Turn Signals don't work?

[dmtunc99]

My signals had worked fine since I've had the car, but I took it to a shop to get a cat put on it, and now my turn signals don't work since I got it back. I have no clue how they could have gotten messed up there, so that probably is just coincidental. Where should I begin to fix this problem. I already checked fuses, not blown. Thanks

 

[Defiant]

Well, check your bulbs first. Make sure they're not 180° out in the sockets, and check for corrosion.

 

[dmtunc99]

Well, check your bulbs first. Make sure they're not 180° out in the sockets, and check for corrosion.

Well all of the signals are out, those things seem like they would be individual to a signal.