Volks AutosSky Insurance
Results 1 to 4 of 4
  1. #1
    Reverse Gear

    Status
    Offline
    Join Date
    Jul 2013
    Location
    California - USA
    Posts
    4

    How to trick Car's Computer Into Trailer Attached Mode?

    2008 A4 B7 Avant

    Is there a way to activate the car's computer into tow mode when using a bypass relay for lighting? The computer has been enabled for towing, but by using the bypass relay instead of the dedicated Westfalia towbar wiring harness, the car won't know when a trailer is attached. The Westfalia wiring is still in place, but the trailer will be connected to the bypass electrical connector.

    Thoughts?

  2. # ADS
    ADS
    Join Date
    Always
    Location
    Global
    Posts
    Many
     
  3. #2
    NHN
    NHN's Avatar
    Modmetractor

    Status
    Offline
    Join Date
    Jan 2008
    Location
    Coding Something
    Posts
    27,129
    Usually the car is coded for the towbar module & the module itself sees a connection & thus tells the car what to do, but you don't have a module afaik that's connected to the cars network.

    OEM RETROFITS - CRUISE CONTROL - SAT NAV - BLUETOOTH - AMI - HEADLIGHT SYSTEMS

    PARKING SYSTEMS - DIAGNOSTICS - FAULT FINDING - BODYWORK - PAINTWORK

  4. #3
    Reverse Gear

    Status
    Offline
    Join Date
    Jul 2013
    Location
    California - USA
    Posts
    4
    Thanks very much for your response.

    I also have the dedicated Westfalia towbar wiring harness installed and have enabled the tow module in the computer by entering the code. Additional background on my scenario can be found here. Is there a crossover wire I could add to the Westfalia tow bar plug, or somewhere else, that activates tow mode as needed since everything else is in place and coded correctly?

    I seem to be the only person in the U.S. that has come across the issue with the Westfalia harness and/or is trying to leverage the towing capabilities of the A4 Avant via the computer (which I find hard to believe).

    Thanks!
    Last edited by MarkJ; 25th July 2013 at 20:01.

  5. #4
    NHN
    NHN's Avatar
    Modmetractor

    Status
    Offline
    Join Date
    Jan 2008
    Location
    Coding Something
    Posts
    27,129
    Unless the relay kit has a module that interfaces with the cars network, then its isn't going to happen, as the module connects to the cars network to tell it when something is plugged in, thus disables PDC & lights up on the dash aswell.

    I also cant imagine westfalia didn't think about the pdc side of things, unless the relay kit is specifically for cars without pdc.

    OEM RETROFITS - CRUISE CONTROL - SAT NAV - BLUETOOTH - AMI - HEADLIGHT SYSTEMS

    PARKING SYSTEMS - DIAGNOSTICS - FAULT FINDING - BODYWORK - PAINTWORK

 

 

Similar Threads

  1. How to display car speed on Air Con display?
    By turbodan in forum A3/S3 Forum (8L Chassis)
    Replies: 36
    Last Post: 21st April 2012, 22:01
  2. How did the b**tards get into my car?
    By elton121272 in forum A3/S3/Sportback (8P Chassis)
    Replies: 21
    Last Post: 29th June 2011, 13:07
  3. How To: Make a single din into a Double.
    By MiT in forum In-Car Entertainment
    Replies: 2
    Last Post: 10th July 2007, 17:49
  4. The Germans know how to store cars
    By Rev-head in forum General Chat
    Replies: 12
    Last Post: 23rd June 2006, 12:48
  5. How was your car made?
    By imported_CurryMilkShake in forum General Chat
    Replies: 3
    Last Post: 31st August 2005, 22:25

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO