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Electrical system, general repair measures

CAUTION:
  • When disconnecting and reconnecting battery terminals, observe all applicable Notes and torque specifications, as well as instructions on performing OBD program and electrical system function checks as specified in → Battery, disconnecting and connecting .
  • Always refer to and heed CAUTION! and WARNING! texts associated with repair and/or removal and installation information in the article
  • Wiring harness and connector repairs must only be performed using VAS 1978 Wiring Harness Repair Kit VAS 1978 Instruction Manual.
  • Only the yellow repair cables and insulation tape supplied with VAS 1978 are to be used for wiring/connector repairs. The use of yellow repair wires and yellow insulation tape identifies that a repair has taken place VAS 1978 Instruction Manual.
  • Before beginning wiring and connector repairs, determine and rectify the cause of damage, E.g.: pinched between metal parts, malfunctioning electrical consumers, corrosion due to water ingress etc.
  • Avoid loosening or removing any individual ground connections (potential for corrosion).
  • When repairs are completed, always perform a functional check of the component or system. Where applicable, check and erase Diagnostic Trouble Codes (DTCs) and set basic settings where applicable → VAS 5051 / 5052  under Vehicle Diagnostic, Testing and Information System VAS 5051 / 5052, onnecting .
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