The overdrive relay is located in back of the fuse box which is behind the ashtray.
allows power distribution to the overdrive solenoid for overdrive engagement.
Ukraine
where is nissan 93 pickup overdrive relay
Behind glove box
BEHIND THE ASHTRAY IN THE FUSEBOX, A WHITE RELAY STANDING STRAIGHT UP.
there is a 10 amp fuse marked console in the fuse box that actually provides power to the overdrive cut of swicth and overdrive relay
Could be a bad overdrive solenoid switch or relay. No, I don't know where they are on this car.
Behind the ashtray--google "Volvo 940 overdrive relay" for detailed answers on how to get to it. It's beyond the fuse panel, the white one with black print on the right.
both
It is located on the passenger side firewall next to the fuel pump relay
it is right underneath the steering wheel gasket