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Q: 87 Grand Marquis 5.0L V8 Where is the Headlight relay located? on 1990 Mercury Grand Marquis

I replace the dimmer switch but my low beam light still won't come on purchased headlight relay but can't locate it under the hood.
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Have you checked your headlight switch - the switch itself? Common for failing. And usually ruining and melting the wiring connector too. Inspect that.
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