Volvo Repair: Volvo 1994 940 Overdrive, fuse panel, storage area

Question
My overdrive sticks to 'On' sometimes and I don't even push the button to trigger it. The other day it stayed on from the time I started the car till the time I cut the car off. Is there any way to remedy this? Thanks for the help

Answer
most common is a bad relaythe overdrive  pump 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 passengers side of the panel.