Intermittent voltage drop?

[jhale2004]

Sometimes my amperage gauge will drop to about 10 or 12 but it usually stays a little over 14. Is there something going wrong? I don't have any amplifiers or anything extra that would pull a load on the electrical system. I did an alternator and battery test and everything was fine. Here are pics.

 

It was actually lower than this but by the time I snapped a pic it had started going back up.

 

And normal

 

[dwgr]

Mine does that too. I have a 2009 Silverado with a 5.3 L engine. I would like to know also.

[MikeNH]

Normal operation. Read your manual, it's supposedly more efficient this way.

Edited August 27, 2012 by MikeNH

[ruggedlife]

what he said ^ it's completely normal. no issues

[jhale2004]

Thanks guys!

[BigBlueLB756]

If you were driving a Volt, you could start to worry.

[Gurrzt]

The alternator in these newer vehicles are what is called "free wheeling" that is to say when the battery is fully charged, the alternator "disingages" via a clutch so even though it is connected to the serpentine belt, it is not causing any drag on the system, thus the gas savings. I PERSONALLY DO NOT SEE A GAS SAVINGS ON MY VEHICLE.

[MikeNH]

The alternator in these newer vehicles are what is called "free wheeling" that is to say when the battery is fully charged, the alternator "disingages" via a clutch so even though it is connected to the serpentine belt, it is not causing any drag on the system, thus the gas savings. I PERSONALLY DO NOT SEE A GAS SAVINGS ON MY VEHICLE.

 

Not quite. No clutch or any fancy stuff, it just backs off the output.

 

 

Sent from my iPhone using Tapatalk

[Debo511]

It is called Regulated Voltage Control .

[5829BMG]

The alternator in these newer vehicles are what is called "free wheeling" that is to say when the battery is fully charged, the alternator "disingages" via a clutch so even though it is connected to the serpentine belt, it is not causing any drag on the system, thus the gas savings. I PERSONALLY DO NOT SEE A GAS SAVINGS ON MY VEHICLE.

 

 

Every .0001 of a gallon counts when you try to beat the C.A.F.E. ratings

[Gurrzt]

The alternator in these newer vehicles are what is called "free wheeling" that is to say when the battery is fully charged, the alternator "disingages" via a clutch so even though it is connected to the serpentine belt, it is not causing any drag on the system, thus the gas savings. I PERSONALLY DO NOT SEE A GAS SAVINGS ON MY VEHICLE.

 

 

Every .0001 of a gallon counts when you try to beat the C.A.F.E. ratings

 

 

Point well taken

Edited August 28, 2012 by Gurrzt

[Wolfmanjohn]

It is called Regulated Voltage Control .

 

 

And there are 6 different states of it, according to my Helm manuals.

[cs300823]

My 2007 V-Max has done that since the day I got it brand new from the dealer...the dealer said it's typical of the newer trucks.

;0)

[00Silverado4x4]

I'm just curious as to why my voltage starting "dropping" after a couple of years of driving. The voltmeter was always constant at ~14 volts then one day it just started dropping and raising and has ever since. I'm always scanning my gauges, pet peeve of mine. I found out it was normal operation but to not see it happen until after a couple of years driving???

[ruggedlife]

mine never did it in my gmt800. only in my gmt900