Where is the radio suppression relay on a 1990 Volvo 240?

The radio suppression relay on a 1990 Volvo 240 is located in the engine compartment, specifically near the battery. It is typically mounted on the inner fender or near the fuse box. This relay helps to reduce electrical interference caused by the vehicle's ignition system. If you're having issues with the radio, checking this relay can be a good starting point.