Grey) on the Instrument Cluster Pin 1 - Stalk Connector Pin 4
Fuse B7 - Stalk Connector Pin 2
2003-4 Boxster OBC:
Plug C (Grey) on the Instrument Cluster Pin 23 - Stalk Connector Pin 2
Plug C (Grey) on the Instrument Cluster Pin 22 - Stalk Connector Pin 3
Plug C (Grey) on the Instrument Cluster Pin 21 - Stalk Connector Pin 4
Plug C (Grey) on the Instrument Cluster Pin 24 - Stalk Connector Pin 5
Earth (ground) - Stalk Connector Pin 1

so let me get this straight.
If one is to install the 4-stalk, some wires are "doubled", in other words, connected to same pins from the stalk, but different on the gray one (C plug).
Pin 1 is ground and goes to Pin 17
Pin 2 goes to Pin 23 and Fuse B7
Pin 3 goes to Pin 22 and Pin 4
Pin 4 goes to Pin 1 and 21
Pin 5 goes to Pin 24

Is that right?

Base 2003.
I hope to get clarification soon as I am in the middle of the project...

[PLP]

OK, never mind... I figured it out myself. I just needed a night of sleep.

Of course those are two different plugs. Somehow when I read initially the project it sounded to me like it is enough to get the 4-stalk and 5 wires, plus the plug.

Yes, that is true for the OBC. There was no plug to purchase for Cruise Control.

OBC has a 6-pin connector where only 5 are used.
CC has a 4-pin connector and all of them are utilised.

Therefore, if one wants to do both projects at the same time - you will need overall 9 wires and preferably 16 plugs (one is ground while the other goes to B7 fuse) .