My car is a 2.5 L automatic and i dont think overdrive works. My button on the shifter wont light up the light on the dash when un-pressed. also, when im going like 45, it wond down shift when i un-push the button. it could be the button itself or a fuse, because my e-brake light doesnt work, the fog lights dont work(under hood fuse good), and cruse doesnt work. The reason I think it doesnt go into overdrive is because it is at like 3500 rpms at like 55-60 mph. is this normal? also, i can tell the shift from 1st to 2nd, and 2nd to 3rd, but 3rd to 4th is a very small shift, like maybe 500-700 rpms? is my overdrive not working?

 

Sounds like it ... Check the Reverse lights ... No reverse light check the fuse