The horn relay is located inside the fuse box, in the engine compartment on the drivers side of the car. It partially covered by a brace that goes from the shock tower to the front center of the compartment. This brace (three bolts) needs to be removed for access to the fuse box.
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I have a 93 and the signal relay is on the passenger side beneath the glove box. You can reach it by pulling the plastic panel out so that you can see and replace the flasher.
Google 1996 Buick Regal Custom and see.
The 1996 Buick Century horn relay switch is located behind the dashboard. The relay switch will be on the drivers side of the dashboard.
left rear wheel well
left side of frame near your fuel tank
Look on passenger side rear of engine
where is Horn relay on 1996 buick century.??
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Yes