I have a 1977 Se-- when I turn up the rio stat setting on my head light switch to turn up my dash lights--which don't work--I can control the water temp needle and oil pressure needle in their gauges by turning them up or down by the rio stat switch. Also, when I turn on my blinker the water temp and oil pressure needles move side to side with the blinker??? Does anyone know what may be causing my problems? thanks