Volkswagen Golf Service & Repair Manual: General notes concerning repairs to vehicle electrical system
Caution
| When batteries are disconnected and reconnected, the
procedure described in the workshop manual must be
strictly observed. |
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WARNING
| Some tools are equipped with a tool safety device.
This must be pushed over the tip of the tool after use
in order to protect the tip and prevent personal injury. |
|
| 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,
defective electrical components, corrosion, etc.). |
| For additional information, e.g. removal and installation of
individual components, please refer to the relevant workshop
manual. |
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| Soldering is not permitted for repairs to vehicle wiring. |
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| Wiring harness and connector repairs to vehicle electrical
system 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. |
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| Crimp connectors may never be repaired. If necessary, lay
wiring parallel to the defective wiring. After crimping, the
crimp connector has to be shrink fitted using the hot air blower
in order to prevent any ingress of moisture. |
| It is essential that the supplementary information is
observed regarding repairs to wiring harnesses in airbag and
belt tensioner systems, fibre optic cables, CAN bus lines,
aerial cables and wiring with cross sections up to 0.35 mm2
→ Chapter. |
| 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. |
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| If possible, do not loosen any earth wires from the body
(danger of corrosion). |
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| 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 can be repaired. Wiring for camera systems
are the exception. If damaged they must be replaced complete. |
| Heat resistant wiring can be found in various places in the
vehicle, 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. |
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Wiring harness repair set -VAS 1978- allows optimal repair
quality to be achieved in the area of vehicle electrics. Using
the tools, repairs to connectors and wiring ...
Other materials:
Removing and installing C-pillar trim, saloon
Note
Removal and installation are described for the left
vehicle side. Follow same instructions for the right side as
appropriate.
Special tools and workshop equipment
required
...
Performing maintenance test
WARNING
It is not permissible to test or charge batteries
whose colour indicator is light yellow. Do not
slave/jump start the vehicle!
Danger of explosion when checking and charging ...
Vibration, causes for vibration
Vibration can have a number of different causes. Vibration
can also be caused by tyre wear. Tyre wear caused by driving is
not always evenly spread across the entire running surface of
the tyre. This causes slight imbalances which affect the smooth
runni ...
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Wiring harness repair set -VAS 1978