Where is the relay on a 1991 Cadillac deville for the heater blower?

On a 1991 Cadillac DeVille, the relay for the heater blower is typically located in the fuse box, which is found under the dashboard on the driver's side. You may need to consult the owner's manual for the exact location within the fuse box, as there may be a diagram indicating the specific relay for the heater blower. Additionally, check for any other related fuses that could affect the blower's operation.