meade916 Posted March 8, 2010 Report Share Posted March 8, 2010 damn, i am baffled!! I am driving this big ass presidential 2009 Black burban rental while my truck is getting fixed......anyway, i look down and its at like 12v so i think, damn its not charging! wtf! Not anywhere NEAR the 14v thing on the gauge. So i shut it off, turn it back on, it charges.....for about a minute. Then it drops back down. Well im about to call Enterprise (rentals) and tell em it isnt charging but then i drive it to work this morning and with the headlights on, it charges fine. As soon as the sun hit and the auto-lights went off, it dropped to 12v again...... ok i have 4 alts in my personal ride, you would think i would know something LOL - i have no idea whats going on here! Anyone with a newer Hoe or Burb know about this?? Quote All SMD products + MORE available at my store here! https://wccaraudio.com/ Subscribe to My Youtube Channel! Over 1,000,000 subscribers strong! Turn on your notifications! http://www.youtube.com/meade916 Follow My Instagram! Daily live feeds from the shop, exclusive content way before it hits my Youtube channel...and little squares with photo's in them http://www.instagram.com/meade916 The Official SMD Facebook fan Page https://www.facebook.com/SteveMeadeDesigns/ Follow my Tweet (Twitter) http://www.Twitter.com/meade916 Link to comment Share on other sites More sharing options...
Decaf Posted March 8, 2010 Report Share Posted March 8, 2010 alt is shut off once batt is fully charged to 12.8 to conserve fuel iirc Quote Link to comment Share on other sites More sharing options...
IH8PunkRok Posted March 8, 2010 Report Share Posted March 8, 2010 alt is shut off once batt is fully charged to 12.8 to conserve fuel iirc how do they do that? thats going to extreme lengths to save fuel Quote -Matt2005 Dodge Magnum RTJVC KD-AVX1 2 PPI S580.2 Obsidian Audio ST1 Horn Tweeters PRV 8MB450s Audio Legion 3500.1D 2 RE MT 18s 360 ah LiFePO4 BatterySHCA 2/0 155.2 @ 29 hzKicker CVR 15's buildDD 3512e buildMini T-Line Build(6) 8s BuildNightshade 15s Wall BuildMagnum AB XFL 12s BuildNewest Magnum Build Link to comment Share on other sites More sharing options...
Decaf Posted March 8, 2010 Report Share Posted March 8, 2010 (edited) how do they do that? thats going to extreme lengths to save fuel google it, ull get plenty of answers "This vehicle is also equipped with a voltage reduction systems that reduces the drag on the alternator to increase mileage." Edited March 8, 2010 by Decaf Quote Link to comment Share on other sites More sharing options...
pervitizm Posted March 8, 2010 Report Share Posted March 8, 2010 Yup Decafe's right, the newer burbans/tahoe are programed to set the voltage back down to 12.8v when the battery is fully charged. I though my alt was bad after I had installed my amps and saw the amp gauge going down to 12, when it was usually over the 14 mark. Quote 2007 Chevy Suburban LT1 Pioneer AVH 5700 DVD Diamond Audio D3 6 1/2 components Kicker 06ZX650.4 amp Kicker 06ZX2500.1 (x 2) DC Sound Lab Level 4 18's with Level 5 coils Autotek Mean Machine 400.1D (replaced) Soon to come: rims body kit flow master pipes Confuscious say "he who say it can't be done shouldn't be bothering man busy doing it" Now feel free to go crawl back under that rock and leave this to the professionals.... Link to comment Share on other sites More sharing options...
onebadmonte Posted March 8, 2010 Report Share Posted March 8, 2010 Check under the hood. Is there a clutch on the alternator pulley, like the A/C compressor pulley. That is the only way they could get it to conserve fuel, buy not spinning the alternator armature. I see no reason why the charging system would be cycling on and off like that. Quote Warhorse vs A Pair of SMDeez build Olds Cutlass Cierra IB build 2 Fi IB3 18s Link to comment Share on other sites More sharing options...
jmitch Posted March 8, 2010 Report Share Posted March 8, 2010 part of that gas saving thingy that they put inthe new vehicles nowadays Quote I know a lil about everything so dont call me Mr. Know it All. Link to comment Share on other sites More sharing options...
n8ball2013 Posted March 8, 2010 Report Share Posted March 8, 2010 Check under the hood. Is there a clutch on the alternator pulley, like the A/C compressor pulley. That is the only way they could get it to conserve fuel, buy not spinning the alternator armature. I see no reason why the charging system would be cycling on and off like that. or its computer controlled. Quote THERE IS NO BUILD LOG! 1998 Chevy Silverado ext cab Alpine CDA-9887 4 Team Fi 15s 2 Ampere Audio TFE 8.0 2 Ampere Audio 150.4 3 Digital Designs CS6.5 component sets Dual Mechman 370XP Elite alternators inbound! 8 XS Power d3400 6 XS power d680 Second Skin Stinger Tsunami Wiring Sky High A Real Voltmeter not a piece of shit stinger. Link to comment Share on other sites More sharing options...
pervitizm Posted March 8, 2010 Report Share Posted March 8, 2010 damn, i am baffled!! I am driving this big ass presidential 2009 Black burban rental while my truck is getting fixed......anyway, i look down and its at like 12v so i think, damn its not charging! wtf! Not anywhere NEAR the 14v thing on the gauge. So i shut it off, turn it back on, it charges.....for about a minute. Then it drops back down. Well im about to call Enterprise (rentals) and tell em it isnt charging but then i drive it to work this morning and with the headlights on, it charges fine. As soon as the sun hit and the auto-lights went off, it dropped to 12v again...... ok i have 4 alts in my personal ride, you would think i would know something LOL - i have no idea whats going on here! Anyone with a newer Hoe or Burb know about this?? How do you like the ride in that 09 Burb? Quote 2007 Chevy Suburban LT1 Pioneer AVH 5700 DVD Diamond Audio D3 6 1/2 components Kicker 06ZX650.4 amp Kicker 06ZX2500.1 (x 2) DC Sound Lab Level 4 18's with Level 5 coils Autotek Mean Machine 400.1D (replaced) Soon to come: rims body kit flow master pipes Confuscious say "he who say it can't be done shouldn't be bothering man busy doing it" Now feel free to go crawl back under that rock and leave this to the professionals.... Link to comment Share on other sites More sharing options...
Derrick824 Posted March 8, 2010 Report Share Posted March 8, 2010 No need for a clutch on the pulley. It's computer controlled. I hated the factory electrical in my Yukon cause of that. It then hated me after installing a second non-computer controlled alt. Ecu kept freakin out. Quote Link to comment Share on other sites More sharing options...
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