Faint static when radio off and slight alternator noise when running. Stumped.
11-09-2017, 09:06 AM
#21
Senior Member
Alternator whine resolved. Bad subwoofer amp (Sound Ordnance). I pulled the fuse and that problem went away. Replaced with JL Audio JX500/1 using the same ground with no problems.
Now all that's left is some static that most people could probably live with.
To recap: Upgrading amp and speakers revealed alternator whine, static, and no crap, a radio station faintly playing in the background.
Installed sub and amp and regrounded to frame with no resolution.
Upgraded head unit and used PAC dash kit. Radio station went away, but now there was a raised floor noise when a USB device was attached.
Replaced head unit under warranty with no luck.
Found a loose factory ground terminal. That fixed the USB noise, but didn't take care of the alternator whine and static.
Pulled sub amp fuse and alternator whine went away. Replaced amp.
All that's left is some liveable hiss sound. But since I've went this far I might as well try to stamp it out as well. Upgrading power wires next.
This was supposed to an easy, one weekend upgrade. The only easy part was actually swapping dash parts into the PAC kit. I had originally thought this would be the worse bit. lol
Now all that's left is some static that most people could probably live with.
To recap: Upgrading amp and speakers revealed alternator whine, static, and no crap, a radio station faintly playing in the background.
Installed sub and amp and regrounded to frame with no resolution.
Upgraded head unit and used PAC dash kit. Radio station went away, but now there was a raised floor noise when a USB device was attached.
Replaced head unit under warranty with no luck.
Found a loose factory ground terminal. That fixed the USB noise, but didn't take care of the alternator whine and static.
Pulled sub amp fuse and alternator whine went away. Replaced amp.
All that's left is some liveable hiss sound. But since I've went this far I might as well try to stamp it out as well. Upgrading power wires next.
This was supposed to an easy, one weekend upgrade. The only easy part was actually swapping dash parts into the PAC kit. I had originally thought this would be the worse bit. lol
I went through all the cab/truck ground points and they were all good. I can't remember my ground readings but I did go through them with a DMM. I should probably try them again.
By your description I think our hiss is the same and livable as you said.
Could be our hearing is just better than the average.
02-17-2018, 02:35 PM
#23
Junior Member
Join Date: Mar 2015
Location: Oregon
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I don't have the static problem, but do have the faint radio sound issue in my 2017 F-150 amp/subwoofer when truck is off. Concerned it might run down the battery over time, but not inclined to troubleshoot it beyond checking the grounds.
06-25-2022, 07:27 AM
#24
Alternator whine resolved. Bad subwoofer amp (Sound Ordnance). I pulled the fuse and that problem went away. Replaced with JL Audio JX500/1 using the same ground with no problems.
Now all that's left is some static that most people could probably live with.
To recap: Upgrading amp and speakers revealed alternator whine, static, and no crap, a radio station faintly playing in the background.
Installed sub and amp and regrounded to frame with no resolution.
Upgraded head unit and used PAC dash kit. Radio station went away, but now there was a raised floor noise when a USB device was attached.
Replaced head unit under warranty with no luck.
Found a loose factory ground terminal. That fixed the USB noise, but didn't take care of the alternator whine and static.
Pulled sub amp fuse and alternator whine went away. Replaced amp.
All that's left is some liveable hiss sound. But since I've went this far I might as well try to stamp it out as well. Upgrading power wires next.
This was supposed to an easy, one weekend upgrade. The only easy part was actually swapping dash parts into the PAC kit. I had originally thought this would be the worse bit. lol
Now all that's left is some static that most people could probably live with.
To recap: Upgrading amp and speakers revealed alternator whine, static, and no crap, a radio station faintly playing in the background.
Installed sub and amp and regrounded to frame with no resolution.
Upgraded head unit and used PAC dash kit. Radio station went away, but now there was a raised floor noise when a USB device was attached.
Replaced head unit under warranty with no luck.
Found a loose factory ground terminal. That fixed the USB noise, but didn't take care of the alternator whine and static.
Pulled sub amp fuse and alternator whine went away. Replaced amp.
All that's left is some liveable hiss sound. But since I've went this far I might as well try to stamp it out as well. Upgrading power wires next.
This was supposed to an easy, one weekend upgrade. The only easy part was actually swapping dash parts into the PAC kit. I had originally thought this would be the worse bit. lol
I will check the ground lug at the fuse panel today.
Same story here, slight FM signal hiss bleeding through the factory radio, then becoming amplified by the additional inline amplifier.
Unplugging the orange Antenna wire makes a difference.
I honestly do think it’s just inherent noise from the factory radio that’s being amplified by the new inline amplifier.
My hiss is very faint and tolerable.
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