Jetta L4-1.9L DSL Turbo (AAZ) (1997)
Radio/Stereo Noise Filter: Description and Operation
Stereo System, Electrical Interference Suppression
The majority of the electrical consumers/components in the vehicle are suppressed to ensure minimal electrical interference with radio reception.
On vehicles equipped from the factory with a radio or radio prep wiring, the following components are also suppressed:
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Coolant fan -V7-
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Windshield wiper motor -V-
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Rear window wiper motor-V12-
In addition, vehicles with a radio or radio prep wiring will have the following additional Ground (GND) connections:
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Ground (GND) strap from left wheel housing to hood
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Ground (GND) strap from ignition coil -N152- to engine cylinder block (vehicles with gasoline spark-ignition engine only)