Removing Wire Harness For Brake Booster

WARNING: This page is about a different car, the 2010 Porsche Cayenne, 2009 Porsche Cayenne, and 2008 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Installation Position Of Wire Harness For Brake Booster

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Ground strap
Connector for wiper motor
Air quality sensor connector
Connector for brake fluid reservoir
Brake booster connector
Way-sensor connector (brake assist)
Pressure sensor connector (brake assist)
Rubber sleeve

Remove cover on cable duct (above the pedals) -arrow- .

Fig 2: Removing Cover On Cable Duct
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Information

When cutting the wire harness for the brake booster, make sure there is enough length of cable left to join to the new lines.
Cut off wire harness for brake booster in area -a- (top right, next to the pedals).

Fig 3: Cutting Off And Expose Wire Harness For Brake Booster
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove fabric tape and tie-wraps in area -b- and expose the remaining lines.
Screw off ground strap -1- on the centre firewall.

Fig 4: Removing Ground Strap On Centre Firewall
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 4.1. Screw off the fastening nut on the centre firewall and remove the ground strap with the twist lock -arrow A- .
2. 4.2. Unclip wire harness at the retaining clip -arrow B- .
Pull off connector on brake fluid reservoir -4- .

Fig 5: Pulling Off Connector On Brake Fluid Reservoir
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 5.1. Release connector on brake fluid reservoir -arrow A- and pull it off -arrow B- .
Pull off connector on brake booster -5- .

Fig 6: Pulling Off Connector On Brake Booster
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 6.1. Release connector on brake booster using a suitable aid (e.g. angled piece of wire) -a- (-arrow A- ) and pull it off -arrow B- .
Pull off way-sensor connector (brake assist) -6- .

Fig 7: Pulling Off Way-Sensor Connector (Brake Assist)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 7.1. Release way-sensor connector (brake assist) using a suitable aid (e.g. angled piece of wire) -a- (-arrow A- ) and pull it off -arrow B- .
Pull off pressure sensor connector (brake assist) -7- .

Fig 8: Pulling Off Pressure Sensor Connector (Brake Assist)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 8.1. Release pressure sensor connector (brake assist) using a suitable aid (e.g. angled piece of wire) -a- (-arrow A- ) and pull it off -arrow B- .
Loosen wire harness on the centre firewall.
1. 9.1. Open retaining clips -arrows A- and remove the line -arrow B- .
2. 9.2. Open both holders (brake assist) -arrows C- and remove wire harness -arrow D- .
  
  Fig 9: Removing Wire Harness On Centre Firewall
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove rubber sleeve -8- on the centre firewall.

Fig 10: Removing Rubber Sleeve On Centre Firewall
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 10.1. Unclip wire harness for brake booster from the centre firewall at the retaining clip -arrow A- .
2. 10.2. Remove rubber sleeve on the centre firewall in direction of the engine compartment -arrow B- and remove wire harness for brake booster.