Along the right side sill, over the wheel well to the right taillight area, where there's a little plastic check valve (similar to the one under the hood, but L-shaped rather than T-shaped) then up the pillar to the washer nozzle. The check valves commonly fail, either blocking flow or allowing backflow. Reach up inside above the taillight assembly to find the hose and check valve with enough slack in it to be pulled down for flow testing up to the check valve. If you have trouble sourcing an L-shaped one then a T-shaped one can be used, blocking off one of the outlets (like melting the end or whatever). The nozzles rarely get plugged, but if needed can usually be poked clear with a pin. Two types of nozzles were used, a later one with a slit that rarely ever gets pugged and isn't adjustable for aim and an early one with a little steel ball outlet that can be aimed by inserting a pin to rotate it and is more easily plugged.
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Dave -still with 940's, prev 740/240/140/120 You'd think I'd have learned by now