Use ONLY PS fluid recommended for Ford, available at Wal*Mart and Auto Zone and Pep Boys',, for example.
According to the 2003 Ford Focus Owner Guide : ( Motorcraft MERCON automatic transmission fluid is used as the power steering fluid )
the reason it foamed up is because air got in there, which means that you have a leak some where
My experience has been..... if water ..even just condensation gets into the power steering box it will turn a bit whitish and foamy... Mike in Tucson
Mecron ATF is used for the Ford Focus.
The power steering fluid reservoir is by the firewall towards the passenger side of the engine
Power steering should never go down unless there is a leak found in the system. Therefore, you generally would not need to top up your brake fluid on a ford Focus.
The power steering reservoir can be located on the right-hand side of the engine, near the back. The cap will be labeled as power steering fluid only.
power steering fluid is fluid that makes the power steering pump work and it goes in the power steering pump under the hood.
The power steering fluid recommended is Mopar
Remove the plug on the bottom of the power steering fluid pump. Drain the power steering fluid out. Replace the plug to the bottom of the power steering pump. Replace the power steering fluid.
Power steering fluidPower steering fluid
power steering fluid grade