My schizo GL wagon is having some issues. When the main cluster instrument panel lights are supposed to come on (ie headlights on and panel lighting adjustment turned up) the tachometer zeros and both turn indicator lights begin glowing steadily. Everything else is operating normally, and no fuses are blowing out. This happened a couple of times and went away, but now seems permanent. I have my theories, but would like any input out there. Anything in particular I should check, given those odd symptoms.