Alternator whine
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Tomzman
- SE Member
- Posts: 21
- Joined: Wed May 08, 2013 7:38 am
- Year and Trim: 2001 Pontiac Bonneville SE
Alternator whine
I've installed an aftermarket amp in my 2001 bonneville and came up with a pretty bad alternator whine. I've tried separating the RCAs and power wires, different grounding points, and ground loop isolators. I'm frankly running out of ideas. Has anyone installed an aftermarket amp and correctly diagnosed the whine issue? Any other ideas to try? Thanks for all the help.
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J Wikoff
- Administrator
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- Year and Trim: 1992 SSE
2009 G8 GT - Location: Central Illinois
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Re: Alternator whine
When I had whine, I was using line output converters. My amp has speaker level inputs, so I tried those and the whine went away.
WHITE WHINE - 1992 SSE Supercharged 236.26 ci (.040 Over) 15.090 at 90.2 MPH on old engine w/ slipping trans & melted O2 sensor - Gen 3 M62 and matching TB, Gen 2 Pully, Zillamotorsports Ported LIM, YT 1.72 Roller Rockers, SII FPR & Injectors, Hypertech Thermomaster chip w/ 160 Thermo, TransGo Shift Kit, Infinity/Pioneer Speakers & a 10" Alpine Type R Sub, all the watts, 140 amp Alternator, Ricepipe CAI w/ heatshield, Pilot Angel Eye Foglights, Clear Corners, '02 17" Chrome Bent 5's, Magnaflow F-Body Muffler and Hi-flo Cat, Ceramic Coated Ported Exhaust Manifolds, Fan Override, Monroe Reflex struts, red calipers
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Tomzman
- SE Member
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- Joined: Wed May 08, 2013 7:38 am
- Year and Trim: 2001 Pontiac Bonneville SE
Re: Alternator whine
Yea that's where I probably should include the detail where I am using an aftermarket kenwood receiver and am running RCAs off the back of that to my amp... I know if I unplug the RCAs off the back of the amp that the whine does disappear. I am using the stock harness for the ground on my HU, so I may try running a ground cable from my HU to where I have my amp grounded...
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nos4blood70
- Certified Bonneville Nut
- Posts: 9522
- Joined: Mon May 10, 2010 6:11 pm
- Year and Trim: 2003 SLE
- Location: Chicago, IL
Re: Alternator whine
I am using a LOC and I have no alternator whine.
-Car Guy Carl
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
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Tomzman
- SE Member
- Posts: 21
- Joined: Wed May 08, 2013 7:38 am
- Year and Trim: 2001 Pontiac Bonneville SE
Re: Alternator whine
LOC?
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Tomzman
- SE Member
- Posts: 21
- Joined: Wed May 08, 2013 7:38 am
- Year and Trim: 2001 Pontiac Bonneville SE
Re: Alternator whine
The antenna... It was grounding out the HU, creating the ground loop. 
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nos4blood70
- Certified Bonneville Nut
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- Joined: Mon May 10, 2010 6:11 pm
- Year and Trim: 2003 SLE
- Location: Chicago, IL
Re: Alternator whine
Line Out converter! And I'm glad you found your solution. 
-Car Guy Carl
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles
"Penelope" - 2003 SLE - 250k Miles
"Sydney" - 2000 Honda S2000 - 101k miles