CAUTION: ATF, NOT POWER STEERING FLUID, IS USED IN POWER STEERING
This applies even to our 2007 Corolla.
From 1988 4Runner FSM...
__________________
86 4Runner, 22R-Eliable, 5-Speed Manual, dlx. WHAT'S YOURS?
If you want us to help from afar please let us see, hear, feel what you're dealing with.
A picture paints a thousand words.
Toyota components are bullet-proof. Issues often arise from poor wiring, assembly and/or maintenance. Suspect those first.
Next only to our senses, the multi-meter is the most important electrical diagnostic tool. Spend $6 at Harbor Freight or $$$ blindly replacing parts.