Look at the firewall (the wall between the engine and the cab) on the driver’s side. You will see a large black plastic box with a grey lid. It usually has two metal release clips on the sides.
Here is a step-by-step guide to finding and identifying the correct fuses. 2019 freightliner cascadia trailer light fuse location
: If a circuit shorts, the SAM module stops sending power. Try cycling the ignition (key off, then back on) after unplugging the trailer to see if the circuit resets itself. Look at the firewall (the wall between the
: In some "New Cascadia" (New Body Style) 2019 models, fuses and relays are integrated into a single module located behind the center dashboard panel , near the floor or cupholders. Additional Power Modules Here is a step-by-step guide to finding and
Depending on the specific lighting issue, you should check these locations: Module Location Specific Identifiers SAM Chassis (Engine Bay) Relay R9 and Fuse 13 Trailer Stop/Tail Trailer PDM / SAM Cabin Varies; check labeling on the lid Trailer Turn Signals SAM Chassis Relays R3 (Left) and R4 (Right) Trailer Auxiliary Power SAM Cabin (Dash) Fuses 61A and 61B Trailer ABS Passenger Side Fuse Box Fuses F43, F25, and F26 Freightliner Cascadia Trailer Light Fuse Location - Q&A