13.6 volts is fine. Basically the battery is at 12 volts, if you see
anything over 12 volts while the truck is running the alternator is
I would consider anything > 13.0 volts to be fine.
anything < 13.0 volts would be of concern.
THis is too general. Altenators are tempature compensated and the
output voltage will vary with case temp. In winter time it is not
unusual to set it well above 14 volts at times. On a hot day after it
has been running for a while, it could be from 13 to 13.6 volts but
not 14 because that could lead to short battery life in a hot climate.
Measure voltage at battery too not alt as most alts have remote
sensing somewhere in the wiring buss at main distribution for voltage
regulation too so it can vary some at battery some under heavy load.
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I understand you response, in the summer time expect a little lower voltage
and in winter expect a little more... I guess we will have to wait till
winter to see what it does. Luckily they can be changed in 5 min or so.
Thanks for the response,
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