Colin,
When I changed out my 4 pin trailer harness to a 7 pin....I had disconnected my battery. After install and backing out of the garage I noticed that my camera guide lines and collision warning were not working. Drove it around the block...next time I started the truck those things were...
Dave (@AzScorpion), does MP2 have a ignition key ring? Did you remember to get it off of MP1?
Dave (@navsnipe), you may need to add that to the "list of things to remove"
Suggested by @GitRDone in a different thread I added these peel and stick Harbor Freight treads to my Step Bars (the peel and stick didn't work too well...so I used contact cement on both the tread and plastic):