Battery light on while accelerating

[crazy_canadian]

Since my idler pulley bearing seized, (still the same bearing but cleaned up, spin very freely but with some noise, waiting for the new one to come in) When I accelerate, mostly in first and in second gear the battery light come ON, as soon as I left off the gas, it goes off, and it mostly comes off around 3000+ rpm. Its been like that for 2 days, but I havn't experienced any problems yet.
3 weeks ago I checked the alternator output : 14.54 volts

Is my alt dieing or something is just f*cked up?

 

[gonetimestwo]

mine used to do that when getting on her, but also went up to 17.8 volts. New alt. put in, and good to go, for now.

 

[SASHO91]

voltage regulator maybe screwy...
the battery light will come on in a under charge state, or over charge state.

 

[Ian Macoomb]

It's been my experience that when the battery light is on, the alternator isn't charging. You can tell because the lights dim down when it happens. I believe it's the regulator shutting down because the voltage is getting too high. It's a common problem with rebuilt alternators on the V8. I've tried two different regulators and a new alternator and I can't get it to stop doing it. Mind you mine is doing it above 5000 rpms.

 

[CerberuS]

You need an alternator.

Its always the same problem , Mine did same thing on my 7.3 Powerstroke.

 

["SHO"time]

i changed mine to and its still does it

 

[crazy_canadian]

problem fixed, it was only the little gray plug on the alt that was loose and very corroded.