Volvo Repair: 1987 volvo 740 gle wagon automatic stuck in overdrive, volvo 740 gle, solenoid switch

Question
My 1987 volvo 740 GLE automatic(wagon) is stuck in over drive. The light on the dash flickered on and off for a short time. I hear a soft click when I press the shift button on and off. Relay or solenoid switch?

thank you  

Answer
most common is a bad relay.the overdrive relay is located on the fuse panel behind the ashtray.remove the ashtray and then remove trim around lighter socket then you will see 2 screws remove the screws and the storage area will come out the relay is white and about 1x1x3 inch.it will be towards the passenger side of the panel.