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Bavarian Soundwerks' Mobile Electronics Forum
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Old 03-09-2004, 09:25 AM   #1
JustinB181
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Question FM Reception is poor after install

I installed an amp and sub and now the FM reception has degraded. I may try running the power wire a different way, but that is the only idea i have. Does anyone else have a solution that has experienced this?

I assume its because of the interference from the amp. Its mounted below the rear deck.

Thanks for the help
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Old 03-09-2004, 11:10 AM   #2
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If you still have the factory head unit, maybe the antenna wire was disconnected either in the back or at the radio during installation? If you have no AM, then this may be the case.
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Old 03-09-2004, 12:47 PM   #3
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Hmm.. where is the antenna wire located? The factory radio did not come out all the install was done at the back, i still have the factory radio.
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Old 03-09-2004, 03:11 PM   #4
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Anyone know what wire in the rear of the car the radio antenna is? Or how i could have messedit up? I don't care about AM just want my FM back to normal
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Old 03-09-2004, 03:13 PM   #5
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whoever did the install must have either disconnected or loosely connected the antenna in the rear. if you still have your stock head unit and stock antenna, an amp and sub should not interfere with reception whatsoever.
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Old 03-09-2004, 03:31 PM   #6
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The reason why I asked about AM, is that if you don't have any AM at all, then it is most likely an antenna problem. If you do have AM, then it is probably a tuner problem.
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Old 03-09-2004, 03:52 PM   #7
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I did the install my self and only worked in the trunk. If I hit anything it would be in the trunk, Is there an antenna wire in the trunk that I may have hit???
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Old 03-09-2004, 03:53 PM   #8
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no my AM is not that good nor has it ever been good, but the FM was very strong. Now after the install and I only worked in the trunk the FM is now weaker, I still get the stations most of them but they are have static in them now. Could I have hit something working in the trunk?????
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Old 03-09-2004, 03:59 PM   #9
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I did take out the factory amp and cut the harness off, that may have done something but I am not sure what.

I used the harness and wired everything through that. And the extra wires the red/greed and the brown I just put a seal off connector on so it wouldn't touch anything. I do not know how i could have messed anything up since did not leave the trunk.
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Old 03-09-2004, 04:22 PM   #10
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umh, sounds familiar.

Is it noise, like slightly pour reception?
Do you get the same sound while playing a CD?
What type of amp are you using?
Did you use any type of converter, or does your amp accept high level inputs?
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Old 03-09-2004, 05:26 PM   #11
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yes pour reception on some stations but other stations that used to come in great now i can't get, no CD is fine, JL Audio 500/5 is the amp i am using,

No converter and yes it accepts high level inputs. Playing a CD sounds fine just the radio is now getting poor reception.. very frustrating
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Old 03-09-2004, 06:08 PM   #12
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someone wired there fm to the AM attenna for better reception
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Old 03-09-2004, 06:37 PM   #13
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JustinB181, well, guess you are better off than me then. I've got noise all the time. Pretty sure a lot of it has to do with my converter. Haven't had time to mess with it. Good Luck.
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Old 03-10-2004, 12:07 AM   #14
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I just want to get the FM working right, where do i find the antenna wires what color are they? I want to check them to make sure i didn't pull them out while installing
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Old 03-10-2004, 01:31 PM   #15
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I still have had no luck, does anyone have an idea how to fix my poor FM reception? I don't think i did anything to the antenna, i did remove the oem amp and cut the factory harnesses off to wire up my JL audio amp but thats it.
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Old 03-10-2004, 10:30 PM   #16
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JustinB181, I am having the same problem.... did you get DDE's installed recently by any chance? After my install, my radio stations that use to come in perfect have static in them but the CD plays perfect. Please help us folks!
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Old 03-11-2004, 01:32 AM   #17
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keep us informed if you get it fixed!
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Old 03-11-2004, 02:13 AM   #18
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Justin I have the same problem and have for awhile now. I had my HK subs removed and I have a JL 500/1 amp installed in my trunk under the deck in it's place. I'm using factory HU with line convertor. AM reception is perfect so its not my antenae. When i turn the amp off the FM reception is back to excellent, when the amp is turned on, FM reception is horrible. I can't even get some stations that are perfect with it off. CDs play perfect with no noise at all. Someone help me and justin please
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Old 03-11-2004, 12:28 PM   #19
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I am in the same position as all of you, i removed my OEM amp so I can not isolate it to the fact it is my new amp as i have the 500/5 and it is powering my whole car. It is VERY frustrating and I want to get it fixed. My AM never worked very well but my FM was always perfect even could pick up weak signals from out of town stations. Maybe everyone post what they have tried and then go from there.?????
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Old 03-11-2004, 01:50 PM   #20
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did you get DDE's installed by any chance?? does your cd player say TP or PTY?
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