Consult your owners manual. Some vehicles do have a separate tank for rear window fluid (usually accessed through the frame of the vehicle with the rear hatch open) and some just pump fluid from the front reservoir to the back window as well.
I believe that the front and rear window fluid are in the same place
The rear window wiper uses the same fluid reservoir as the front, it just has a separate rear window pump attached to the fluid bottle under the hood.
You fill the reservoir under the hood.
Same place as you fill the front washer fluid. There is only one reservoir.
You fill the rear washer same with the front. The reservoir is beside the battery and has 2 pumps, 1 for the front which is the bottom pump and the top is for the rear.
It is pumped in from the front washer reservoir.
front filler does the back as well.
Open the rear liftgate on a Mercury Sable wagon and you will see the rear window washer fluid reservoir fill plug near the bottom of the passenger side tail light
The front and rear washers share the same reservoir, which is located under the hood. It holds a gallon of fluid.
There is only one Windsheild Washer fluid reservoir that serves both the front and back.
Both sets of window washers are fed from the same reservoir under the hood.
under the hood. one reservoir serves both front and rear washers