My blinker lights stop blinking and the fuse box doesn't have a cover to show which fuse is which so i do not no which fuse is for the blinker lights.

Hard way , but pull out each fuse , with pointed Nose pliers ( Makes it easy ) and check each fuse , Long way to do it , but needed to find yoiur fault

What kind of car? I have a 2005 Chevy malibu that the light quit blinking, in my case it was the connectors in the bulb socket. Somehow when you remove the old bulb it pushes them back so they no longer connect and the blinker stops working. If this is the case you just need to bend them back but be careful not to break or you can by new outlet assembly for $20. Also the blinkers didn't have a fuse just a relay switch if this goes out you would have problem with multiple lights

if both front and back lights r working its the flashing unit under dash or in fuse box

Sometimes your blinker will stop working if a signal light bulb has burned out. Check your bulbs first. If all the bulbs are ok then check your fuse box for a blown fuse and lastly check the blinker itself in the fusebox. Your owners manual should show you where to find the fusebox and blinker.

It sounds like either the blinker switch witch is in the colume or the flasher witch should be in the fuse box under the dash . Does the blinker lite up but not blink ?

You need a new turn signal flasher.

You need to replace flasher unit. This regulates the flashing speed. Check under the drivers side dash (it may hang amongst wires or in a fuse box) or under bonnet where all the large fuses are (these will be in a covered box). Sounds like under dash because of noise. Google search flasher units to see what the look like.

its the fuse. wen a bulb blinks fast and cuts in and out its the fuse for the blinker. buy it at pep boys or any part place

If you can turn the blinker on left or right and the light comes on but doesn't blink......Open the drivers door, there is a fuse box, On the side of the dash.. The relay willl be a small silver canister looking relay in with the fuses.. put your finger on it and turn the blinker on.. you should feel and hear a click...( With the key in the on position ).. That is what needed replaced if it doesn't keep clicking...Thats the turn signal relay... What makes it blink.......Hope this helps..
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Ok this a way different problem than i thought it was first thing to look at is the relays and fuses and connectors to make sure they are not loose, pull them out and reconnect them. Engine running = vibration. Engine not running = no vibration. If thats good your left light blinker may be shorted to your constant power. Your right blinker may have an intermittent open. I looked at turn signal flashers online they are about $10 each, maybe swap em out then return if it does not fix it. It really sounds like a wiring problem though so look at the back side of where the light is connector and tell me what you find if anything
Good luck