Overdrive light and Reverse light problems

[RangerDanger94]

I am helping my dad work on his 1996 4.0 Ranger automatic and all of the sudden the overdrive light and reverse lights do not work. We have checked all of the fuses and wiring, but still can't figure out what is wrong. We are probably missing something obvious, but a second opinion would be helpful. If anyone has any idea on what would be wrong, it would be much appreciated.

Thanks,
Jeremiah B.