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.
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.
Checking front
antenna amplifier
power supply
●
• Test conditions
‒
Test steps
Specified
reading
Repairing malfunction
‒
Disconnect
power supply
(B+) wire 4
connector
●
• Set multimeter
(Fluke 83 or equivalent)
to volt range
‒
Connect multimeter
between power supply
connector and Ground
(GND)
‒
Switch radio ON
Approx.
12 V
‒
Check wiring for open
circuit according to
wiring diagram, repair
as necessary
‒
Set multimeter
to milliamp
range
‒
Connect
multimeter
between two
halves of power
supply (B+) wire
4 connector
‒
Switch radio ON
Approx.
20 - 50
mA
‒
Check wiring for open
circuit according to
wiring diagram, repair
as necessary or
‒
Replace front antenna
amplifier
Page 1 of 2
Electrical Equipment
4/1/2009
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