my voltmeter is reading high
to high i think, and i have tryed 3
alternators so i know that the arent causingthe high charge
or at least i hope not i also have problems with a draining battery
but what can cause high voltage and a draining battery besides the alternator

 

how high?...beyond 14.5 @idle?

 

yeah way beyone more like 16 or 17
what can cause it besides the alternator

 

but it doesn't go up when you hit the gas

 

Wow...verify if it is that high with a voltmeter...you'd be cooking batteries at 17

 

i know
it really pisses me off
one day it's fine and th next.....

 

put the voltmeter across the battery...should be around 12.6 at rest...start the truck,it should jump up to about 14.5

A REALLY bad battery could cause the alternator to have to "overcharge"...but you should be smelling that hot of a battery

 

well it turns out there must be something wrong with the gauge in the dash
it reads right when it's shut off but wehn i started it and used the multimeter
on the battery it went from 12 something to 14.3 then went down to 13 something
when the engine came down off fast idle

 

Yeah,thats about right...guess the gauge is screwy

 

is there anything else that can drain a battery overnightbesides the alternator
i put in a new head unit i dont know if that could do it i take the faceplateoff it when
i'm not driving so the clock is not draining any juice... or it shouldn't be