Pull the panel marked "pull" in front of the passenger seat. Check for any blown fuses related to "Trailer Power" or the "SAM" modules. Passenger-Side Firewall (Under Hood): Open the red PDM box. Look for
Always disconnect your trailer’s 7-way cord before pulling or replacing fuses to prevent voltage spikes. 2019 freightliner cascadia trailer light fuse location
system, which uses Field Effect Transistors (FETs) or bistable relays rather than standard replaceable fuses to protect the circuits. Primary Fuse and Relay Locations Pull the panel marked "pull" in front of the passenger seat
+---------------------------------------+ | Fuse Box | +---------------------------------------+ | Fuse | Fuse Name | Rating | | Number | | | +---------------------------------------+ | 13 | Trailer | 20A | | | Lights (TL) | | +---------------------------------------+ | 14 | Trailer | 20A | | | Lights (TL) | | +---------------------------------------+ Look for Always disconnect your trailer’s 7-way cord