2019 Freightliner Cascadia Trailer Light Fuse Location Page

Finding the trailer light fuse location on a 2019 Freightliner Cascadia can be tricky because the "New Cascadia" model (P4) transitioned many traditional fuse functions into advanced computer modules. Primary Fuse Locations

1. Trailer light socket: This is the connector that links the truck to the trailer's lighting system.
2. Trailer light wiring harness: This is the set of wires that carries power from the truck to the trailer lights.
3. Fuse or circuit breaker: This is the protective device that interrupts the electrical circuit in case of an overload or short circuit.

Appearance: Often a black or red box located near the steering rod or washer reservoir. Power Distribution Module (PDM): 2019 freightliner cascadia trailer light fuse location

• Look for: "TRLR RUN," "TRLR MARKER," or "TRAILER PARK."
• Typical Location: Often found in the upper rows of the fuse box.
• Common Fuse Number: F25 (20 Amp Yellow) or F24 (Check your specific diagram to confirm).
• Note: This circuit is often linked to the truck's marker light fuse. If the truck markers are out too, check the "MARKER" fuse for the truck itself.

Behind the Glove Box (SAM Cab): Most interior and some exterior-linked fuses are here. You'll typically need a T-25 Torx driver to remove four screws and pull the glove box out to reveal the module. A diagram is usually printed on the underside of the dash cover. Finding the trailer light fuse location on a

Trailer Light Fuse Identification: The fuse for the trailer lights is often labeled as "Trailer Lights" or with a specific code related to lighting. If you're unsure, consulting a wiring diagram or reaching out to a Freightliner dealership can provide clarity. Trailer light socket: This is the connector that

SAM Chassis (Engine Compartment): This module is located on the driver's side firewall under the hood. It contains electronic controls for most chassis electrical systems.

The trailer light fuse on the 2019 Freightliner Cascadia is located in the fuse box, which is typically situated in one of the following locations: