Hi, if the light on the switch is coming on, the relay is fine. Unless both bulbs are burned out, the problem is in the wiring between the relay and the lights. I recommend you trace the wiring backward from the passenger side fog light to the power box under the hood to see if the wire is cut. There should be two wires coming out of the power box--one going to each fog light. If the wiring looks good, it is also possible that the ground to the lights is bad.
No that's how you know the relay is working, by that clicking sound. Your bulbs might be bad or a open wire between the relay and the bulbs.
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