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Buzz from dash relay clicking 2015 GTC

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Old 04-18-2020, 06:32 AM
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Buzz from dash relay clicking 2015 GTC
I have a buzzing noise from the dash off idle and the relay clicks. Often times rapidly. I have bought chassis ears and determined the relay for the vacuum pump (based on wiring diagrams and wire colors). It looks like the ecu controls the vacuum pump. What tells the ecu to turn on the pump? I have a video of the sounds and will try to upload. It’s loud and besides being annoying I’m not sure if it’s damaging here is a link to the sound.
 
Last edited by corveight; 04-19-2020 at 09:13 AM. Reason: Add link to video clip
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Old 04-20-2020, 06:11 AM
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I have determined the buzzing is from the pump. Being mounted behind the left front wheel the sound is transmitted thru the firewall.
 
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Old 05-05-2020, 02:56 PM
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my car is 2008, bentley continental gt and it makes the same noise from the vacuum pump, but only when i press the brake, the relay no
 
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Old 05-05-2020, 02:59 PM
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the error in vcds
 
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Old 05-15-2020, 01:47 PM
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Are you getting the CEL?
 
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Old 05-19-2020, 06:03 AM
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No CEL.
 
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