behind the glove
In the relay/fuse panel behind the ashtray. After you remove the ashtray and holder you will need to remove the box above it to access the relay
allows power distribution to the overdrive solenoid for overdrive engagement.
The overdrive relay is located in back of the fuse box which is behind the ashtray.
Try overdrive relay, you can buy them anywhere, replace old one, it is very easy.. I had to replace one on my 88 740. Give it a shot before you let someone work on it.
change the overdrive sensor should be on the left side of the gear box.
Behind the ashtray is where it is located. You will need to remove the box above the ashtray to gain access to the relay as you can't slide the fuse/relay panel out otherwise. BTW if the car is an automatic the relay is white and sits on the left side of the panel
in the center console, under the Radio
Yes I just did that to mine, and it works great. No problems.
In front of the battery, directly behind the headlights on the passenger side. Follow the wires from the fan switch on the top of the radiator.
http://www.volvoclub.org.uk/faq/WaterPumpChange.html
pull out ashtray and lighter- realys are behind ashtray
They are at the back behind the ashtray, look in the gap at the top of the fuses.
You probably mean Overdrive solenoid, on the transmission left side Hope it's help