Located on the driver-side firewall under the hood.

The 7-way trailer plug on the back of the Cascadia is exposed to road salt, rain, and dirt. Open the plastic spring door on the trailer cord receptacle. Look for green crusties (copper oxide). Corrosion causes a short that will blow your or F31/F32 (Turn signals) instantly.

Look for a small red or black power distribution box. This often contains major power fuses, including those for the SAM Chassis which controls exterior trailer power.