According to the Owners Manual, page 191, fuse #'s 7, 12 & 13 cover the rear lights.
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See sources and related links below to lookup Ford Windstar brake light lamp part numbers by vehicle year.
above brake pedel behind fuse block
brake light bulb out
The battery group is 65N for a 2003 Ford Windstar
If the red " BRAKE " light in your dash is on that indicates that either your parking brake / emergency brake is on , or the BRAKE FLUID LEVEL in your brake master cylinder ( located in the engine compartment ) IS LOW
On a 2003 Ford Windstar : The cargo area is behind the rear seat
According to the Owner Guide , Motorcraft High Performance DOT 3 brake fluid ( DOT 3 brake fluid meeting Ford specification ESA-M6C25-A )
exactly where is of 02 oxigen sensor the ford windstar 2003
2003 Ford Windstar brake light bulb lamp replacement: Purchase the correct replacement brake light bulb(s) first, before disassembling the vehicle. See sources and related links below for replacement brake light bulb information. Then consult your owner's manual for the replacement procedure. As simple as it sounds, the owner's manual is the best place to start for brake light bulb lamp replacement instructions and illustrations. You may want to consider replacing both left and right at the same time in order to keep brightness and color equal (optional).
On a Ford Windstar : I ASSUME since the first model year ( 1995 ) I was looking at the 1996 Ford Winstar Owner Guide and it definately has the high mount stop lamp
In a 2000 Ford Windstar : ( DOT 3 brake fluid meeting Ford specification ESA-M6C25-A ) according to the Owner Guide
there doesnt seem to be a problem with the wiring.