Where is the theft deterrent relay on a 1989 Buick Reatta?

On a 1989 Buick Reatta, the theft deterrent relay is typically located in the fuse box under the dashboard on the driver's side. It may also be found in the engine compartment fuse box. To access it, you may need to remove the cover of the fuse box and look for a relay labeled for the theft deterrent system. Always consult the vehicle's service manual for the exact location and identification.