First - does your fog lights switch illuminate when you push it?

Second - check the fuse in the underhood fusebox labeled fog

If your fuse blows as you as you insert it or when you turn them on you have a bulb that's blown/shorted together or a wire pinched shorted to itself or ground.

On your 97 if I remember correctly you can go from the bottom or remove the bolts holding the slash guard. It's been so long maybe someone else can chime in.

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