Remove the front fog lamp relay (A) from the engine compartment relay box.

There should be continuity between the No.1 and No.2 terminals when power and ground are connected to the No.4 and No.3 terminals.

There should be no continuity between the No.1 and No.2 terminals when power is disconnected.

Disconnect the negative(-) battery terminal.

Remove the front fog lamp switch from the center facia panel and disconnect the 6P connector.

Operate the switch and check for continuity between terminals with an ohmmeter.