Electrical system, general repair measures

CAUTION:

Always refer to and heed CAUTION! and WARNING! texts associated with repair and/or removal and installation information in the articles .
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. Refer to VAS 1978 Instruction Manual.
Before beginning wiring and connector repairs, determine and rectify the cause of damage, Eg.: 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 setting. Refer to 01 ON BOARD DIAGNOSTIC (OBD) for 1.8 LITER 4-CYL. 5V TURBO FUEL INJECTION & IGNITION, ENGINE CODE(S): AWD, 01 ON BOARD DIAGNOSTIC (OBD) for 1.8 LITER 4-CYL. 5V TURBO FUEL INJECTION IGNITION, ENGINE CODE(S): AWW, AWP, 01 ON BOARD DIAGNOSTIC (OBD) for 1.9 LITER 4-CYL. 2V TDI FUEL INJECTION GLOW PLUG, ENGINE CODE ALH, FROM MY 2002, 01 ON BOARD DIAGNOSTIC (OBD) for 1.9 LITER 4-CYL. 2V TDI FUEL INJECTION GLOW PLUG, ENGINE CODE: ALH, MY 1999-2001, 01 ON BOARD DIAGNOSTIC (OBD) for 2.8 LITER VR6 2V FUEL INJECTION IGNITION and 01 ON BOARD DIAGNOSTIC (OBD) for 2.8 LITER VR6 4V FUEL INJECTION IGNITION. or use VAS 5051 tester.