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Engine Noise On Stereo

Old 07-18-2005, 06:33 AM
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Default Engine Noise On Stereo

Installed 2 speakers on the flybirdge and hear a high pitched sound from the engine. Not sure if this existed before or is related to the new speakers but I hear the sound on the inside speakers as well.
Everything sounds great with the engine off.

Anyone else have this problem? How did you fix it?
Old 07-18-2005, 06:39 AM
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Default Re: Engine Noise On Stereo

Put resistor plugs in your engine if you don't already have them.
Old 07-18-2005, 09:25 AM
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Default RE: Engine Noise On Stereo

You should check to make sure that the noise is not coming through
the antenae/tuner. Put a tape/cd and see if you still have noise and:

If yes, install a filter on the power input.

If no, install a sheilded car antaenea in a place away from other wiring.

JP
Old 07-18-2005, 10:13 PM
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Default Re: Engine Noise On Stereo

I have the noise on all inputs.

I never noticed it until I installed the speakers on the flybridge and actually listened while the engine was running. Picked up an Automotive Electrical Noise Filter at Radio Shack today for 10 bucks. Once it is installed I will post the results.
Old 07-18-2005, 10:20 PM
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Default Re: Engine Noise On Stereo

had the same thing - was a bad ground - make sure the power going to yur amp/head unit is the same guage as the ground wire...also and RCA jacks from any head units to amp have got to be high quality and shielded....

I replaced my ground wire and ran it straight to the batt post and the system was whine free....
Old 07-19-2005, 09:52 AM
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Default Re: Engine Noise On Stereo

Glen E - 7/18/2005 10:20 PM

had the same thing - was a bad ground - make sure the power going to yur amp/head unit is the same guage as the ground wire...also and RCA jacks from any head units to amp have got to be high quality and shielded....

I replaced my ground wire and ran it straight to the batt post and the system was whine free....
The problem you are describing is likely a "ground loop". In my days as an
installer working through college, it was the most common noise cause. Its
more common in Cars because the frame can be part of the loop. For example,
if someone came in with noise on a dash unit only (no amp), the first thing I
would try was to simply unhook the antenae. The dash unit is grounded in
the dash and the antenae is grounded at its location on the body. If the noise
goes away, the solution is to simply cut the ground to dash unit and let it
get a ground through the antenae. Noise gone.

If you have an Amp you could have a ground loop.You can tell if you have a
gnd loop on the amp by simply disconnecting the RCA from either side and
observing if the noise goes away. If so, you have a ground loop. It can be fixed
as decribed by running everything staight to the battery or easier by installing a
"ground loop isolator" in the RCA that connect the stereo to the AMP.
WM has ground loop isolators.

JP

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