Bora 1999 ➤ , Bora Variant 1999 ➤ , CC 2010 ➤ , Eos 2006 ➤ , Golf 199 ...
Electrical System, General Information - Edition 07.2010
♦ Observe the latest notes in the respective workshop manual
when carrying out repairs.
♦ Observe country-specific regulations.
♦ Always disconnect the battery earth strap before working on
the electrical system. Disconnecting the battery earth strap
(open circuit) provides a safe working environment for repairs
to the electrical system. The battery positive wire need only be
disconnected for removal of the battery.
♦ Before starting a repair, it is important to identify and rectify
the cause of damage (e.g. sharp edges on body panels, de‐
fective electrical components, corrosion, etc.).
♦ For additional information, e.g. removal and installation of in‐
dividual components, please refer to the relevant workshop
manual.
♦ Soldering is not permitted for repairs to vehicle wiring.
♦ Wiring harness and connector repairs to vehicle electrical sys‐
tem should be carried out using wiring harness repair set -VAS
1978 B- and previous versions only. Only use yellow wires
from wiring harness repair set -VAS 1978 B- .
♦ Wiring harness repairs may not be integrated in the vehicle's
own wiring harness and must be marked with the use of yellow
adhesive tape. This indicates a previous repair.
♦ Crimp connectors may never be repaired. If necessary, lay
wiring parallel to the defective wiring. After crimping, crimp
connectors must to be shrink fitted using the hot air blower in
order to prevent any ingress of moisture.
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♦ It is essential that the supplementary information is observed
regarding repairs to wiring harnesses in airbag and belt ten‐
sioner systems, fibre optic cables, CAN bus lines, aerial cables
2
and wiring with cross sections up to 0.35 mm ⇒ page 91 .
♦ Carry out a function test after every repair. It may be necessary
for the fault memory to be interrogated, erased and/or for the
systems to be reset.
♦ If possible, do not loosen any earth wires from the body (dan‐
ger of corrosion).
♦ Wiring harness repair set -VAS 1978 B- and previous versions
do not cover all wiring cross sections that occur in the vehicle.
If the required wiring cross section is not available, the next
largest one should be used.
♦ Screened wires must not be repaired. If damaged they must
be replaced complete.
♦ Heat resistant wiring can be found in various places in the ve‐
hicle, mainly in the engine compartment. Heat resistant wiring
can be identified by its slightly matt and softer insulation. To
repair these wires, only heat resistant wiring may be used.
2.4
Repairs to wiring harnesses
Note
Observe the general notes on repairs to the vehicle electrical
system ⇒ page 85 .
Notes on repairs to airbag and belt tensioner wiring ⇒ page 88
Notes on repairs to fibre optic cables ⇒ page 89
2. Repairing wiring harnesses and connectors
87
English 