Turn Signals & Components

Turn Signals & Components

This collection supports the Electrical system by covering the signaling subsystem used to indicate driver intent during lane changes or turns. Turn signal systems control the directional flashing of front and rear lights so other drivers can see the vehicle’s intended movement.

This category applies to 1932-1972 Passenger, 1939-1970 Mercury, 1932-1979 Pick Up vehicles.

The turn signal system is built around a steering column switch that directs electrical current through the vehicle’s lighting circuits. When the driver moves the turn signal lever, the switch routes power through a flasher unit that produces the repeating on-off cycle required for signaling. The signal is then carried through the vehicle harness to the front and rear lights on the selected side.

This collection includes the mechanical and electrical components that allow that sequence to function correctly. Turn signal switches, canceling cams, lever assemblies, and extension pieces control the driver interface at the steering column. Flashers and flasher harnesses regulate the pulsing signal. Wiring components such as turn signal switch harnesses, front turn signal harnesses, and directional signal wires distribute the electrical current to the lighting system.

Service parts such as canceling cam repair kits, gaskets, and light inserts support restoration work where wear or age has affected switch operation or light sealing.

Most turn signal problems trace back to worn switches, damaged wiring, or a failing flasher unit.

Technical & Fitment Section

Turn signal systems function by routing electrical current through a switching mechanism that alternates power between the left and right lighting circuits. The steering column turn signal switch acts as the central control point. When the driver moves the lever, the switch redirects power through the flasher unit and into the selected side of the lighting system.

The flasher creates the rhythmic interruption in current that causes the lights to blink. Flasher units connect through flasher sockets or a flasher harness depending on vehicle configuration.

Mechanical components inside the steering column help return the signal lever to the neutral position once the steering wheel rotates back after a turn. This function relies on a turn signal canceling cam. When worn, the lever may fail to return automatically.

Electrical distribution continues through the front turn signal harness and directional wiring that routes the signal to front and rear lights. For vehicles originally built without integrated turn signals, universal switch kits and wiring sets provide a complete external control system.

Fitment will vary by model year.

Review the switch, flasher, and directional wiring together when diagnosing turn signal system faults.