Hello everyone, I recently changed out my alternator due to my previous one going out on me and ever since i changed my alternator my car has been flashing the battery light and brake light and while that’s happening my rpms would drop as if my car was going to stall (i would show a video but it says format not supported) i noticed that my battery voltages were around the 15s it would even jump to 16 at times it would usually sit around 14 volts i also changed out my negative terminal my battery post. can anyone help me identify the problem? i would really appreciate it!