Power Steering Oil Pressure Switch

Disconnect power steering oil pressure switch harness connector.
Check resistance between switch terminals.

Resistance:
When power steering not used [1] no continuity.
When power steering activated [2] [3] 0.45 Ohms.

[1] With low pump pressure, (steering held in a neutral position).
[2] With raised pump pressure, (steering held to a "lock position").
[3] Approximately.