92 headlight relay location

Don't think you have a headlight relay.

I don't think there is a relay but there might be a circuit breaker in the circuit somewhere, possible part of the headlight switch itself. If it's going bad it could cause the flicker. So could a loose connection to the lights or a loose ground wire to the lights.

Thanks for the reply AZ, I think that I have a corroded ground wire from the battery to the chassis, I have been racking my brain and all the wires I can find. I replaced the bulb socket connectors, and still no change. I was going to change or add another ground wire to the chassis, and splice the ground wire at the bulbs to the chassis also, hope it will cover the ground issue. Thanks again. Gary

Be sure and check the ground wire that comes from the light socket and bolts to the radiator support. I took mine off once for some reason and then put it back on. I thought I had it on tight but it was not tight enough. A week later my right headlight started to dim out. I was sure I had major problems and all it took was more tightening of that ground wire.