Is the daytime running light bulb same bulb as the low beam bulb on 98 Chevy Cavalier because the daytime running lights work but low beams don't when the switch is turned on High beams work also?

Answer 1

On my 97 Chevy Cavalier the daytime runnings lights are the Hi beams (brights). Have you replaced any of the bulbs? Yes, same bulb. This means your headlight wires are corroded and BOTH headlights lost the ground, so the circuit is open. The wire harness runs in front of the radiator. Pull off the cowl as if changing your headlight bulbs. The inspect the wire harness for corrosion (green-blue grainy spots). Repair the corroded wire by cutting out the corroded part and bridging the gap with a new piece of wire.