When it fails it can do either or both. Mine has done both. What can happen is if it starts to seap oil, it can get into the connector and cause it to do weird things when there is nothing overly wrong, per se. Try undoing the connector, and make sure it's clean and dry. If there is oil in it, could be what's causing the issue. You have to be careful if it is seaping oil to the point it's really starting to leak. As well if you break it off, as the plastic can get brittle over time. Remember you need a special socket for it if you replace it.
The beatings will continue until attitudes improve!
HID Quad bi-xenon + foglight retrofit