As far as I know nene of the volvo fans have built in relay. Usually the relay is a black box hiding behind either the left or right headlights. The speed control on the other hand (low vs high) is built into the fan motor. Its not a separate resistor pack as found on the bmw aux fan. Thats what I meant to say. Sorry for the confusion. The beauty of this setup is the volvo fan can completely replace both the aux fan and the clutch fan by connecting the volvo fan to the aux wires. This way you can take advantage of the bmw low and high speed relays.
Volvo 850 is fwd 8 series (in volvo speak) with 5 cyl engine. There was no 840, not that it makes a difference.
The 940 (4 cyl) and 960 (6cyl) rwd cars both used the same fan. I think all models have to be 1992 or newer to have this fan. Before that volvo used a similar setup as bmw (clutch fan + small electric pusher fan).
