Joined
·
35 Posts
2005 LLY Duramax with 2 batteries. Clock keeps resetting itself to 12:00 every time I start the truck and the batteries seemed a little weak on starting. Alternator is putting out 14.4-14.6 volts at idle so I think the batteries are on the way out. I want to connect my charger to see how it reacts.
I thought I should connect the charger (+) clamp to the post inside the red box marked BATTERY (+) just below the GND tab and attach the charger (-) clamp to the GND tab but I got no response from the charger. Is this the wrong way to connect a charger?
Connecting the charger to either battery results in charging so I know the charger is working. With 2 batteries I'm unsure how to proceed to be sure both batteries are charged.
I left the charger on one battery for a little while and, although it looked like it was going to charge normally, after a while the charge needle started jumping up and down. This happened with both batteries which, by the way, are about 5 or 6 years old.
I thought I should connect the charger (+) clamp to the post inside the red box marked BATTERY (+) just below the GND tab and attach the charger (-) clamp to the GND tab but I got no response from the charger. Is this the wrong way to connect a charger?
Connecting the charger to either battery results in charging so I know the charger is working. With 2 batteries I'm unsure how to proceed to be sure both batteries are charged.
I left the charger on one battery for a little while and, although it looked like it was going to charge normally, after a while the charge needle started jumping up and down. This happened with both batteries which, by the way, are about 5 or 6 years old.