I have notice that when i hit my brake, my headlights go off and come back on. In a split second. Also when i hit my brake or let off the gas, my powerpoint (cigarette lighter) goes off for a second and comes back on. Also my Speedometer will drop down to 0 and come back when i hit the gas. Any clue to where i might be having a connection issue at? Or what may be causing this?

1992 Civic EX 5spd.