well ive been putting it off for a while but im now trying to fix the turn signals on my 1970 chevy c/10 i fixed it but when i turn on the left turn signal all it does is come on it doesnt blink but then i turn the right one on it blinks ive checked the wires, fuses etc.. and i cant seem to find a problem i was just wanting to know if there was like a box that regulates the turn signals i mean ive looked all over the place i just havent seemed to be able to find it
thanks  

Never heard of that problem before, does anyone know what could cause one blinker to work and not another?  

You didn't mention that you checked the bulbs? Useuly when that happens there is a incomepleat sercit,like a bulb burned out or wire shorted or broke.  

yes check bulbs and wireing at bulbs also check blinker relay it may work on one side but maybe not the other  

Maybe go to Custom Classic Trucks web and check out 68 chev turn signal problum. See if that will help  

Yeah maybe mr John G can help you out.  

did you change the blinker relay or the flasher relay? do both the front and rear light come on, but not blink? I would pull the rear light assembly out and make sure it's grounded correctly.  

check the ground wires as well. i have a 70 chevy pickup as well and re-wired everything from under the dash forward