1994 Camry that only has 1 headlight working Both high beams work but only 1 low beam I have replaced the light switch and the light dimmer relay and still no luck Is this a ground issue?

This is probably not a ground issue because if the ground were open then neither high or low beam would work on that particular light and if it were shorted then you would blow the fuse when you attempted to use the high beam.

OK, first off for the obvious, have you tried replacing the light bulb?

If replacing the light bulb doesn't fix it then chances are this is an open circuit in the + side to the high beam that doesn't work. You will need to use a voltage meter or testing light and find the location where the open is in the wire and repair it. These usually occur at connectors or splices but not always.