A lot of things can prevent the washer from working.

I have not had a windshield washer problem yet with any of the six Nissans we’ve had. But I’ve replaced one motor and cleaned several units in other vehicles.

... The w/washer is behind and below the driver side head light on our ‘99 Frontier 4x4. Look up from from the bottom.

... If ours was not working I’d first remove the little black hose at the bottom of the storage bottle (by the pump motor) and blow through the hose to see if it is free flowing. If the hose is OK I’d reverse blow the pump hoping to clear any sediments that might be locking it up. Then suck the contents from the bottle. A kitchen ’baster’ might suck it out good enough.

... Then get someone to operate the washer lever in the cab while you are close to the pump to listen and find out if it’s running. If it’s still not running check the electrical plugs for corrosion. One of the connections is very close to the pump. A multi meter should show if currant is flowing to the plug when the washer lever is operated in the cab.

Have a good one,    and CUL.. Don S..