Radiator Fan System: Inspection: Notes

CAUTION:

Be careful not to let your hands or other objects get caught in the rotating parts.
Since some of the power supply circuits are shared with other system, check such system other than the radiator fan system for faulty conditions before proceeding any further.
Since more than one faulty conditions may occur simultaneously, once work is done perform "Basic Inspection of Radiator Fan System" to confirm that the system is working properly.
Since battery discharge may occur, charge the battery as necessary. Ref. to STARTING/CHARGING SYSTEMS (H4DO)>BATTERY>CHARGE .
Use the check board when measuring the ECM terminal voltage and resistance. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>GENERAL DESCRIPTION>PREPARATION TOOL>HOW TO USE CHECK BOARD .