buzzing noise every 20-30 seconds with car off?
Thread Starter
Junior Member
Joined: Jul 2004
Posts: 23
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buzzing noise every 20-30 seconds with car off?
My 1996 S500 Coupe has developed a new condition where every 20-30 seconds, I will hear a buzzing sound coming from the car for about 3 or 4 seconds.
To give you a sense of what it sounds like, when I first heard it from outside the car, I thought there was an ignition problem because it kind of sounded like the buzzer you get if you open the door with the key in the ignition or with the lights on ... but it sounds like a much more muted version of it.
Since I thought it was that, I sat in the car and waited for the sound and I was surprised that it doesn't seem to be coming from inside the car. It also doesn't seem to be the fuel pump since I can turn the key and hear that - the fuel pump sounds normal.
I also tried listening with the hood open ... it doesn't sound like it's coming from the top side of the motor but it does sound like it's coming from the front - and from the outside.
To be clear, this is happening with the car cold and not started for a few days ... and it still seems to happen if I start it up while it's running and then again, as well, when I turn the car off.
Is there any other pump, motor, or process that would cycle on every 20-30 seconds if it's failing that could be making the noise?
To give you a sense of what it sounds like, when I first heard it from outside the car, I thought there was an ignition problem because it kind of sounded like the buzzer you get if you open the door with the key in the ignition or with the lights on ... but it sounds like a much more muted version of it.
Since I thought it was that, I sat in the car and waited for the sound and I was surprised that it doesn't seem to be coming from inside the car. It also doesn't seem to be the fuel pump since I can turn the key and hear that - the fuel pump sounds normal.
I also tried listening with the hood open ... it doesn't sound like it's coming from the top side of the motor but it does sound like it's coming from the front - and from the outside.
To be clear, this is happening with the car cold and not started for a few days ... and it still seems to happen if I start it up while it's running and then again, as well, when I turn the car off.
Is there any other pump, motor, or process that would cycle on every 20-30 seconds if it's failing that could be making the noise?
Thread Starter
Junior Member
Joined: Jul 2004
Posts: 23
Likes: 0
by the way, it also doesn't sound like it's the pump under the rear passenger side seat and it doesn't at all sound like the pump in the trunk.
I also had the doors unlocked.
Any suggestions of things to check if I can get it on a lift in the next few days?
thank you!
I also had the doors unlocked.
Any suggestions of things to check if I can get it on a lift in the next few days?
thank you!
