Ls 400
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Driver School Candidate
Joined: Jan 2013
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From: Kentucky
The noise started when my voltage regulator was going out sence then I have replaced the alternator and fixxed that issue but still get the electrical humming sound at 40mph any ideals?
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Did it hum prior of just recently with this issue? Is there aftermarket audio equipment installed? Is the audio system on when this occurs? Checking the grounds to the audio gear would be my suggestion..
Alternately I would suspect a tire wear issue but a hum may also be a drive line/tranny noise.
Did it hum prior of just recently with this issue? Is there aftermarket audio equipment installed? Is the audio system on when this occurs? Checking the grounds to the audio gear would be my suggestion..
Alternately I would suspect a tire wear issue but a hum may also be a drive line/tranny noise.
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Driver School Candidate
Joined: Jan 2013
Posts: 7
Likes: 0
From: Kentucky
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No aftermarket radio, speakers, or sub all original. The humming started when the voltage regulator and alternator was going out didnt make it before hand. Anything else regulates the voltage in the car other than those? Also got brand new battery. Also have brand new tires all around were put on last summer.Also tried turning off everything when the noise started air,radio,lights still made sound hear it really good when inside the cab with windows up and everything off.
Last edited by Neoice; Jan 5, 2013 at 12:56 PM.
Lexus Champion
Joined: Dec 2011
Posts: 4,078
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From: Birmingham, AL
if the radio is off, even an electrical hum wouldn't be audible
my vote is something like a wheel out of balance, a wheel bearing, an idler bearing or other pulley or bearing driven by the engine.
The only other thing that comes to mind is the speedo making noise.
my vote is something like a wheel out of balance, a wheel bearing, an idler bearing or other pulley or bearing driven by the engine.
The only other thing that comes to mind is the speedo making noise.
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