https://lci-support-doc.s3.amazonaws...ing_system.pdf
Look on page 7. The schematic shows 2 power wires, one, from the power gear solenoid, which the battery power cable attaches to, goes from there to pin 8 of the controller connector, check for 12VDC there. Also, there is a 6 pin connector as well, which inputs things like parking brake, and 12VDC from ignition. With the key on, check for 12VDC there as well. If you don't have it there, follow the wire until it terminates at a fuse panel or an inline fuse.