Interaxle Lock Switch
The interaxle lock switch (see Fig. ) allows the driver to lock the drive axles together.
Fig. 1, Interaxle Lock Switch
When the interaxle lock switch is pressed, three responses are possible:
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Normal Response: The LED in the switch blinks until the interaxle lock is engaged. At this point, the LED illuminates steadily. In normal operation, the interaxle lock may engage so quickly that the blinking of the switch is barely noticeable.
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If engagement of the interaxle lock mechanism is not possible for any reason (ignition is turned off, vehicle is moving too fast, etc.), the LED will stop blinking and turn off.
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Slow Response: If engagement of the interaxle lock mechanism is slowed for any reason (by cold weather, low air pressure, etc.), the switch will continue to blink until the axles lock together, or for a maximum of 10 seconds. As in the normal response, the LED illuminates steadily once the lock mechanism is engaged.
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Abnormal Response: If the LED blinks for more than 30 seconds, the lock mechanism may not be fully engaged/disengaged. Bring the vehicle to an authorized Freightliner service facility for testing.