S4 Quattro Wagon V8-4.2L (BHF) (2008)
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Wiring Harness: Removal and Replacement
Wiring Harness and Connector Repairs, General Information
Wiring Harnesses and Connectors
Special tools, testers and auxiliary items required
‹› Wiring Harness Repair Kit (VAS 1978) with
‹› Upgrade kit (VAS 1978/50)
‹› or Wiring Harness Repair Set (VAS 1978A)
‹› The Upgrade Kit (VAS 1978/50) is required to bring the "old" Wiring Harness Repair Kit ( VAS 1978) up to the new standard of the Wiring
Harness Repair Set (VAS 1978A).
CAUTION!
‹› Wiring harness and socket repairs may only be carried out with the Wiring Harness Repair Kit (VAS 1978) or Wiring Harness
Repair Set (VAS 1978A).
‹› Observe the country-specific requirements.
‹› Usage of the Wiring Harness Repair Kit (VAS 1978 ) or Wiring Harness Repair Set (VAS 1978A) is described extensively in the accompanying
usage instructions.
‹› Repairs on open circuits and faulty connectors are also explained using examples.
Wiring Harness and Connector Repairs, General Information
‹› Observe general notes for repairs on the vehicle electrical system => [ Vehicle Electrical System, General Information ].
‹› Not all of the wire cross sections contained in the vehicle are in the Wiring Harness Repair Kit (VAS 1978) or Wiring Harness Repair Set (VAS
1978A). If the required wire cross-section is not present, the next greater cross-section must be used.
‹› For repairs on vehicle electrical system, soldering is not permitted.
‹› Do not repair crimp connectors. If necessary, lay a wire parallel to the faulty wire.
‹› After crimping, crimp connections must be heat-shrunk using hot air gun to prevent moisture penetration.
‹› Shielded wires, such as RPM sensors and knock sensors, may not be repaired. If faulty, the entire harness must be replaced.
‹› Exclusive use is to be made of yellow wires for wiring harness repairs.
‹› Wiring harness repairs should not be made again in the wrapping on the vehicle-specific wiring harness.
‹› Mark repaired areas using yellow adhesive tape.
