94 blazer got code 75-system voltage low.it will start and the battery will go down
battery guage will go to about 10 thanks for any help

 

hey joe
you might want to check the alternator you can do it by putting a screwdriver close to the back center part of it with the engine idling you will feel it magnetizing.. if it feels week you might need to replace the carbons or the complete alternator... try also turning the ext lights if the amps go down again its also a sign that the alternator is going bad
just be very careful with the pos+ cable on the back also we don't want to ground that with the rest of the armor
from joe to joe

hope it helps
Joe