<!-- from fixya rte -->Where is the power steering pressure switch - 2005 Dodge Neon SXT

This car have 3 associated power switch for the power steering
power steering pressure switch. (Idle) speed power steering Cut-Out Switch and (Idle) pressure switch. Please check them.

Good Luck

Power steering pressure switch is shaped somewhat like a spark plug (a bit too fat) threaded at one end and having a cylindrical plastic body at other end. It is on the hose connecting the power steering pump with the rack and pinion.

I don't believe that power steering pressure switch is an actual part for 1991 Geo Storm.

REMOVAL

1. Disconnect negative battery cable.
2. Remove sight shield.
3. Remove module bracket.
4. Disconnect No. 6 spark plug wire to prevent damage to wire.
5. Remove radiator fan shroud assembly.
6. Remove top RH isolated radiator mount bracket.
7. Remove remote air cleaner.
8. Remove ignition coil.
9. Disconnect electrical connector on power steering pressure switch at steering gear.
10. Remove pressure switch to allow for tool clearance.
11. Remove screw at pressure switch and return line bracket.
12. Remove anti rattle clips from power steering lines.
13. Remove plastic strap attaching steering gear heat shield to power steering return line.
14. Remove plastic strap attaching lines to transfer tube on the steering gear.
15. Disconnect Electronic Vacuum Regulator (EVR) valve wire.
16. Remove the ground wire from back of engine block.
17. Remove pressure line fitting at power steering pump using a 5/8 inch flare nut wrench.
18. Loosen clamp and remove return line at pump.
19. Loosen clamps and remove return line at power steering oil cooler.
20. Remove pressure line fitting (gold in color) at steering gear, using an 18mm open end wrench.
21. Remove return line fitting (silver in color) at steering gear, using an 18mm open end wrench.
22. Loosen two screws retaining power steering oil cooler to sub frame.

The Power Steering pressure switch is mounted in the pressure line between the steering gear and the power steering pump.

Good Luck

code po551 is power steering pressure switch circuit failure.

Hopfully this will be ALL you need Besides Pulley REMOVAL TOOL It can be Rented @ AutoZONE

REMOVAL

1. Remove drive belt.
2. Raise vehicle on hoist. WARNING: TURN AIR SUSPENSION SWITCH (LOCATED IN LUGGAGE COMPARTMENT) OFF TO PREVENT VEHICLE DAMAGE OR PERSONAL INJURY.
3. Remove power steering pressure hose bracket.
4. Disconnect electrical connector at power steering control valve actuator.
   1. Install Steering Pump Pulley Remover T69L-10300-B on the pulley hub. CAUTION: Do not apply in-and-out pressure on the power steering pump shaft. Pressure will damage the internal thrust areas.
   2. Hold the small hex-head and rotate the tool nut counterclockwise to remove the power steering pump pulley.
   3. Disconnect power steering pressure hose at power steering pump and drain fluid into a container.
   4. Disconnect power steering return hose at power steering pump and drain fluid into a container.
   5. Remove four retaining bolts and power steering pump and power steering pump pulley assembly.
   6. Remove power steering pressure switch from pump.
   INSTALLATION
   
   1. Position the power steering pump on the mounting bosses of engine block and install the bolts at the side of the power steering pump. Tighten to 20-30 Nm (15-22 ft. lbs.).
   2. Connect the power steering reservoir pump hose to the power steering pump and reposition the hose clamp to power steering pump inlet fitting.
   3. Replace power steering pressure hose O-ring.
   4. Install the power steering pressure hose to the power steering pump fitting. Tighten the tube nut with a tube nut wrench rather than with an open-end wrench. Tighten to 34-46 Nm (26-33 ft. lbs.). NOTE: Swivel or end play of the power steering pressure hose end is normal and does not indicate a loose fitting.
   5. Place the power steering pump pulley on the power steering pump shaft and install Power Steering Pump Pulley Replacer T91P-3A733-A. The small diameter threads on the tool should be engaged in the power steering pump shaft. CAUTION: Do not apply in and out pressure on the shaft. Pressure will damage the internal rotating group.
   6. Hold the small hex-head and rotate the tool nut clockwise to install the power steering pump pulley on the shaft. CAUTION: Do not apply in and out pressure on the shaft. Pressure will damage the internal rotating group. NOTE: The power steering pump pulley face must be flush within 0.25 mm (0.010 inch) of the end of the pump shaft.
   7. Remove the Power Steering Pump Pulley Replacer T91P-3A733-A.
   8. Remove the shipping tube nut from power steering pump housing prior to installation.
   9. Connect electrical connector to power steering control valve actuator.
   1. Install power steering pressure hose bracket.
   1. Lower the vehicle.
   2. If equipped, turn the air suspension ON.
   3. Install drive belt on the power steering pump pulley.
   4. Fill the power steering pump reservoir with Power Steering Fluid Motorcraft MERCON(r) ATF.

From the Factory Service Manual, you can get one relatively cheap from www.promanuals.net. Here is a link to your 2004 Dodge Ram Service Manual.

The power steering pressure switch is installed in
the power steering high-pressure hose (Fig. 9).

(1) Disconnect electrical connector from power
steering pressure switch.
(2) Place a small container or shop towel beneath
switch to collect any excess fluid.
(3) Remove switch. Use back-up wrench on power
steering line to prevent line bending.

The power steering pressure switch as its called threads in to the power steering pressure hose most of the time it is close to the power steering pump, I have also seen them at the lower point of the pressure hose close to the rack and pinion.