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Check the light switch for a burnt connector.

Your Taillights are on a different fuse than your headlights or directionals I would recheck your fuses again.

Could also be worth checking for open circuit wiring and bulb holders?

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Q: Why won't a 1989 Ford Mustang LX tailights and dash lights work if the headlights signals and dome light work and all fuses and bulbs are OK?
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