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most people refer to alternators but they are generators. they are one and the same.
yes, if the charge light is on along with the brake light, the alternator has failed. and needs to be replaced.
to be sure, use a voltmeter on the battery with the engine running. it should be 14 to 14.5 volts
running the truck with the alternator disconnected tests nothing. your systems along with the alternator need 12 volts to work.
10.5 volts is no good. the battery needs to be charged and then repeat the test
I am at work, will get back to you in the morning
sorry, have been sick. just rying to catch up.
have you checked for power to the alternator???
ok, what is the voltage with the engine running???
ok, I attached a wiring diagram for you to check. there are 2 fuses in the under dash fuse box. check them with a test light or voltmeter for power on both sides.
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