2018 · Freightliner · Cascadia · Detroit DD15

2018 Freightliner Cascadia SPN 1487 FMI 2 Intermittent Dash Lights

Intermittent dash and switch illumination flickering with communication fault codes.

1 Verified
3 Suggested
Issue / Concern

My dash lights and switch backlighting have started flickering lately while driving at night. Sometimes the intensity jumps to full bright or goes completely dark for a few seconds. This is throwing SPN 1487 FMI 2 on my diagnostic tool and it is driving me crazy during mountain passes.

Mileage
542,000 mi
Symptoms
None indicated
Tests Performed
None indicated
System
Electrical
DTC Codes
SPN 1487 FMI 2, SPN 639 FMI 2
Keywords
None indicated
Already tried

I checked the fuses in the PDM and tried cleaning the battery terminals to ensure good ground. I also tried swapping the dimmer switch on the dash from a donor truck.

fleet_chief_42165· 131d ago
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1 Verified Repair
  • Rachel Nguyen218· 2d ago
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3 Suggested Repairs
  • turbo_tony206· 78d ago
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  • Jake Morrison210· 3d ago
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  • Sarah Thompson244· 118d ago
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