rear turn signals work but break lights don't

[Slapshot]

Thanks for the replies and suggestions. The dual filament bulbs are working fine with lights/turn/ hazards. Just no brake lights.

Things I will check out
Fuses
Brakes switch at pedal
Turn signal switch
Hazard switch

 

[Slapshot]

On a 1971-1973 the brake signal from the brake switch does NOT go through any Hazard switch contacts. It only goes through the turn signal switch.
I agree that the issue will be found in the turn switch. These are easy to take apart, clean and re-lube.

View attachment 3772482
View attachment 3772491
View attachment 3772493


Note the Brown/Orange jumper wire is what allows the brake signal to go to BOTH rear lights.

@Coolerman , Does the ‘73 with the ignition on the column work the same way? Any clues as to where the point of failure might be?