Left turn signal flashes fast on dash. Front light flashes normally, rear light wont flash at all. switched bulbs with right rear and got the same results. Looked for a relay to replace but couldn't find one. Any ideas where the flasher relay could be?

The flasher is under the dash.If you turn on the signal listen for it's location.Turn on your 4 way flasher and see if the left rear light is flashing.If it's not then replace the bulb.If it still does'nt work after replacing the bulb check if there is power to the socket. Use a probe light.If no power to the socket.There is a break in the wire or worse the signal switch may be the culprit

The flasher unit for the four ways is separate from the turn signal.
If the rear light is flashing fast means the front light is malfunctioning. Check all wiring from the dash to the light itself. I had one a wire was pinched and had broken

Take the bulbs out and see what it does.

not enogh infrmation

You most likely have a bad bulb, if the front bulb goes the rear wont work and vise versa both bulbs must be good to complete the cirrcut. Even though you have no lights you should still hear the flasher relay. Bulbs are cheap just replace both and you'll be good to go. Good luck

Replace the burned out bulb. It is flashing fast to alert you that bulb is burnt out. Turn on the side that works properly & note all bulbs flashing in front, rear & side. Most likely there is at least 1 burnt out on the other side.

as for the faster flashing thats as simple as a blown bulb, replace the bulb and see if that fixes the problem, it may fix the lot because the other symptoms you mention are a bad connection, if bulb is fine check the connection isnt loose or corroded over. if it is simply file it back to establish better connectivity,

the right rear is burnt out so a new bulb will fix it

Change the flasher which is located up by fuse block under dash