Classic Ford Maintenance

Turn Signal Switch Removal & Replacement

Turn Signal Switch Removal & Replacement Guide

Classic Ford Mustang, Falcon, Fairlane, Comet & F-Series Trucks (1960s–1970s)

If your turn signals are acting up—or just plain dead—it’s often the switch inside the column calling it quits. The good news? This is a very doable repair with basic tools and a little patience. Below is a step-by-step guide to replacing classic Ford turn signal switches, including popular part numbers like C3OZ-13341-B, C5OZ-13341-B, C5OZ-13341-HQ, C9TZ-13341-C, and C9TZ-13341-USA.

Why Replace Your Turn Signal Switch?

A worn or failing turn signal switch can cause:

Intermittent or non-functioning signals
Brake light issues
Horn malfunctions (shared circuit in many models)

Replacing it restores proper electrical function and keeps your classic Ford safe—and road legal.

Tools & Prep

Steering wheel puller (TOOL-3600)
Small crescent wrench
Screwdrivers
Dielectric grease
Phone (for reference photos—trust me on this one)

First rule: Disconnect the battery ground cable. Always.

Step-by-Step Removal

1. Remove the Turn Signal Lever

Twist the lever out. If it’s stubborn, use a small crescent wrench on the flat spot found on most originals.

2. Remove Horn Button or Ring

Push down and turn left to release.
⚠️ Go slow—there’s a spring underneath that likes to make a break for freedom.

Inspect horn ring retainer
Remove horn brush if equipped

3. Pull the Steering Wheel

Use your steering wheel puller (TOOL-3600) and set the wheel aside.

4. Document Wiring (Critical Step)

Before disconnecting anything:

Take clear photos of wire routing and colors
Or write them down if you're going old-school

Some 1965+ models use connectors that may require a release tool.

5. Disconnect Wiring Under Dash

Unplug the turn signal switch harness from beneath the dash.

6. Remove the Turn Signal Switch

Back at the column:

Remove the (3) mounting screws ONLY
Do NOT remove the two large nuts (unless you enjoy fishing dropped studs out of a column…)

Carefully pull the switch upward while feeding the wires out of the column.

Installation Process

7. Compare Old vs New Switch

Before installing:

Match wire colors and count
Confirm lever compatibility

8. Install New Switch

Feed wires down through the column
Seat the switch properly
Reinstall the (3) retaining screws

9. Reconnect Wiring

Plug into under-dash harness
Apply dielectric grease to connections for longevity

10. Reassemble Column

Reinstall steering wheel
Install horn brush (if applicable)
Replace spring, horn button/ring
Thread in turn signal lever (don’t over tighten)

Final Check (Moment of Truth)

Reconnect the battery.

Now…

No smoke? Good sign.
No weird noises? Even better.

Turn the key and test:

Turn signals
Brake lights
Horn

If everything works—you nailed it.
If not… well… time to retrace those wiring steps.

Pro Tips from the Shop Floor

Always photograph wiring before disassembly—memory lies, photos don’t
Replace worn horn components while you’re in there
Use dielectric grease to prevent future corrosion issues
Never force the switch or lever during install

Need the Right Turn Signal Switch?

At C&G Ford Parts, we’ve been helping restorers get it right since 1978. Every part we carry is built for proper fitment and factory-correct function—because guessing doesn’t belong in a restoration.

👉 Browse our selection of classic Ford turn signal switches and get your signals back in sync.

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Turn Signal Switch Removal & Replacement