I have an older 1993 Mitsubishi Triton ute. The issue is that the reverse lights are always on while the car is running regardless of gear position. The gearbox works, that is to say that the car drives fine.
I have replaced the switch that plugs into the gearbox to check the reverse position with a new genuine one from Mitsubishi. (Which cost way more than I thought it would)
The new switch turns off the lights when pushed down and when let up the lights come back on. (Tested before plugging into the gearbox) This seems backwards to me but that is how it is.
I have checked fuses. I have checked the wiring to the best of my capability.
Since the gearbox seems fine otherwise I am reluctant to think that something might be broken inside it but what else is there?