Installing an Electric Brake Controller on a 2005-2008 Volkswagen Touareg or Porsche Cayenne

Technical Bulletin

SUBJECT/Summary: Installing a brake control on a 2005-2008 Volkswagen Touareg or Porsche Cayenne

PROBLEM: Difficulty installing a brake controller on a 2005-2008 Volkswagen Touareg or 2005-2008 Porsche Cayenne

SOLUTION: When installing a brake control on a 2005-2008 Volkswagen Touareg or Porsche Cayenne, using the factory brake control connector under the dash, you will need to obtain the connector housing and wire/terminal assembly in order to assemble the brake control harness. The 2 wire/terminal assemblies will have to be cut in half to produce 4 wire assemblies. The cavities on the connector housing are numbered and the harness can be assembled as shown below.

To locate the connector under the dash, you first have to remove the lower appearance panel. This will require removing 2 Torx head screws. The brake control connector will be to the left of the opening and wrapped in Gray foam.

NOTE: If installing a Prodigy or P3, you may experience an erratic display on the brake control. To avoid or correct this issue, do not connect the Red wire from the brake control to the connector above.

When installing a Prodigy or P3, you will need to obtain locally, a 12 volt normally open relay.

1. Connect the ground terminal (85) of the relay to a know good ground under the dash.
2. Connect the trigger terminal (86) of the relay to pin #3 of the brake control connector.
3. Connect the red wire from the brake control to the load terminal (87) of the relay.
4. Connect the source voltage terminal (30) to a 12 volt source, this wire should have a 5 amp fuse installed in-line.

NOTE: This bulletin applies to the following vehicles:

• 2005-2008 Volkswagen Touareg
• 2005-2008 Porsche Cayenne

Manufacturer: Tekonsha

Bulletin Date: January 21, 2009

Bulletin Number: TB0021