There are no headlamp washers on the American Focus ST's.
The 2002 Ford Focus windshield washer tank is held in place by four retaining bolts. Remove the retaining bolts and the windshield washer hose. Reverse the process to install the new windshield washer tank.
take it to a trained mechanic?
If you're talking about a Focus, there is a panel in the trunk area.
The windshield washer bottle, on a Ford focus, can be located in the engine compartment. The container is near the front of the engine compartment on the drivers side.
change it from the inside
You change them from the INSIDE.
Mine is by the windshield washer.
You can not replace it unless it's an old ford focus.
look under the hood behind the light,There is a clip that holds the bulb in
According to the 2007 Ford Focus Owner Guide : The windshield washer fluid reservoir holds ( 5.1 U.S. quarts , so 163.2 ounces )
for 2008 + Model according to Ford Focus Owners Manual Page 247 the main windscreen washer bottle capacity is 2.0L
the washer jug is under the hood on the right sideclose to the batery the washer jug is under the hood on the right sideclose to the batery