There is a problem that can exist on Mopars with the integreated hazard switch. It happened on my 70RR "way back" in the 70's and it happened to two other guys who came into the Miramar Navy auto hobby shop. I "fixed" them by moving a wire on the TS switch which DISABLES the hazard circuit
The current flow into and out of the "black box" that is your TS switch is simple.........you have switched brake power going into the switch, and with the switch centered, that power goes out to both left and right lamps. You can check that down at the kick panel connector. As above^^ suspect and check both sides of the TS switch connector.
