Buzzing Type Noise When I Shut the Car
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Joined: Jul 2006
Posts: 66
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From: Scottsdale Arizona
Buzzing Type Noise When Lights Go Down
This has happened probably 2 of the past 4 times that I've shut the car off. It's a buzzing type sound that lasts maybe 5-6 seconds when I turn the car off, and it sounds like it's coming from the back right of the engine just beyond where the passenger's legs would be, but I couldn't swear to it. Other than that the car hasn't done anything out of the ordinary, and I haven't had any other problems with it. Any ideas as to what it could possibly be? Thanks in advance.
Last edited by BGDDYKWL; Jul 30, 2007 at 05:08 AM.
Burning Brakes
Joined: Oct 2004
Posts: 792
Likes: 19
From: ME
does it do it when you rev the exhaust? My exhaust would buzz when I got my car, and I removed the exhaust and found that there is a metal bracket above the catalytic converters that broke off, I welded it back on and no more rattle/buzz from the exhaust.
Something like that, or does it sound like it could be an electrical noise?
Something like that, or does it sound like it could be an electrical noise?
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
I would pull the passengers foot well toe board out and when you shut doen the car listen to the relays in that area. The BCM, Theft Deterrent Relay and the Column Lock relays are all in that area. I can hear the relay click in that area on my 02. Thats most likely what yopur hearing. If there buzzing, there may be an issue. Narrow down the noise to a componet and I would also check your DTC's to see if theres a DTC set in the DIC.
Here is a link on how to read your codes:
This is the absolute best C5 Diagnostic Trouble Code (DTC) web site!!!
http://www.corvettedoctor.com/Code_Main.html
http://www.corvettedoctor.com/index.html
www.corvettedoctor.com
Go to “technical data base” and then to “Corvette ECM Computer Codes”. Then select your year car. Read the instructions and then scroll down to the "READ MORE" window to view the code definitions.\
Here is another very good site:
http://www.obd-codes.com/trouble_cod...d-ii-codes.php
Make sure to include the H or C suffix!!
I would clear all the codes and see what new ones pop up!
BC
Here is a link on how to read your codes:
This is the absolute best C5 Diagnostic Trouble Code (DTC) web site!!!
http://www.corvettedoctor.com/Code_Main.html
http://www.corvettedoctor.com/index.html
www.corvettedoctor.com
Go to “technical data base” and then to “Corvette ECM Computer Codes”. Then select your year car. Read the instructions and then scroll down to the "READ MORE" window to view the code definitions.\
Here is another very good site:
http://www.obd-codes.com/trouble_cod...d-ii-codes.php
Make sure to include the H or C suffix!!
I would clear all the codes and see what new ones pop up!
BC
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Joined: Jul 2006
Posts: 66
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From: Scottsdale Arizona
Thanks for the info.
The closest thing I could describe the noise to is when you first turn on an air compressor (like a smaller one you'd keep in your garage). It's not quite that loud, but it's that type of noise. Kind of reminds me of a sound I used to get on my Chevelle when a component of the power door lock broke, which prevented the motor from moving the button. The motor would still try, but because this other component broke (I assume that's why) all you'd hear is like a grind/buzz noise.
The closest thing I could describe the noise to is when you first turn on an air compressor (like a smaller one you'd keep in your garage). It's not quite that loud, but it's that type of noise. Kind of reminds me of a sound I used to get on my Chevelle when a component of the power door lock broke, which prevented the motor from moving the button. The motor would still try, but because this other component broke (I assume that's why) all you'd hear is like a grind/buzz noise.
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Joined: Jul 2006
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From: Scottsdale Arizona
Good news (sort of). Got an update. I've determined that this buzzing noise comes immediately after the headlights retract, and lasts for a few seconds. It even makes the noise when the car is still running. For instance, the lights will turn on automatically because the car is in the garage, then they will retract once I pull it out into the sun, and immediately after they do I'll get the loud buzz for a few seconds. That might help in terms of narrowing down what the problem might be. Thanks.
Burning Brakes
Joined: Jan 2006
Posts: 1,170
Likes: 27
From: Magnolia Greens NC
just a thought....
Good news (sort of). Got an update. I've determined that this buzzing noise comes immediately after the headlights retract, and lasts for a few seconds. It even makes the noise when the car is still running. For instance, the lights will turn on automatically because the car is in the garage, then they will retract once I pull it out into the sun, and immediately after they do I'll get the loud buzz for a few seconds. That might help in terms of narrowing down what the problem might be. Thanks.
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Thread Starter
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Joined: Jul 2006
Posts: 66
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From: Scottsdale Arizona
Took my car in and apparently it was the headlight motor. And from what I've read the problem specifically was that the plastic gear was worn down. Might've been able to just switch out the gear with a brass one, but they suggested swapping the entire motor, and I didn't really feel like hassling with it so that was that. $400+ later and now my fingers are crossed that the other headlight motor doesn't go next.
