Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Repair and Diagnosis: Service Precautions



Safety Precautions For Repairing Wiring Harnesses And Connectors

CAUTION:
- Wiring harness and connector repairs on the vehicle electrical system are only to be performed using wiring harness repair set VAS 1978 .
- Pay attention to the relevant regulations in the individual countries.
- Disconnecting the battery negative ( - ) terminal prevents accidents when working on electrical system. Disconnect battery. Audi A4 S4.
- Heed stickers on vehicle pointing out components with high voltage. Remaining voltage must be dissipated before commencing repair work.
- Before commencing repair work, always eliminate cause of damage, e.g. sharp body edges, malfunctioning electrical components, corrosion etc.
- Do not loosen ground straps on body if this can be avoided (danger of corrosion).