Most shaking in the steering wheel on ANY vehicle is caused by balance problems. The tire can be out of balance, the wheel can be bent or the axle (half-shaft) can be damaged and out of balance.
According to the 2003 Ford Focus Owner Guide : ( Motorcraft MERCON automatic transmission fluid is used as the power steering fluid )
looking for diagrams,2003 ford steering assemlpy
You can huge amounts of WD-40 to the lock cylinder of your lock key and move your key inside and outside many times while trying to turn your ignition on in order to break free your locked steering wheel of your 2003 Ford Focus.
The 2003 Ford Focus has 16 valves.
2003 ford expodition steering wheel is hard to turn.
Ford focus with 2.0 eng.zetec
The 2003 Ford Focus has an inline 4 engine.
The 2003 Ford Focus is a gas-powered vehicle.
The 2003 Ford Focus has a 5-speed manual.
Mecron ATF is used for the Ford Focus.
The 2003 Ford Focus's turning circle is 34.3 ft..
The 2003 Ford Focus runs on regular unleaded.