Headlights causing issues with brake lights...

Cloudboy

New Member
Jul 17, 2022
1
0
1
18
Afton, VA
Hello everyone! Currently, I have reached a problem with my '66 Coupe build. In short, my brake lights won't turn on with the headlights on (Both pressing the brake and just normal running). Turn signals work with the headlights on just fine though. Brake lights and turn signals work with the headlights off, which is what brought me here for help. I also don't have any gauge lighting other than the signals and the highbeam on switch. (Headlights work obviously, just to help a bit more.)
 

7991LXnSHO

wanna catch the space herp
10 Year Member
Sep 1, 2010
7,381
3,084
194
Kearney, NE
Do the brake lights light up without the headlights?
The ground is always the first place to start on vintage cars. If that’s not the solution, I’d be checking the headlight switch and a wiring diagram for your car.