Would a failing alternator trigger the o/d off light?
- ErikLv 74 weeks ago
No, those two things are unrelated.
- thebax2006Lv 74 weeks ago
No it wouldn't. Vehicles with overdrive use the O/D light to signal that there is a problem with the transmission control system. Go to the dealer and they will scan your vehicle with their factory scan tool to read the transmission codes and read the tranny data to make sure all the sensor and solenoids are working within spec. transmission shops tend to just upsell folks a rebuilt transmission rather then fix the actual problem.
- champerLv 74 weeks ago
Any problem with the power supply can trigger all sorts of electrical nonsenses including spurious warning lights. I'd doubt if it would set off just one warning though. It's worth having your alternator tested if you've got any doubts. Then you can rule it out (or in).