Page 1
Page 1 of 2Electrical Equipment
Stereo radio 'Gamma CC Bose' with CD changer, component layout
Front antenna amplifier, checking
Test conditions
● Battery OK
● Power window circuit breaker -S43- (in auxiliary relay panel I) OK
● 5 amp fuse on radio OK
● Use multimeter (Fluke 83 or equivalent) and connector test kit VW 1594 for all electrical tests
Always use appropriate wiring diagram when troubleshooting
‒ Remove right side A-pillar trim.
‒ Leave front antenna amplifier mounted (Ground (GND) connection).
Note:
FM signals are received by both front and rear window antennas.
‒ Refer to illustration 90-912 => page 91-29 for component callout references.
Checking front
antenna amplifier
power supply
‒ Disconnect
power supply
(B+) wire 4
connector
‒ Set multimeter
to milliamp
range
‒ Connect
multimeter
between two
halves of power
supply (B+) wire
4 connector
● • Test conditions
‒ Test steps
● • Set multimeter
(Fluke 83 or equivalent)
to volt range
‒ Connect multimeter
between power supply
connector and Ground
(GND)
‒ Switch radio ON
‒ Switch radio ON
Specified
reading
Approx.
12 V
Approx.
20 - 50
mA
Repairing malfunction
‒ Check wiring for open
circuit according to
wiring diagram, repair
as necessary
‒ Check wiring for open
circuit according to
wiring diagram, repair
as necessary or
‒ Replace front antenna
amplifier
If specified readings are obtained:
‒ Remove radio.
‒ Remove antenna cable from front antenna amplifier.
‒ Set multimeter (Fluke 83 or equivalent) to measuring resistance ( Ω ).
‒ Connect multimeter between radio end and amplifier end of front antenna cable.
Page 2
Page 2 of 2Electrical Equipment
● Center core: must be 0 ohms ( Ω ) (continuity)
● Braided shield: must be 0 ohms ( Ω ) (continuity)
If NOT:
‒ Replace antenna cable.
Note:
Foreign substances such as paint, primer and windshield adhesive may conduct electricity and cause an
unwanted connection between antenna and car body (GND) resulting in poor radio reception.
‒ Carefully remove any paint, primer or windshield adhesive from antenna connection on windshield.
‒ When installing windshield, ensure antenna connection remains clean.
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