MIKE-2U Posted April 2, 2012 Report Share Posted April 2, 2012 Just feel that my voltage drops to low at idle with the sterep only 1/2 way and gain under 1/2. Voltage drops down way low 13.5 4s. Any way to test a weak alt? Is it possible to damage or weaken an alternator? Quote 2006 Jeep Grand Cherokee LaredoPioneer AVH- 3200DVD2/0 Flex-A-Prene Welding Cable (2) Fully Loaded Fi Sp4's dual 1-------> My YouTube Channel <------- Needs more power those woofers will laugh at that turd Link to comment Share on other sites More sharing options...
rocking.that.eclipse Posted April 2, 2012 Report Share Posted April 2, 2012 Take it to autozone and they can hook it up and tell you if you have a bad alt. Quote Link to comment Share on other sites More sharing options...
Nikitaaa Posted April 2, 2012 Report Share Posted April 2, 2012 13.4 is good voltage my friend.. Your alternator is perfectly fine and nothing will be damaged Quote 2007 M/T Honda Civic Coupe EX (4) Sundown Audio X-8's (2) Ampere Audio 3800.1's (3) Stinger SPV-44 Batteries (1) Mechman 240 3:1 Ratio 4th order sealed from the trunkTEAM NWSPLBest termlab scores to date in Honda trunk:151.7db legal (official) IASCA trunk 3 classBest termlab scores to date in my walled Subie:152.9db legal (unofficial) IASCA advanced 2 class155db outlaw Link to comment Share on other sites More sharing options...
Sheena Posted April 2, 2012 Report Share Posted April 2, 2012 at full tilt whats your voltage drop to? Quote 09 Civic EX KDC-X395 (2) SKAR Audio VVX-12 Skar Audio SK-1500.1 4 cu ft @32 (new box and more port soon) Firing Forward not sealed off Stock 80 Amp Alt Big 3 In 1/0 Knu 2 Runs To The Back 1 Pos 1 Neg In 1/0 Knu DD-1'd 13.8v drop Link to comment Share on other sites More sharing options...
01ExSport Posted April 3, 2012 Report Share Posted April 3, 2012 Put a small load on it and see how much dimming you get/how fast it goes back up to 14+. Roll down both windows, put on A/C, etc. Honestly, you're drawing a bit of power off stock with that 2200, i'd be happy with 13's Quote Link to comment Share on other sites More sharing options...
MIKE-2U Posted April 3, 2012 Author Report Share Posted April 3, 2012 Full tilt i think i ve see 12.6 but on a de af song or so ive seen 11.8 then cut the volume off. Think its time for a new batt this ones 5 years old Quote 2006 Jeep Grand Cherokee LaredoPioneer AVH- 3200DVD2/0 Flex-A-Prene Welding Cable (2) Fully Loaded Fi Sp4's dual 1-------> My YouTube Channel <------- Needs more power those woofers will laugh at that turd Link to comment Share on other sites More sharing options...
Lbox88 Posted April 3, 2012 Report Share Posted April 3, 2012 lol, that could be it too. Where are you measuring from? I thought my alt was going on my last car but if I measured from alt+ to engine block I got 14.8 while the batt was only seeing 13.8. turned out to be a bad ground Just thought I'd throw my experiences out there if it helps you. Quote UBL | Build Log Link to comment Share on other sites More sharing options...
MIKE-2U Posted April 3, 2012 Author Report Share Posted April 3, 2012 My stinger meter is on my amp. At idle they battery and volt meter(amp) match up. I will check the voltage at full tilt on battery and on alt. Quote 2006 Jeep Grand Cherokee LaredoPioneer AVH- 3200DVD2/0 Flex-A-Prene Welding Cable (2) Fully Loaded Fi Sp4's dual 1-------> My YouTube Channel <------- Needs more power those woofers will laugh at that turd Link to comment Share on other sites More sharing options...
01ExSport Posted April 3, 2012 Report Share Posted April 3, 2012 I'd recommend getting an alt first if you could, might as well do it correctly instead of helping to limp your stock one along. Quote Link to comment Share on other sites More sharing options...
Guest Posted April 3, 2012 Report Share Posted April 3, 2012 at idle your alt probably does like 70 amps. tack on that old ass battery and your symptoms seem completely normal. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.