Marcos Maniacs

I'm settling in with my newly acquired 1991 Mantula.  I have an issue that is puzzling me.  A previous owner installed aftermarket HID low beam headlights.  I have not tried to drive at night yet, so I only recently tried to turn them on.  The first time, they flickered quite a bit, but came on.  Now the low beams don't come on at all.  I asked Rory about it and he said that the engine needs to be running and my previous attempts were without the engine running.  Yesterday I started the car and turned on the lights.  As soon as I got the switch into the position to run on the "parking" lights, my tachometer stopped. When I turned the lights off, the tach started again.  Also with the lights on (mind you I haven't even gotten to the position to turn on the low beams yet), the turn signals don't work, but turn the lights off and everything works again.  Still even with the engine running, the low beams don't work.  The high beams do work, but the little blue light on the dash which should indicate the high beams are on is actually working just the opposite.  The blue light is on when the high beams are off and the blue light is off when the high beams are on. Are there any electrical experts out there that might point me in the right direction?

Thanks,
Dave