12 volt batteries if fully charged should show 14.2 volts
13.6 - 14.6 volts.
truck battery Check the specifications on the winch to find its voltage and amperage.
the alternator has an internal voltage regulatornot all aternators have it internal should be a small sliver box located near the battery.
Truck Battery versus Car BatteryThere is no difference in a truck battery or a car battery unless you are talking about a semi. As long as the battery fits, it the same voltage, and has sufficient CCA (cold cranking amps) it will work in a truck or car.
when cranking the engine the battery voltage should not fall below 9.6volts if so replace battery
bad alternator, bad voltage regulator, bad battery, bad connections.
lack of charging system voltage.
Yes why not, you can recharge your truck PC by driving around. To recharge the PC first the truck battery should be charged. Driving recharges truck battery because every truck has a power generator inside it but you cannot recharge your truck battery if it is not working properly the acid level of the battery should be maintained properly. Better you check your battery before recharging battery.
a 127 should do the job,Wouldnt recommend a truck battery
check battery,starter voltage
Battery voltage
It should decrease