I have a 1999 Jeep Cherokee sport. I have a problem with my turn signals. They don't work. My four way flashers work. I have tried replacing the flasher unit. I used 3 different parts from 3 different stores. The problem exsisted with all 3. I have replaced the turn signal switch and my turn signals worked for about 3 weeks then stopped working again. My high beams work. I am at a loss at what to do. I was told it could be a ground poblem but not sure where to look. Any help that is offered would be greatly apprieciated. I have about two months to get this fixed before state inspection is due.

 

I'm having trouble with my right rear also.
It started working again. I have no clue why.

Does your lights turn on, but not flash? Both front and rear?

 

Check the fuses to see if they are getting power. I had the same problem; I had to remove the fuse box and run a jumper wire from the signal fuse to the flasher relay.

 

i had the same problem.. one problem i had was oldish fuses.. so new fuses all around.. but also.. if one is being difficult.. and only once in a while works.. it is just a loose bulb... at least what was wrong with mine.. even a new bulb didnt want to fit right.. so i put a peice of alum beside bulb when screwing in.. works fine...but might not be the case for you.