Can I change alternator without disconnecting battery?
Can I change alternator without disconnecting battery? Never work in the engine bay of a vehicle without first disconnecting the battery for safety. Working on the alternator without disconnecting the battery could result in getting shocked or damaging the vehicle. You can leave the positive cable attached. Why does the battery warning light come on after replacing the alternator? A relatively common “side-effect” of replacing a battery and/or alternator in a car is to have the voltage (battery) warning light come on. This is especially true in late-model vehicles with their more sophisticated internal diagnostic systems. When do I need...