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Old 09-29-2010, 02:47 AM   #1
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Default aem wideband radio interference whine

I just recently installed a aem uego wideband in my car and now i have this whine coming from the speakers. my switched power source is coming from the blower motor power off the ignition harness and ground is under the kickpanel. Its not a very loud whine... and cannot be heard with the radio up a little bit or blower motor etc.... It also doesnt change with RPMs I have tryed multiple power sources and grounds still no luck. wondering if other people have had the same problem and maybe a fix would be a ground loop filter for the radio?
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Old 09-29-2010, 07:25 AM   #2
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You need a direct and solid body ground. As for power, I wouldn't tap into the large brown or orange wires under the ignition switch. Those supply almost everything in the car that'* ignition fed. Find a circuit that has almost nothing on it in the fuse box and tap into that. Or consider the power drop on the passenger side.
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Old 09-30-2010, 09:04 PM   #3
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well i used the power drop on the passanger side for my power and still not gone. I moved the ground several times , I even tryed grounding straight to the battery no difference): all my connections are good and soldered i hate crimp connectors lol. Any other ideas on how i can fix this issue?
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Old 09-30-2010, 09:25 PM   #4
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Bad plug wire !! Or a bad ground somewhere
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Old 09-30-2010, 10:24 PM   #5
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Alot of things can do this. Even Fuel pumps can affect low frequency radios. One common area to check is the antenna'* coax feedline is grounded properly both at the radio and where the mounting bracket touches the body. I have heard of grounding the trunk and hood to the body have helped with these radios as well.
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Old 09-30-2010, 11:09 PM   #6
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Well the problem isnt just with the radio its with the cd player and even my ipod. I did notice that when i hooked up the switched power to the power drop it got worse... so i was thinking of running + and - to the battery and then just wireing in a relay to turn it on and off think that may do it it would then get it away from all the car audio stuff
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Old 09-30-2010, 11:14 PM   #7
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If its in other equipment as well, i would check the grounding. Especially the main ground from the battery.
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Old 09-30-2010, 11:14 PM   #8
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What spark plugs/wires are using?
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Old 09-30-2010, 11:25 PM   #9
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I will check the battery ground tomorrow that would make sense. But y wouldnt it pose a problem before i installed the wideband? Just curious i have heard it is common with widebands and i forgot to mention it goes away when i shut the sterio off
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Old 09-30-2010, 11:37 PM   #10
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Along with Bill'* suggestion for a direct and solid body ground, you can use a ground loop isolator. Some are better than others, but if you get a good one it should pretty much eliminate the noise. Those gauges can really make some noise.
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