Mine is really touchy on the adjustment.
Slightest movement and the reverse lights do not come on.
Move it the other way and the reverse lights work but you have to hold the shifter up to start. I like this position - I call it my anti-theft device -
x2 with John
Red/blue wires together and it's gonna start no matter what so be careful.
Connect the two black wires together and your reverse lights will stay on all the time.
(an old pic a few years back - column to firewall seal was slid all the way back to the switch and not normally in that position)