mostly because of the Lucas electrical system. Mr. Lucas was the guy that invented the intermittent windshield wiper. it wasn't intentional, that's just how they work. He also invented the three-position headlight switch: off/dim/flicker.
it's ok, i've owned three of them: MGBGT and two Sprites. glutton for punishment i guess.
1999 Winnebago Minnie 29', Ford V10, Close to stock.