Need help!!!Radio Interference (Long read) - Road Glide Forums
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post #1 of 12 (permalink) Old 08-13-2013, 04:31 PM Thread Starter
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Need help!!!Radio Interference (Long read)

Hey Everyone! This is my first post...Let's make it a good one! I am in the Airforce and stationed in Georgia if anyone here is close! I'll start by saying that I have installed many car audio systems. Experience with the audio side is definitely not an issue. However this is my first harley and I am hoping just a quirk one of you have seen. This is going to get a bit long winded.. but I have tried many solutions and came up empty. I have spent hours searching the internet but can't find anything related. I read many good things about the hawg-wired set-up and decided to go ahead and purchased from Drago's

Bike: 2013 Road Glide Custom 600-ish miles

Mods: Screaming Eagle Intake, Rhinehart True Duals, HD Daymakers, Zipper Thundermax ECM

Audio system: Hawg-Wired sixpack, JVC El Kameleon radio. Biketronics Retro Radio kit.

The Problem:
I am getting some pretty hefty interference from somewhere I believe. The interference only happens in "Run" position. (Bike off) When I turn it to "Accessory" it goes away. The interference i would describe as a high pitched whine. It isnt constant. Sometimes it will go away for 30 seconds or so, but it always comes back. Imagine the noise the fuel pump would make at a way higher pitch. Also, also a slight hum and slight noise with brakes/blinkers.

The Bike Background:
I had the LED's and exhaust and intake put on at the dealer when I bought the bike brand new. Also I bought a PC5 and got the dealer to Dyno it. It all worked great minus some tuning issues. The bike would jerk every so often. (bad dyno I would say) I read here on the forum a lot of people liked the zipper Auto tune and decided to bite the bullet. It would save me some dyno monies later in life. First, I installed the sixpack as per the instruction manual. I installed the Biketronics unit aswell. Immediately it had some ground noise. The normal kind. The alternator whine kind. I tried many different grounds and nothing! We were riding to savannah the next day so I put everything back together and hooked the speakers straight to the radio....No interference at all. The sound wasnt great, but worked for the trip.

I called Hawg-wired and explained my situation and that I believed the Amp was an issue. He told me that he believed the amp was not the cause, but he kindly next-day aired ia new one to me anyways with return shipping for my old one. (EXTREMELY good customer service. It's rare I have a problem and like it... But it's comforting to know companies still have stand up people nowadays) After installing the new amp..I still had the same problem. He was right...the amp wasn't bad. Eventually I found a ground that it liked and *most* of the noise was gone. Then I put everything back together and the noise came back. (The regular interference noise)

About this time the zipper came in and I installed it since the bike was apart. I know I should have fixed the problem first, but really didnt think this would have any effect on my audio. After installation I am stuck with the noise that I described first. (humm/buzz, popping with brakes blinkers, really high pitched whine.) I have tried switching back to the regular ECM but still have noise somewhere.

*Interesting facts:
-I noticed moving the ECM around while still hooked up changes the pitch of the whine.
- I noticed that when I unplug the 02's from the ECM (Zipper) the noise GREATLY reduces.
- I noticed when I disconnect the RCA jacks the noises go away with everything still powered up.
- I sauter everything, no but connectors.
- The radio is not powered through the Biketronics unit. I ran a new power wire. It also has it's own ground not through the Biketronics unit.

Things I have tried:

- I have tried running/re-running/re-re-running/re-re-re-running the wires.
- I have tried running all kinds of grounds including straight to the battery. The grounds I have tried have been together, separate etc... every way I can think of.
-I have tried going to a thicker gauge wire... I had some 4 gauge laying around so ran a new power/ground with 4ga instead of the 10.
- I have tried a Brand new Deck.
- I have tried a Brand new Hawg-wired Amp.
- I have tried skipping the cross-overs.
- I have tried new RCA's
- I have tried narrowing the noise down by pulling fuses. None of them affected the noise.
- I have tried a ground loop isolater between the Amp and the Radio ( This was effective in reducing the noise quite a bit, but it is merely a band-aid and not a fix. Besides, the blinker popping is still present albeit quieter but still present.
- I have tried taking it to a Car Audio shop and they couldn't fix it. (All they did was do everything I had already done and told them didnt work.....oh and charge me $110 to fix nothing.. but thats a story for a different day)
- I have tried with and without the Daymakers to see if they were the problem.
- I have tried taking the wireless antenna that came with the kit off and putting the stock antenna back on..
- I have tried running new wires and disconnecting the Biketronics unit all together.

I guess I will have to try and get with zipper and see if they will try a new ECM. It's a longshot though because even with the stock ECM I still get noise.

Anyways, I think thats about all I got for now. Any fresh Ideas would be greatly appreciated. I think I am beginning to look too much into the box because I have been at this for a while.

If you need any more info just let me know. Thanks!

Last edited by grimyth; 08-13-2013 at 04:59 PM.
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post #2 of 12 (permalink) Old 08-13-2013, 10:46 PM
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Thumbs up HW Support

There is multiple reasons why you may have some noise being picked up and/or generated by "x" device(s). Floating grounds, loops, etc. Call me at the shop when you get a free few minutes tomorrow and we'll help track this down and eliminate it without the use of inferior converters, filters, or isolators. Fingers crossed.

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post #3 of 12 (permalink) Old 08-16-2013, 08:35 AM
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Grimyth, What was your outcome?

2012 RGC - Work in progress
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post #4 of 12 (permalink) Old 08-25-2013, 03:02 PM
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I'm having the same issue but I have biketronics amp and speaker. No led.
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post #5 of 12 (permalink) Old 08-25-2013, 06:53 PM
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In ur paragraphs about the Bikes Background,...
U said you had 'Normal' Ground Noise,....
There is not such a thing as "Normal Ground Noise".
I hope Justin got it figured out for ya.

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post #6 of 12 (permalink) Old 08-25-2013, 08:42 PM
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simplify by saying

ground loop isolation issue

my sony radio flips out or jumps ground, 6v spike

because it's been out in the rain several times

plus the stock radios are worse sometimes

2010 FLTRX- r o a d g l i d e

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post #7 of 12 (permalink) Old 02-24-2014, 10:01 AM
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Kind of late reply but if it helps someone. I took everything back apart and as a bone head move I should have know to grind the paint away on my front fairing support so I would have a good ground. Problem was eliminated,
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post #8 of 12 (permalink) Old 02-25-2014, 08:14 AM
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By chance to you have the in fairing antenna?
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post #9 of 12 (permalink) Old 02-26-2014, 07:14 PM
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Last edited by sblair; 02-26-2014 at 07:18 PM.
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post #10 of 12 (permalink) Old 02-26-2014, 07:44 PM
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Good to hear you finally found the problem. ....

Sent from my SPH-L710

2010 FLTRX With Plenty of extras, goes by the name "Hardeshia"
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