[Redog]

dielectrical grease has been used for years, it was used on bulb connections at the factory as recently as the early 90's. not neccessary today with the weather proof connections on cars today

I think the bulb is going out. try a new one. Sometimes the bulb isn't all the way blown and the coil wire inside the bulb still makes the connection and hitting it makes or breaks the connection.

Power Steering? What is the level in the PS tank? check that first