Can anyone show me a diagram of where the headlight relay is located on a 1992 honda accord lx

Are you sure there is a headlight relay? I don't think there is. The flow is + battery terminal to the under hood fuse box, to the Combination Light Switch, to the under dash fuse box, to the headlights.

I am not sure, the switch was just replaced, the dim lights work but the brights will not come on

Not sure, had the dimmer switch replaced, dim lights work but the brights will not come on, they stay on dim

Since the Combination Switch was just replaced:

. Test all under dash and under hood fuses with a test light or multimeter.

. Replace the headlights. My bet is the bulbs are bad.

Ty so very much :)