Troubleshooting Issues
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      MKII - MirrorEye System does not Start

      Truck ignition is ON, all monitors are displaying a black screen with no backlight.

       Symptoms and perceived side effects 

      Truck ignition is ON, other accessories and the instrument cluster are working as expected, but all monitors are displaying a black screen and backlight is OFF

      Troubleshooting and possible resolution steps

      1. Turn ignition OFF, wait for system to power down completely (wait 2 minutes for power down).
      2. Check if monitors connections are properly connected
        1. Disconnect and reconnect and listen for a "click" to ensure properly connected
      3. Turn ignition ON and check to see if screens turn on correctly. 
      4. If the black screen issue persists, then perform the following diagnostic tests:
        1. Check the vehicles battery condition and connections per OE guidelines. (MirrorEye voltage requirement is minimum 10V)
        2. Check system fuses for the KL30 (power) wire, and the KL15 (ignition) wire that connects to MKII system. If the fuses are faulty, replace the fuses and verify with a key cycle if system power is restored.
        3. Using a Digital Volt Ohm Meter (DVOM) to check KL31 (grounding) 1-5Ω – If MKII harness is a DTNA Prewired option, a dedicated ground wire is connected at the firewall Ground Stud)
        4. Ensure that ECU connector is properly seated and connected, a click sound can be heard when the connector is fully seated.
        5. With a DVOM set to DC, remove the ECU connector and check the voltage on the top row (KL30 [1] and KL15 [3] to Chassis Ground). (Battery voltage readings are expected.)
                                         
      5. Ensure there are no pinched/ bent / damaged wires or loose connection. If damaged wires were detected, contact customer service for additional support. 
                                              
      6. If the issue persists, Contact the MirrorEye Technical support team by calling 888-624-4474

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      Published  12/2025   Revised  xx/xxxx