According to the 2010 Ford Explorer Owner Guide the washer fluid for the
liftgate is supplied by the same reservoir as the windshield
Both window washers use the same reservoir, it is under the hood.
To add washer fluid to the rear window washer on a 2010 Dodge Caravan, open the hood and locate the washer fluid reservoir, which is typically near the back of the engine compartment. The reservoir cap is usually marked with a windshield/water symbol. Remove the cap and pour the washer fluid into the reservoir until it reaches the recommended level, then replace the cap securely.
Dirty Jobs - 2005 High-Rise Window Washer 5-12 was released on: USA: 13 October 2009 Australia: 17 February 2010
The 2010 Ford Explorer has a V6 engine.
The 2010 Ford Explorer has 12 valves.
Night Window - 2010 was released on: USA: 2010
The 2010 Ford Explorer has a 5-speed automatic.
The 2010 Ford Explorer is a gas-powered vehicle.
If it's the same as other Foresters there is only one tank under the hood which feeds both front and back washers.
Is it a new or an old window unit? Assuming your looking to refill it I will assume it is an old window unit which most likely uses R-22 refrigerant. R-22 is an ozone depleting refrigerant that is being phased out but should be available until 2010. There should be a label on the window unit stating which refrigerant is used.
Deep Space Explorer - 2010 was released on: USA: 11 October 2010
How do I install passenger side mirror 2010 Ford Explorer