Right side windshield washer don't work, left one does.

Windshield Washer Pump

1990 Ford Truck F150 1/2 ton P/U 2WD 5.0L FI 8cyl

The Windshield Washer Pump is located: Under hood, driver side front side of wheelwell, mounted inside washer bottle.here's the part. TAAP Windshield Washer Pump 7 664 1990 Ford F150 1 2 ton 2WD 8...

It may not be your fuse, your windshield fluid reservoir has a pump that when you activate the switch it pumps the fluid to spray your windshield. The fuse box should be located in the engine compartment on the left hand side or the right hand side of the engine.

If the washer fluid is not pumping and they're new, something isn't connected right. They're obviously not getting power. Either that or the pumps didn't work in the first place.

Check fuse in fuse box inside vehicle,if good,then go to windshield washer pump and disconnect wiring,get meter and check if power is going to pump,if so then pump is at fault,if no power,thenwiring could be short somewhere to fuse box.Also check your washer hoses,that they are not kinked or came loose.Pump could just be loose.

Hi Ron, I'm not familiar with your vehicle but I believe that the front and rear have separate pumps (but I may be wrong). If I'm right I doubt that both would go out at the same time. What's more likely is that a fuse has blown and power is not going to either pump. Check the fuses.Regards John

under the hood on either the left or right side just follow the hoses

Have someone press or hold the washer switch and listen underhood for a small pump sound {Hum}. If you don't hear a small hum you probably need a new washer fluid pump, pretty common for this old of a car. Imagine for the last 15 years sitting in wet fluid,sometimes drying out, getting refilled, turned on and off, on and off that little pump had it's day and retired! Most auto parts stores sell inexpensive replacements. Easily come out and go back in in reverse order. Pumps are usually mounted underside of fluid tank,just follow any visible washer hose.

Fuse Locations & Functions
1. Washer nozzle heaters, glove compartment light (10A).
2. Turn signal lights (10A).
3. Fog light relay, instrument panel light dimmer switch (5A).
4. License plate light (5A).
5. Comfort system, cruise control, A/C, steering wheel module (7.5A).
6. Central locking system (5A).
7. Back-up lights, speedometer vehicle speed sensor (VSS) (10A).
8. Open
9. Anti-lock brake system (ABS) (5A).
10. Engine control module (ECM): gasoline engine (10A)
11. Instrument cluster, shift lock solenoid (5A).
12. Data Link Connector (DLC) power supply (7.5A).
13. Brake tail lights (10A).
14. Interior lights, central locking system (10A).
15. Instrument cluster, transmission control module (TCM) (5A).
16. A/C clutch, after-run coolant pump (10A).
17. Open.
18. Headlight high beam, right (10A).
19. Headlight high beam, left (10A).
20. Headlight low beam, right (15A).
21. Headlight low beam, left (15A).
22. Parking lights right, side marker right (5A).
23. Parking lights left, side marker left (5A).
24. Windshield washer pump, windshield wiper motor (20A).
25. Fresh air blower, A/C (25A).
26. Rear window defogger (25A).
27. Motor for rear windshield wiper (15A). (if equipped)
28. Fuel pump (FP) (15A).
29. Engine control module (ECM) gasoline engine (15A)
30. Power sunroof control module (20A).
31. Transmission control module (TCM) (20A).
32. Injectors: gasoline engine (10A)
33. Headlight washer system (20A).
34. Engine control elements (10A).
35. 12 V power outlet (in luggage compartment) (30A).
36. Fog lights (15A). (if equipped)
37. Terminal (86S) on radio, Instrument cluster (10A).
38. Central locking system (w/ power windows), Trunk light, fuel door, Trunk lid (15A).
39. Emergency flashers (15A).
40. Dual tone horn (20A).
41. Cigarette lighter (15A).
42. Radio (25A).
43. Engine control elements (10A).
44. Heated seats (15A). (if equipped)

Fuse arrangements in fuse bracket/battery:
S162. Glow plugs (coolant) (50A).
S163. Fuel pump (FP) relay/glow plug relay (50A).
S164. Coolant fan control (FC) control module/coolant fan (40A).
S176. Relays panel interior (110A).
S177. Generator (GEN) (90 Amp.) (110A). Generator (GEN) (120 Amp.) (150A).
S178. ABS (hydraulic pump) (30A).
S179. ABS (30A).
S180. Coolant fan (30A).

the pump motor likely is bad. get a used washer fluid reservoir at a pick n pull yourself or at car-part.com. page with * is lowest cost.

Pump and Reservoir, Windshield Washer Removal

1. Disconnect the battery ground cable (14301).
   
2. Raise and support the vehicle.
   
3. Remove the RH wheel (1007).
   
4. Remove the RH front fender splash shield (16103). Refer to Section 01-02 for the removal procedure.
   
5. Remove the windshield washer reservoir top bolt.
   
   
6. Disconnect the windshield washer reservoir fluid level sensor electrical connector.
   
7. Disconnect the rear window washer pump electrical connector from the rear window washer pump.
   
8. Disconnect the windshield washer pump electrical connector from the windshield washer pump (17664).
   
9. Place a suitable drain pan under the windshield washer reservoir (17618) and drain the washer fluid.
   
10. NOTE: The rear window washer hose end is color-coded, matching the connector on the rear window washer pump. Match the colors to ensure proper installation.
    
    Disconnect the washer hoses from the windshield washer pump and the rear window washer pump on the windshield washer reservoir.
    
    
11. Loosen the two windshield washer reservoir side bolts.
    
12. Remove the windshield washer reservoir by sliding it out of the side slots.
    
13. Remove the windshield washer pump.
    
    Installation

To install, reverse the removal procedure. Tighten the lug nuts (1012) to 98-118 Nm (72-87 lb-ft).

usually it's in the washer bottle which is usually in the fender well, ahrd to get to.
The fuse that controls it should be listed in your owners manual. Usually a 10 amp fuse in the fuse panel inside the car usually on the instrument panel somewhere.