Nissan 27220-40U02 Motor & Fan Assy-Blower

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Begin by disconnecting the cable from the negative terminal of the battery.

Unplug the electrical connector from the blower switch and use an ohmmeter to check for continuity across the indicated switch terminals. If the continuity isn't as specified, it's recommended to replace the switch.

To check the blower resistor for proper operation, probe the wires at the resistor leading from the blower switch. Using an ohmmeter, check for continuity to ground at the resistor electrical connector while the blower switch is rotated through all the switch positions. Continuity to ground should be present at three of the terminals in all switch positions except Off. If a ground signal doesn't exist at the blower resistor connector, you should repair the blower motor switch or the circuit leading to the switch.

Remove the glove compartment and lower dash trim.