Okay so here's my problem, I recently got a new radio installed in my 75 280z, as soon as I had that installed my blinkers stopped working for the longest time (month or so) as did my right brake light when pressing down on the brake pedal. But maybe less than 30 min ago they started to work again, then all of the sudden the tac stopped working as did fuel gauge. Like I noticed the voltage gauge showed the battery at a quarter charged then it would spike to full.
What's happening to my Z?