07JKX

yea! so everything was fine yesterday until I went to start the jeep. Cranked right up, my battery light came on, and I noticed a very loud whine.

The whine noise varies based upon rpm.

I used my superchips to pull a "charging system output high" code.

After some google research, I checked my battery cable and tightened the accesory wing nut. Battery light went away and after clearing the code, it no longer appears.

PROBLEM. I still have a terrible whining noise.

Had advance auto parts check the batter and alt... they say both are GOOD

Had autozone check the same and they say my Alternator is BAD

Does anyone have any experience with this? Does this sound like an alternator issue?

So long as the jeep cranks and runs, could there be any problems if I do not replace the alternator right away? ie electrical issues?

jcrcan25

do you/ did you have a cat ??

Jbry

Had the same thing happen to my jeep after I installed a distribution block, same code, same sound....it didn't go off when I retightened my cables back, it did however go off and everything went back to normal when I had my alternator rebuilt...blown diode:(

07JKX

that was pretty much exactly what happen to me and almost word for word from the autozone guy. blown diode.

i found a replacement for 150 and change with a lifetime warrantee. I guess i should go ahead and buy it. At least i will never have to pay for another alternator after this one.

thanks man.... well kinda... lol ... and here i thought i was going to get to make a principal only payment on the jeep this month

BTW... how long did you drive around prior to fixing it?? I am wondering if I can wait for the next paycheck without damaging anything or if I should just throw it on the credit card

07JKX

okay... alternator threw a "charging system output low" code on me now.

The good news - that annoying whining noise went away

The bad news -so did the functionality of the alternator

lol