OBC Hack Help - 986 Forum - The Community for Porsche Boxster & Cayman Owners

vheidenr · 05-08-2007, 05:53 AM

Hello folks. I own a 2003 "S". This weekend I installed the OBC Hack using a switch as opposed to a stalk. I used a Heated Seat switch (as I had one handy for some reason). Anyway, after a little bit of trouble shooting, I was able to get the OBC display to function properly. The only problem that I now have is that the computer stays on after I've shut the car down, locked the car and removed the key from the ignition. All else seems to function properly with this one exception. Does anyone have any ideas what might be wrong? My initial thought is that maybe the heated seat switch is not appropriate for this hack as it is a 2 stage switch. Otherwise, it might be a problem with my wiring. The little red light in the heated switch stays on at all times to....could this be a problem with my ground?

Any ideas would be truly appreciated. Thanks so much in advance for the troubleshooting help.

Vince

Thumper · 05-09-2007, 10:01 AM

I do think your problem is directly attributed to the choice of switches. You may need to turn the OBC off at the switch, just like you would if you had turned on the heated seats. It's worth a try. Otherwise, I'd pick a different style switch like the key switch that's either on or off.

MNBoxster · 05-09-2007, 10:20 AM

Hi,

The Heat Seater Switch is the wrong type. The Seat Heater switch is a DPDT (Double Pole, Double Throw) MOM-ON-OFF-MOM On to accomodate the 2 Heat Settings. What you need is a SPST (Single Pole, Single Throw) ON-OFF switch such as a TC, Lock/Unlock, Conv. Top, etc.

Why don't you just add the 4th Stalk because you won't be able to do resets with a single switch, only scroll.

I bought an entire 4-stalk unit from LA Dismantlers for $100. It was a pristine 4-stalk unit from a 996 (same-same, except the 996 has Auto Cruise Control) and they sent it completely assembled w/ Trim Pieces.

I removed the 4th Stalk (it just screws to the other three - the only one which does and not available from Porsche separately), added to my existing 3-stalk, swapped the escutcheons (3-stalk to 4-stalk) and sold the resultant 996 3-stalk piece on ebay for $135 + S/H - got my switch for FREE and netted $35 on the deal, enough to pay for the VW Motec Connectors and Wiring Harness, just to give you an idea. Hope this helps...

Happy Motoring!... Jim'99

vheidenr · 05-10-2007, 09:24 AM

I switched the switch and everything is working perfectly now. Thanks for the help. Maybe in the future I will opt for the 4th stalk. I'm not that strong at wiring projects and the install is somewhat intimidating to me.

spongebob · 05-10-2007, 11:56 AM

Does anyone know a place where I can have the OBC turned on in the San Diego area whithout loosing an arm. The last place I visited asked for $180

Tool Pants · 05-10-2007, 01:12 PM

I would do it for you if you were in San Jose.

For others. There is a list being started. http://www.renntech.org/forums/index.php?showtopic=13779

MNBoxster · 05-10-2007, 02:22 PM

Quote:

Originally Posted by spongebob

Does anyone know a place where I can have the OBC turned on in the San Diego area whithout loosing an arm. The last place I visited asked for $180

Hi,

Without telling them you plan on doing the OBC Hack, take it to a Dealer and ask them to give you the Temperature display. Many will do this as a courtesy, or include it gratis with other service.

They want to Wet Their Beak at every opportunity, so if you tell them you want to do the OBC Hack, they will want their taste...

Happy Motoring!... Jim'99