My husband truned the emergncy lights on in our SUV and now we've been having problems with the turn signals ans brake lights not owrking. All the fuses are good and I 've tries using WD40 on the emergncy light switch, nothing's working.

Try turning the emergency flashers on and off 20 or 30 times. See if that helps.

Contacts can get corroded over time. That usually helps in those cases. How old is this vehicle and what make and model?