If you’ve ever found yourself frustrated by turn signal problems, you’re not alone. The infamous “turn signal works sometimes” issue can be both puzzling and potentially dangerous. In this guide, we’ll explore common turn signal problems and how you can diagnose and fix them. Whether you’re a beginner or an automotive enthusiast, understanding these basics can save you time, money, and ensure your safety on the road.
One Turn Signal Doesn’t Work
Is your turn signal acting up, working only occasionally? You’re experiencing one of the most prevalent issues with this system. Let’s break down the steps to troubleshoot this problem:
- Check the Bulb: Access the bulb through the engine compartment, trunk, or lens removal. For guidance, consult your car’s repair manual. If it’s a two-filament bulb, inspect both filaments for quality and check if the glass has darkened. Replace if needed, ensuring the replacement matches the wattage.
- Inspect the Bulb Socket: Examine the bulb socket for damage or corrosion.
- Check Power Connections: Ensure power connections and the socket ground are intact.
One Side of Turn Signal Won’t Work
If only one side of your turn signal isn’t functioning, issues with wires, flasher relay, bulbs, switches, or connectors might be the culprit. Follow these steps:
- Check Bulbs: Verify the bulbs are in good condition with no damaged filaments or darkened areas.
- Examine Wires: Inspect wires for damage, wear, or corrosion.
- Flasher Relay: Investigate the flasher relay as explained in the “Raptured Flasher Module” section.
- Test Voltage: Use a digital multimeter or test light to check the voltage between the faulty turn signal and the signal switch.
- Check Continuity: As a last resort, check continuity between wires starting from the flasher relay to the turn signal switch.
Turn Signal Not Working But Hazards Do
If your turn signal works sporadically while hazards don’t, a broken hazard lights flasher might be the issue. Ensure the flasher unit and fuse are okay. Look for wiring damage or short circuits that could disrupt the circuit connecting the signal switch to the flasher unit.
Fast Clicking Turn Signal
Inconsistent flashing rates can stem from using incorrect bulbs or an alternator overcharging or undercharging the battery. Also, consider poor power or ground connections and loose connections in the signal switch.
Broken Turn Signal Lights
Moving from “turn signal works sometimes” to not working at all signals a deeper issue. Blown fuses, faulty turn signal switches, or bad flasher units are potential culprits. Inspect bulbs, look for damage or corrosion, and ensure proper ground connections.
Dashboard Turn Indicators Don’t Work
If your dashboard indicators are illuminated but not flashing, a faulty flasher unit might be at play. For non-functioning signal lights, check bulbs, inspect for damage or corrosion, and ensure a good ground connection.
Turn Signal Works But Turn Indicators Don’t
When exterior lights function, but dashboard indicators don’t, consider factors like bad grounds, corroded bulb sockets, blown indicator bulbs, a faulty flasher unit, or a faulty dashboard PCB.
Turn Signal Doesn’t Turn Off
This issue requires in-depth troubleshooting. Use a service manual to guide you through the process, which involves identifying wires, testing connections, and working with the turn signal switch.
Turn Signal Repair Cost
Fixing a broken turn signal is vital for safety and legal reasons. It impacts state inspections and reduces your vehicle’s value. While costs vary, expect installation charges around $70 to $100, with parts adding $200 to $300. Total replacement costs range from $270 to $400.
Precautions When Fixing the Turn Signal
Always use the right parts and bulbs, matching part numbers in your owner’s manual. Grease in bulb sockets prevents water damage, so avoid wiping it away. Incorrect bulbs can cause issues, impacting the entire system.
Remember, if you’re not comfortable handling these repairs yourself, consult a professional mechanic. Proper diagnosis and repairs ensure your safety on the road and prevent larger expenses down the line.
