Turn signal not working or 4 way flasher - 2005 Cadillac CTS

exposition ? Do you mean expedition ? What year ? The turn signal switch could be bad , bad fuse , turn signal flasher would be a likely culprit . hazard light flasher is different from turn signal flasher .

if the hazards flash the problem is not the flasher. Most likley you need a turn signal switch

Check the flasher located in the fuse/relay panel. Also check for a blown fuse as well. Remember this if the 4 way flashers are not working the turn signals will not either. To test the flasher before you remove it, turn the turn signal switch to either side and with your finger touch the top of flasher. If you feel a click from flasher then it's good and you will have another problem in the wiring. Hope this will help you.

Time to change the flasher unit, it's usually close to the drivers side of vehicle and behind a fuse box access panel and will have something like "12v 23/98W " on it. It's a largish cube shaped componant and may be water damaged !

there is a flasher for both 4 way & regular turn signals ( check to make sure the bulbs are good
the backs are easy >>> Just step on the brake, If the lights light up the bulbs are good you my have to remove the bulbs one at a time in the front check your ground wires to the lights if everything is good replace the flasher unit if that fails replace the turn signal switch

You will find that there are two flasher units on the fuse panel. Turn on the four ways to identify which flasher serves that circuit. Then, move the flasher to the other position (where the signal flasher is) Your directionals should then work. You then can buy another flasher and install it when you have a chance, putting it in the 4 way position. The 4 ways get used so infrequently, you always have a reliable spare signal flasher there!

I think that your flasher is bad I believe that the 4-ways flasher is a seperate flasher unit it should be in the fuse box and look like the 4-way flasher , to find the flasher turn on the 4-ways and you can feel it or hear it flashing and lok for the flasher for the turn signals
Mike

The 2 fuses are no 10 (7.5amp) and no 21(15amp) in the interior fuse panel.The flasher is located on the base of steering column under dash. See this this pic find connector c214 on bottom 3rd from right.
http://i253.photobucket.com/albums/hh43/chuck943/EXN15113.gif

Flasher unit is bad. Replace flasher

You May need to replace the turn signal Switch/lever assembly on your car , do the turn signals work at all ? if they don't try the 4 way flasher , if the 4 way flasher's work suspect the turn signal switch .

Hope this helps