Need some turn signal school

There are two wires going to the column for power, one from the brake light switch and one from the signal blinker.
Under normal conditions (no turn) the connection of the brake light power is connected to both rear turn lights.
When you turn on the turn indicator you disengage the brake power from that side and connect the blinker power to both the turn lights on that side.

The turn signal switch is a complicated animal.


Alan