Jump to content

Server Lease Renewal/Software Licenses

Our yearly server lease, software licenses, as well as hardware operating costs, ARE due Dec 6th, 2021. Our current donations have fallen far short of the funds we need to renew. Please remember the RennTech.org community is Member supported so please consider a donation to help...  THANK YOU!

Welcome to RennTech.org Community, Guest

There are many great features available to you once you register at RennTech.org
You are free to view posts here, but you must log in to reply to existing posts, or to start your own new topic. Like most online communities, there are costs involved to maintain a site like this - so we encourage our members to donate. All donations go to the costs operating and maintaining this site. We prefer that guests take part in our community and we offer a lot in return to those willing to join our corner of the Porsche world. This site is 99 percent member supported (less than 1 percent comes from advertising) - so please consider an annual donation to keep this site running.

Here are some of the features available - once you register at RennTech.org

  • View Classified Ads
  • DIY Tutorials
  • Porsche TSB Listings (limited)
  • VIN Decoder
  • Special Offers
  • OBD II P-Codes
  • Paint Codes
  • Registry
  • Videos System
  • View Reviews
  • and get rid of this welcome message

It takes just a few minutes to register, and it's FREE

Contributing Members also get these additional benefits:
(you become a Contributing Member by donating money to the operation of this site)

  • No ads - advertisements are removed
  • Access the Contributors Only Forum
  • Contributing Members Only Downloads
  • Send attachments with PMs
  • All image/file storage limits are substantially increased for all Contributing Members
  • Option Codes Lookup
  • VIN Option Lookups (limited)

Wiring Diagram Help - Roll Bar ECU


Recommended Posts

Can someone point me to an online source for a wiring diagram that would include the roll bar ECU?  My '04 996 C2 Cab has a white wire wandering from back to front and I now see it is an extension of a green/white wire from the ECU.  I have no idea where it terminates at the front - haven't been able to find it.

 

Here is the area I am looking for:

 

post-101474-0-82403100-1461025265_thumb.

Edited by rockhouse66
Link to comment
Share on other sites

I am just trying to figure out this stray white wire.  It is hot when the ignition is on (maybe all the time).  And this green/white wire must have a purpose - yes?

 

I am basing what I think this box is on the part number which is printed on it:

 

post-101474-0-90965500-1461028143_thumb.

Link to comment
Share on other sites

I can't see a green/white wire on the wiring diagram going to the roof control module.  Could it be green/yellow?  If so, the connection at the control unit end is shown as "Button Open" so I expect someone has hacked in to it for some aftermarket device.  Unsurprisingly, the green/yellow wire goes forward to the convertible top button.

Edited by Richard Hamilton
Link to comment
Share on other sites

I am (or was) 100% sure that this white wire was added when the PO had a XM unit installed.  I was going to just remove it but it was hot when the ignition was on so I thought I better wait until I trace it's origin.  Now I know that it is not just spliced into an existing wire, it is a replacement for an existing wire.  So now I am trying to figure out which wire got replaced so I know what to do with this thing.  One more picture below.  I don't think it is green/yellow as there is a green/yellow nearby...?

 

post-101474-0-53065800-1461064776_thumb.

Edited by rockhouse66
Link to comment
Share on other sites

I'll try to get a better look, but maybe green/gray?  BTW, everything seems to work OK with the top.   I thought that when closing the top with the key that the windows should also close and they don't, but the owners manual suggests that the window closing is not part of the key closing process.

 

I guess I could disconnect it and see what doesn't work?  Sounds a little risky though - knowing that strange things can confuse the computer.

Link to comment
Share on other sites

OK, so this spliced in white wire should go to the dash mounted open/close switch and control the close?

-------------------------

Yes.  The GN/GY and GN/YE wires are switched to earth to signal the control unit.

 

Pin A4 has a brown wire attached which goes to a ground point.  A3 & A5 are for illumination.

 

post-4000-0-98994600-1461141803_thumb.jp

Edited by Richard Hamilton
Link to comment
Share on other sites

Just to close this out, I removed the horseshoe trim piece and found a short piece of green/grey wire from the power top switch spliced to the other end of the white wire that is spliced in back at the ECU.  Mystery solved...well, sort of.  Can't imagine what would require replacement of that complete wire from front to back.

 

Thanks for all the assistance and support on this exploration.  I could not have done it without RennTech!

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.