Won't stay running starts and then turns off right after it strats

It started with the left turn signal stay on but would not flash this only happens when I turned on the head lights it worked fine with the lights off. I was also having a problem with the bright lights not working for about a year so when this started to happen I replaced the turn signal switch. Once I replaced the turn signal that's when the starting problem startIng it starts up and then turns right off. Thank you for any help you can give me.