22 Cascadia Utility Light Wiring

You may be better off building your own circuit.
That light should go through the Ssam and if it detects too large of an amp draw, then it will shut the circuit down.
The wires will run under the driver side sill plate.

 

It would be easier to add new wiring directly off the battery and a key fob on off relay to turn them on/off

Freightliner wires are the size of pubic hairs, they re not deisgned to handle anything more than what came out the factory.

 

The plastic Pete I drove for a very short time had a check engine light problem.
Turns out somebody put some back up lights and the computer in the truck knew that their was something pulling more juice on the circuit.
Cut the wire the check engine light went out.