IT COULD BE THAT YOUR BATTERY IS LOW OR YOU MAY NEED A NEW ALTERNATOR
the diodes in the alternator have gone
A typical corrosive material associated with an automobile, light truck, or SUV is battery acid (sulfuric acid solution in the lead-acid battery).
altinater is probobly dead
In most cars the battery is in front of the engine. In some cars, it is beneath the truck sometimes with the spare tire.
Try the cables from your battery and alt. Sometimes these can corrode.
i just changed my batterys out on my truck now my check engine light is on?
Very likely an alternator problem; if the alt is not working soon the battery would be drained and the truck would shut off.
Either the battery is not fine and has a dead cell, or something is on pulling power from the battery. Any light on or stuck relay will drain the battery overnight.
You probably have a bad alternator. Need to check the charging system.
lack of charging system voltage.
It arcs because something is on when you installed the battery. Can be a light, or relay sticking.
Then something is on pulling power from the battery. Any light on the vehicle or any relay that is stuck closed.