battery light comes on when heavy accellerating voltage drops reving

[Kryptonitewhite 10+ year member]

So I got on it today getting on the interstate, battery light came on, stayed on a few seconds then went off. Put it in neutral, reved it, nothing for a few seconds, stopped reving, light came on a few seconds. Pulled over, put DMM on front battery 14.18. Reved it up, droped to 13.2...stereo off. Checked rear batts, 14.18 running, dropped to 13.5 off, probably would have kept dropping slowly.

O'Reilley AGM in front, 2 large O'Reilley AGMs in back 100aH. Iraggi HO alt, the highest at idle lowest peak: 160-180 idle, 200-220 peak.

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[AQHDC3 10+ year member]

Sounds like a Diode in the voltage regulator most likely went bad. You will probably have to send the Alt into irragi.

 

[Kryptonitewhite 10+ year member]

I know they are busy with the revamp, I don't get emails back. Should I try calling them?

 

[AQHDC3 10+ year member]

You can try calling them but Good luck I've heard all the bad stories of there customer service.

 

[Stalin-ohaulic]

Definitely the alt. This is why nobody brags on those alts anymore.

 

[Kryptonitewhite 10+ year member]

I went to Van's today, the local rebuild shop. The guy took the big *** DMM to my battery to confirm the voltage drop, told me to pull it and bring it in for a real test, and get this shit: He told me not to add alts but add batteries! So yup, Ill go to Advanced and O'reilleys now //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

made a vid showing the drop on the van's voltmeter while driving. I dont hear any squeel, it happens even at low RPM...

 

[BeAlLsTaR13 10+ year member]

ya my battery light has been coming on recently, ive got a dc power 275 amp alt, my mech told me it is most likly a bad diode in the alt

 

[Kryptonitewhite 10+ year member]

Went and load tested the alt, only doing 99A (rated 160-200A @ idle 220 peak above 1500 RPM) and tested the batteries, theyre all good. Guess I gotta get ahold of Iraggi and see if it's a warranty issue. yay!

 

[Kryptonitewhite 10+ year member]

pulled the Iraggi today, was gonna drop the stock back in so I have a vehicle to drive till I get it repaired and order a 2nd alt. The stock one has been sitting on a shelf in the basement since I pulled it. it didnt get wet, but it's been humid. The **** thing rusted and I cant even spin the pulley! Now what the f do I do? I am stranded at home, cant get ahold of Iraggi.

 

[whitedragon551 5,000+ posts]

Go pick up a stock and use the old one as a core.

 

[Kryptonitewhite 10+ year member]

I know a lot of people are gonna talk shit, but 4 separate forums have said the same thing. But it never fails, anything I do, so many people think they gotta say sumthin stupid and when I get mad Im told not to over react.

I was told to spray her down. So I did. Do I need to use anything to remove it from the pulley after it sits over nite?

 

[Kryptonitewhite 10+ year member]

not sprayed yet, wood that got wet previousely

not sprayed yet

sprayed

 

[Kryptonitewhite 10+ year member]

brought the HO alt and the stock alt back to Vans, talked to the owner this time. What a difference. We had a blast going back and forth, guy knows his shit. The brush tensioner spring went bad. He replaced the assembly for me and I gave him my stock alt. I know he came out ahead, but my HO alt works great so I don't care!

 

[AQHDC3 10+ year member]

Glad You got It taken care off

 

[Kryptonitewhite 10+ year member]

Thanks! And thank you all for your advice!