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 And Plug Connectors

CAUTION:
- Disconnect the battery Ground strap before working on the electrical system.
- Before starting a repair, it is important to identify the cause of damage (e.g. sharp edges on body panels, malfunctioning electrical components, corrosion, etc.).
- Repairs may not be performed on wiring associated with the airbag system or on shielded leads (such as wiring for speed senders or knock sensors).
- Additional information (e.g. for removing and installing the components) is listed in the relevant booklet of the Repair instructions).
- Only use yellow wires for repairs to wiring harnesses.
- A yellow wire or a section of wiring wrapped with yellow insulating tape always indicates a previous repair.
- Check the function of the components or system affected after every repair; if necessary, check DTC memory and reset systems to the basic setting.