Acura Repair Questions? Ask a Mechanic for Answers ASAP
It sounds like you have a dead short somewhere. Somewhere in the system the positive voltage is reaching ground. The first place I would check is the alternator- unplug the alternator and see if the sparking stops when connecting the battery.
Both, but disconnecting the large power wire at the alternator would probably be sufficient.
So the 4 pin connector is shorting or the alternator is shorting internally? I would probably suspect the alternator would be more likely to cause that type of dead short.
If it's just the connector then look for burn marks or broken pins in the connector.
Do you have an old alternator you could plug into the connector? That would tell you if the problem is in the alternator or the connector.
Please let me know if you need additional help on this one.