Add Windshield Wiper / Washer Fluid: 1990 Ford F-250 Custom 4.9L 6 Cyl. Standard Cab Pickup

Adding windshield washer fluid to your 1990 Ford F-250 is a fairly straightforward process. The video above shows you where the window washer fluid reservoir is located in your F-250, how to remove the reservoir cap and how to refill the windshield wiper / washer fluid. The nice thing about adding windshield washer fluid is that you can't overfill the reservoir - once it's full, you can stop adding fluid!