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Discussion Starter · #1 ·
1993 Audi 90 I noticed a buzzing sound which I thought was the driver's side dashboard speaker, but it would stop buzzing when I used turn signals. The buzzing got louder, so I traced it to the relay which is mounted under the dash to the left of the steering wheel. I replaced the relay with an off brand and it ticked rather than buzzed, decided maybe the switch was the issue. Took apart the hazard switch and cleaned it with electric motor contact cleaner, and sprayed the contact cleaner at the base of turn signal stalk as well. Replaced relay with OEM unit; worked flawlessly for about 20 minutes, then started buzzing again.
Any suggestions?
 
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