The 1994 Ford F350 van wiper blade sizes are 18" wiper blades on both sides front. See sources and related links below for more information. Since there are over 22 different wiper arm attachments, do not buy wipers just by length only - be sure to lookup exact wiper blade part numbers by vehicle make, model and year for the brand wiper you decide to purchase. This ensures correct length AND correct attachment.
It's a 20 in. wiper blade
2004 express takes 22" wipers
The E350 is an Ecnoline van, The f350 is a Truck
it is under the dash rite on top of the steering column GOOD LUCK
20in wiper blades
at the base of the wiper the cover can be lifted so you can access the nut and remove the wiper. Once that is off you can remove the base cover to get to the motor.
Here they are:Driver = 19"Passenger = 19"
This will depend on the actual model/type of van. See sources and related links below and select exact model you are looking for. It will show you all wiper sizes and attachments.
The 1997-2005 Chevrolet Venture takes 24" replacement windshield wiper blades on both sides front and a 16" rear replacement wiper blade.
I am wondering the same thing in 1994 safari van, have only wipers on high, i've unplugged the plug at the wiper motor & checked for power, only have power to wipers on high, now is the switch in the column with the signals,
P235-70r-15
you have to remove the dash, wiper arms, wiper arm grill, remove the heating duck work. and you should see it. bolted in the middle of the firewall. remove the four bolts then unplug it. Now do it backwards to reinstall a new one. Time to replace one is about 3 hours and a lot of yelling at the van.