slow240sx Posted April 3, 2011 Report Share Posted April 3, 2011 ii am getting a very bad alternator whine. It started after I put battery in the back and redid system wiring. Car was always quiet before. I've ran 2 extra grounds from battery to chassis with no help. Changed all rcas with no help. Amps r grounded directly to battery. Made 2 new grounds to headunit, didn't help. New 18g power wire to headunit. Ran hu power directly to distribution block. Motor has factory plus 2 grounds from alt to chassis and engine to chassis. Nothing has helped at all. Any other suggestions? Quote 99 GMC Suburban 2 Death Penalty 21" 2 Crescendo BC2000 Boston GT-42 Amp 6 Selenium 6w4p 4 Crescendo tweets Hi output cs144 alt Audiocontrol Epic-160 Pioneer DVD head unit Link to comment Share on other sites More sharing options...
splzx3 Posted April 3, 2011 Report Share Posted April 3, 2011 alt can be going bad Quote ________________________________________________________________________ deepsilencer, on 22 Aug 2011 - 17:32, said: splzx3, on 22 Aug 2011 - 17:27, said: i had my fun on one of his videos...till he blocked me then i got my mother into it lol after her he closed the comments xD lol your mom is a G! WTF, I never thought I'd have a conversation about cross dressers and trans-genders on a car audio forum. Link to comment Share on other sites More sharing options...
slow240sx Posted April 3, 2011 Author Report Share Posted April 3, 2011 ii have noticed alt output is only 13.8 @ alt when last month it was 14.2 Quote 99 GMC Suburban 2 Death Penalty 21" 2 Crescendo BC2000 Boston GT-42 Amp 6 Selenium 6w4p 4 Crescendo tweets Hi output cs144 alt Audiocontrol Epic-160 Pioneer DVD head unit Link to comment Share on other sites More sharing options...
bigp_on_the_beat Posted April 3, 2011 Report Share Posted April 3, 2011 I have that same problem and people told me my alt was going bad also. Im putting too much stress on the little guy. Soon to be R.i.p. stock 70amp alt lol Quote No car at the moment. New system: 2 Skar Audio VVX-12s Crescendo bc2000d Carquest NGT battery (back) Deka battery (front) Link to comment Share on other sites More sharing options...
slow240sx Posted April 4, 2011 Author Report Share Posted April 4, 2011 Went to local alt rebuilder & he tested it. Says its fine, putting out 85 amps & diode good. Quote 99 GMC Suburban 2 Death Penalty 21" 2 Crescendo BC2000 Boston GT-42 Amp 6 Selenium 6w4p 4 Crescendo tweets Hi output cs144 alt Audiocontrol Epic-160 Pioneer DVD head unit Link to comment Share on other sites More sharing options...
Tarball Posted April 4, 2011 Report Share Posted April 4, 2011 ii am getting a very bad alternator whine. It started after I put battery in the back and redid system wiring. Car was always quiet before. I've ran 2 extra grounds from battery to chassis with no help. Changed all rcas with no help. Amps r grounded directly to battery. Made 2 new grounds to headunit, didn't help. New 18g power wire to headunit. Ran hu power directly to distribution block. Motor has factory plus 2 grounds from alt to chassis and engine to chassis. Nothing has helped at all. Any other suggestions? have you done Big 3 ? Quote CURRENT SYSTEM: Alternator: Stock alt on mids/highs Isolated DC Power 270 SP - Charging @ 16.8v Batteries: (2) XS D1400s Power Cable: Double Runs of 1/0 KNU Kolossus Fleks Headunit: 80-PRS Sub Amp: DC 5.0k Subwoofers: 2 RE MT 15s /PSI dual .7ohm recones Subwoofer Enclosure: 9.1cubes @ 32hz - brutal. Mids & Highs Amp: CT125.4 Active Components: Mids RE XXX 6.5c Highs - 3 RE XXX tweeters per side(A pillar) Noise Control: Damplifier Pro all over the cab. Build Log If you do business with me please leave feedback here: FEEDBACK THREAD Highest Legal Score: 151.0 db Highest Musical 30 Second Average: 151.6 db Link to comment Share on other sites More sharing options...
D-train-13k Posted April 4, 2011 Report Share Posted April 4, 2011 could be the alternator bearing on the pulley Quote The IrishmanCheck out my build hereXL 4th order wall build logIn Progress:alpine cda HU4th order Bandpass2xl 15's1- ab 400.1 (gonna be two hopefully)4- Crescendo 8's2- xts crecendo supertweeters 2 sq super tweetsMb quart 4.125Mechman 270a alt1- xs D27003- xs XP3000 4- odessey pc1700seller feed back threadhttp://www.stevemeadedesigns.com/board/topic/136418-d-train-13k/ Link to comment Share on other sites More sharing options...
slow240sx Posted April 5, 2011 Author Report Share Posted April 5, 2011 ii am getting a very bad alternator whine. It started after I put battery in the back and redid system wiring. Car was always quiet before. I've ran 2 extra grounds from battery to chassis with no help. Changed all rcas with no help. Amps r grounded directly to battery. Made 2 new grounds to headunit, didn't help. New 18g power wire to headunit. Ran hu power directly to distribution block. Motor has factory plus 2 grounds from alt to chassis and engine to chassis. Nothing has helped at all. Any other suggestions? have you done Big 3 ? Quote 99 GMC Suburban 2 Death Penalty 21" 2 Crescendo BC2000 Boston GT-42 Amp 6 Selenium 6w4p 4 Crescendo tweets Hi output cs144 alt Audiocontrol Epic-160 Pioneer DVD head unit Link to comment Share on other sites More sharing options...
slow240sx Posted April 5, 2011 Author Report Share Posted April 5, 2011 Yes. I posted I upgraded all grounds. Got a 2/0 from alt to distro block. A pair of 2/0 engine to frame grounds. Battery is in back, has a pair of 2/0 ground wires going to seperate locations in hatch area. I even ran new power and rca wires outside of car for testing and it didn't helpp at all. I've prolly installed 125+ systems in 15 years and I've never had a noise problem this bad that I can't fix. Quote 99 GMC Suburban 2 Death Penalty 21" 2 Crescendo BC2000 Boston GT-42 Amp 6 Selenium 6w4p 4 Crescendo tweets Hi output cs144 alt Audiocontrol Epic-160 Pioneer DVD head unit Link to comment Share on other sites More sharing options...
SR20DAZE Posted April 5, 2011 Report Share Posted April 5, 2011 (edited) Im not sure but have you cleaned your ground, like sanded off of paint? Maybe rcas are to close to power and ground wires? Idk if that might help or not. Posible headunit or amp? Im puzzled as much as you are Edited April 5, 2011 by sr20daze Quote Hahah damn cody She ain't that sexy. I wouldn't even let her blow me. Those 10 pounds of make up would end up all over my crotch. you dont find dubstep, dubstep finds you hu: Pioneer MVH - P8300BT mids: Alpine sps-600 all four corners highs: Addictive Audio ECST25A,Memphis PR tweeters back sub: 15 inch crossfire bmf box: 4 cubes at 38 hz amp: Rockford Fosgate Power 1000 25 To Life 140.7 on a non sealed trunk car with a five channel so far (old sub audiobahn aw1505q) Build Log http://www.stevemead...ima-56k-beware/ Feedback http://www.stevemead...s-bfd-feedback/ Link to comment Share on other sites More sharing options...
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