970949 Reworking Main Wire Harness
WM 970949 Reworking main wire harness
Tools
Preliminary work
1. Disconnect battery. => 2706IN Work instructions after disconnecting the battery
2. Remove cover under dashboard right. => 702219 Removing and installing cover under dashboard - section on "removing"
3. Remove front right side section trim. => 702419 Removing and installing front side section trim - section on "Removing"
4. Remove front right seat frame. => 720919 Removing and installing front seat frame - section on "Removing"
Reworking main wire harness
Rework main wire harness (connection points A and B) - side member area on the right
Overview of connection points - control units
Installation position for right side member connection point
1. Pull back carpeted floor and sound absorber slightly -A- in the front right footwell.
Pulling back carpeted floor and sound absorber
2. Lift carpeted floor -A- on the right side at the entrance and fold inward.
Folding carpeted floor inward.
3. Unclip cover for main wire harness -B- and open it.
4. Remove the four tie-wraps and expose main wire harness.
Removing tie-wrap at main wire harness
Information
Corrosion can be identified by leads that are tarnished or discoloured instead of bright.
5. Remove insulating tape from all connection points (between 4 and 8, depending on the vehicle equipment) and check connection points for corrosion.
5.1. Corrosion recognisable - continue with Step 6.
5.2. No corrosion recognisable - continue with Step 9.
Information
To avoid mixing up the lines, one of them should be crimped again after the other connection point.
Information
Allocation of lines - see wiring diagram.
6. Cut away one of the exposed connection points -A- with a side cutters and strip off insulation until no more corrosion can be seen. The leads must be bright and no longer tarnished or discoloured.
Cutting off connection points
Information
The greatest care must be used in the individual work steps for stripping insulation from, crimping, and shrinking/insulating the electric lines.
The procedure for stripping insulation from, crimping, and shrinking/insulating the electric lines must be complied with and observed. The procedures are described in detail in the Repair kit for Cayenne harnesses NR.155-2.
Crimping samples are to be prepared before beginning work.
7. Crimp stripped line ends of the connection point using crimping sleeves and the hand crimping pliers from the Repair kit for Cayenne harnesses NR.155-2.
8. Cut off all other corroded connection points, one after another, strip off the insulation and crimp them again.
9. Insulate all connection points with a suitable shrink-fit hose -A- and carefully shrink them using the hot-air blower with special nozzle (recommended accessories for the repair kit for harnesses) so that they are watertight.
Insulating connection points with shrink-fit hose
10. Route main wire harness and fasten with four new tie-wraps. Shorten tie-wraps.
Securing main wire harness
11. Close cover of main wire harness -B-.
Folding back the carpeted floor
12. Fold back carpeted floor -A- on the right side at the entrance.
13. If necessary after moisture leakage, place the vehicle in the drying cabin for 3 - 4 hours (overnight if necessary) at a temperature of approx 60°C.
14. Fold back carpeted floor and sound absorber -A- in the front right footwell.
Folding back carpeted floor and sound absorber
Subsequent work
1. Investigate the moisture leakage using the traces of water. Take into account the description "Sealing front panel". => 501451 Sealing front panel
2. Install front right seat frame. => 720919 Removing and installing front seat frame - section on "Installing"
3. Install front right side section trim. => 702419 Removing and installing front side-section trim panel - section on "Installing"
4. Install cover under right instrument panel. => 702219 Removing and installing trim under instrument panel - section on "Installing"
5. Carry out work instructions after disconnecting the battery. => 2706IN Work instructions after disconnecting the battery