Static Noise From Speakers
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Seasoned HDF Member
Joined: Oct 2007
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From: Nevada
Static Noise From Speakers
I recently bought a 1999 Ultra Classic. The stereo makes a static noise through the speakers. The noise gets worse when RPMs increase. When the motor is turned off, the static goes away and the stereo sounds fine.
The bike has an H-D Enhanced Sound System Amp (#77179-01). When I jiggle the wiring harness where it connects to the amp, I can replicate the static. I unplugged the connector and sprayed it with contact cleaner, but this didn't help. Is there a way to bypass the amp so I can make sure it’s not the culprit?
The motor has Screamin' Eagle spark plug wires. Are these resistor wires? Can they cause electrical interference with the stereo or amp?
The bike is super clean and all stock with 41k miles. I bought it at an estate sale hosted by an auction company. The only history I know is based on some dealer service receipts I found in a saddle bag. The receipts identify new tires, cam chain tensioners, and cam bearings.
I haven’t had time to open up the fairing and check wiring connections. Any idea what might be causing the static?
The bike has an H-D Enhanced Sound System Amp (#77179-01). When I jiggle the wiring harness where it connects to the amp, I can replicate the static. I unplugged the connector and sprayed it with contact cleaner, but this didn't help. Is there a way to bypass the amp so I can make sure it’s not the culprit?
The motor has Screamin' Eagle spark plug wires. Are these resistor wires? Can they cause electrical interference with the stereo or amp?
The bike is super clean and all stock with 41k miles. I bought it at an estate sale hosted by an auction company. The only history I know is based on some dealer service receipts I found in a saddle bag. The receipts identify new tires, cam chain tensioners, and cam bearings.
I haven’t had time to open up the fairing and check wiring connections. Any idea what might be causing the static?
Last edited by Geoff; Jun 27, 2018 at 11:19 AM.
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From: Manitowoc county
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From: Indianapolis IN.
I recently bought a 1999 Ultra Classic. The stereo makes a static noise through the speakers. The noise gets worse when RPMs increase. When the motor is turned off, the static goes away and the stereo sounds fine.
The bike has an H-D Enhanced Sound System Amp (#77179-01). When I jiggle the wiring harness where it connects to the amp, I can replicate the static. I unplugged the connector and sprayed it with contact cleaner, but this didn't help. Is there a way to bypass the amp so I can make sure it’s not the culprit?
The motor has Screamin' Eagle spark plug wires. Are these resistor wires? Can they cause electrical interference with the stereo or amp?
The bike is super clean and all stock with 41k miles. I bought it at an estate sale hosted by an auction company. The only history I know is based on some dealer service receipts I found in a saddle bag. The receipts identify new tires, cam chain tensioners, and cam bearings.
I haven’t had time to open up the fairing and check wiring connections. Any idea what might be causing the static?
The bike has an H-D Enhanced Sound System Amp (#77179-01). When I jiggle the wiring harness where it connects to the amp, I can replicate the static. I unplugged the connector and sprayed it with contact cleaner, but this didn't help. Is there a way to bypass the amp so I can make sure it’s not the culprit?
The motor has Screamin' Eagle spark plug wires. Are these resistor wires? Can they cause electrical interference with the stereo or amp?
The bike is super clean and all stock with 41k miles. I bought it at an estate sale hosted by an auction company. The only history I know is based on some dealer service receipts I found in a saddle bag. The receipts identify new tires, cam chain tensioners, and cam bearings.
I haven’t had time to open up the fairing and check wiring connections. Any idea what might be causing the static?
Thread Starter
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Seasoned HDF Member
Joined: Oct 2007
Posts: 10,946
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From: Nevada
Amp is an H-D Enhanced Sound System #77179-01. The radio (and amp) on a '99 Ultra use a wiring harness. There are no RCA connectors.
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Seasoned HDF Member
Joined: Oct 2007
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From: Nevada
Stock headlight, no LED.
I ordered a ground loop isolator from Cruthfield. When I open up the fairing to install it, I'm going to first run a ground wire from the radio to the battery (long test wire) to determine if I have a bad ground.
My my bike has Screamin Eagle spark plug wires. They're suppression type wires. Can SE wires cause electrical interference?
The SE wires came on the bike. I don't know if there was static before they were installed. I bought the bike from an auction, so I don't know it's history.
I ordered a ground loop isolator from Cruthfield. When I open up the fairing to install it, I'm going to first run a ground wire from the radio to the battery (long test wire) to determine if I have a bad ground.
My my bike has Screamin Eagle spark plug wires. They're suppression type wires. Can SE wires cause electrical interference?
The SE wires came on the bike. I don't know if there was static before they were installed. I bought the bike from an auction, so I don't know it's history.
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From: Indianapolis IN.
****** that stuff out there brother and go with an aftermarket system.
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Seasoned HDF Member
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From: Nevada
Turns out the cause of static in my speakers was a bad amp--not a poor ground, interference from SE plug wires or other. I eliminated the amp and returned to the stock setup. While I had the outer fairing off the bike I installed a pair of Polk speakers. I don't listen to the stereo much, so stock is good enough for me.