Hello I'm trying to fix up my grandfather's old 1987 Dodge Dakota which is in pretty good shape overall and only 56k miles except for a couple things like the fuel lines hoses by the gas tank that i replaced, but now I'm having issues with the turn signals. They are working fine blinking and i can hear it click as they turn of and on when i have the headlights turned off but once i turn the headlights on they blinking and clicking that goes with it stops but the lights still turn on. My dad and I have already replaced a couple bulbs and checked the fuses (did have to replace 1) but they pretty much all seemed fine. I don't know what else to try any suggestions. Thanks in advance for any help it is all appreciated.