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  #1  
Old 05-18-2013, 07:50 PM
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Default Voltage acting up

Just curious if anybody has run into this before

I have 3 dekas in the rear of my truck and a 300amp EA alt up front and for some reason my voltage stays in the 13.6-14.0 range while driving, no amps are hooked up currently, and when it does reach 14.4v it takes about 15-20min worth of driving to get there..I have taken everything out, swapped alts, swapped batts, and I get the same result no matter what.. All of my batts have been fully charged and rest at 12.9v

Also from front to back its only a 0.1v drop


Any help on this?
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Old 05-18-2013, 08:13 PM
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Quote:
Originally Posted by Boomsday View Post
Just curious if anybody has run into this before

I have 3 dekas in the rear of my truck and a 300amp EA alt up front and for some reason my voltage stays in the 13.6-14.0 range while driving, no amps are hooked up currently, and when it does reach 14.4v it takes about 15-20min worth of driving to get there..I have taken everything out, swapped alts, swapped batts, and I get the same result no matter what.. All of my batts have been fully charged and rest at 12.9v

Also from front to back its only a 0.1v drop


Any help on this?

I have got this same issue. Voltage sits around 13.6 and after a while of driving gets to around 14.2. Could be from battery(s) being low after sitting and alt is charging causing a voltage lower then ideal. Just my .02
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Old 05-18-2013, 08:17 PM
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Originally Posted by hj2010 View Post
I have got this same issue. Voltage sits around 13.6 and after a while of driving gets to around 14.2. Could be from battery(s) being low after sitting and alt is charging causing a voltage lower then ideal. Just my .02

but the batts are fully charged
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Old 05-18-2013, 08:22 PM
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Hey bro what mileage on ur car??
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Old 05-18-2013, 08:25 PM
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You try a different meter?
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Old 05-18-2013, 08:32 PM
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Originally Posted by Boomsday View Post
but the batts are fully charged
Yea I totally didn't think about that. I was just throwing that out there. I've got a brand new d3400 under the hood and has been fully charged and still with your same issue. Could heat be a factor at all? My car is 251000 with new tranny/motor 3 yrs ago.
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Old 05-18-2013, 08:35 PM
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Originally Posted by ninos View Post
Hey bro what mileage on ur car??

like 175.XXX
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Old 05-18-2013, 08:36 PM
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you tried putting the stock alt back in and it still does exactly the same thing?
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Old 05-18-2013, 08:37 PM
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Quote:
Originally Posted by B-Shot View Post
You try a different meter?

Yep I have tried different everthing

Different alts
Different batts
3 different DMM
Different fuses

And always the same result

One of my alts is externally regulated even if I turn the voltage knob all the way up, my voltage doesnt move.

It just started happening all of a sudden
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Old 05-18-2013, 08:39 PM
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Quote:
Originally Posted by sthrnbumpn View Post
you tried putting the stock alt back in and it still does exactly the same thing?

Yep I have

2 stocks
3 ho alts for my truck

I only use 1 at a time, but all of them same result...
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