Where is relay for rear demister on Volvo 740gl 1990?

In the 1990 Volvo 740 GL, the relay for the rear demister is typically located in the fuse box, which is found under the dashboard on the driver's side. You may need to refer to the owner's manual for the exact relay designation, as it can vary slightly by model year. Make sure to check the relay and associated fuses if the rear demister is not functioning properly.