Was driving on the highway yesterday and my brake light and charge light came on. then it went off and came on only when i accelerated, dim then brighter as i pressed the gas pedal. i shut off the engine, walk out for a min, came back, tried to start it it wouldnt start. no hazards, no nothing. jump started it and got it home. i bought a new battery, but still no nothing. cables are good, terminals are new. anyone know what this could be?

1985 Toyota 4x4 22R straight axle, Stock height, Original owner