Component Tests: Notes

NOTE: For wiring circuit information, see WIRING DIAGRAMS . Some wires have been assigned a superscript to distinguish them from other wires of the same color. For example, Yellow/Green(1) wire is not the same as Yellow/Green(2) wire.

NOTE: For more extensive cooling fan system testing procedures, see appropriate MANUAL A/C-HEATING SYSTEMS article.

Some models use 2 fan switches to operate engine cooling fans. Some models use one fan switch to operate engine cooling fans. Some models use Engine Coolant Temperature (ECT) sensor and engine oil temperature sensor to operate engine cooling fans. Some models also use a radiator fan control module. See WIRING DIAGRAMS for component usage and locations.