1 problem or 2?

Good morning, or maybe not. Seeking info and direction for 2 problems that presented themself this am:
#1 D032P code which according to the scanner is knock sensor. Where should I start and which wire lumens should I concentrate my inspections?

#2 In addition to the check engine light thetraction control light is on solid and 4LO and VSC lights are flashing. Trans won’t shift above 4th gear.

Alittle background is I installed a 50a fuse block directly from batt, thru a 100a batt switch to control my acc lights, etc. I didn’t tap into any wires but I did pull it thru the grommet on driver side above the pkg brake. When I completed the install of the rear lights they didn’t work but I haven’t had time to trouble shoot the problem.

thanks in advance for any help!

 

Trac and Vsc will come on with CEL. Must be in limp mode. Check the knock sensor.

 

Check wiring at the firewall behind the engine for the rodent special.