SAM Cab Fault

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The Cascadia electrical system has an emergency power circuit that supplies battery power for exterior lighting. This assists vehicle visibility in the event a MEGA fuse is open circuit. The emergency power circuit is live even when the CLDS is turned off.

The emergency power supply feature allows for the vehicle to be driven off the highway and for the exterior lighting to remain on in the event of a SAM Cab or SAM Chassis failure. The emergency power supply will cause certain exterior lamps to flash (depending on if it is the SAM Cab or SAM Chassis that failed), indicating that the vehicle is disabled.

If the emergency power supply system activates, do not shut down the engine until the vehicle is in a safe position to do so. It will not be able to be restarted until the problem is corrected. If emergency power mode is due to a SAM Cab fault, the gauges will become unresponsive but the engine will remain running until it is turned off.

When the ignition is in the ON position, the emergency power supply will cause the following lamps to flash:

  • dash panel lights

  • clearance lights

  • front marker lights

  • side marker lights

  • trailer taillights

  • rear stop lights

Note:
Parent topic: Emergency Power Supply
Document Number: 0000111662
Manual Publication Date: 2025-02-11
Topic Publication Date: 2024-05-06