The back wiper fluid is supplied by the windshield washer fluid tank in your engine compartment on the 2003 Ford Explorer ( 4 door )
On the 2003 Ford Explorer the wiper blade sizes vary depending on the trim-level of the Explorer. See sources and related links below to lookup wiper blade sizes for exact make, model, year and trim.
You will have to remove the wiper arms, then remove the cowl, and then the wiper motor.
The brake fluid reservoir is under the hood on the driver side. The fluid is added to the master cylinder with the yellow cap back near the wiper cowl.
If your motor is working you don't have to worry about the fuse. It has something to do w/the motor itself.
According to the 2003 Ford Explorer owners manual : ( DOT 3 brake fluid , meeting Ford specification ESA-M6C25-A )
A 2003 Ford Explorer holds 16 quarts of transmission fluid in the pan and torque converter. Fluid levels can be checked via the dipstick in the engine compartment.
does the 2003 navigator have separate station to put wiper fluid for the rear?
it has to be pumped into the bottom of the transmission
Actually , starting with the 2002 ( 4 door ) Ford Explorer , there is no automatic transmission fluid dipstick
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The 2003 Ford Explorer Sport Trac 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.
The 2003 Ford Explorer has the most common hook-end wiper arms. See the Sources and Related Links section below for installation videos. Also, purchase the replacement blades first and there will be additional instructions/illustrations on the replacement packages. Locate and press the tab or button where the wiper blade is inserted into the hook of the wiper arm and pull wiper blade out of hook. You may have to rotate and flex the blade to make enough clearance for the hook to pass through.