When turn signals stop working but emergency lights don’t, it’s often ignored. This electrical issue can confuse other drivers and cause accidents. Diagnosing the wiring can fix it.
Your emergency lights and turn signals may run on different fuses or circuits. If one fails and the other works, a fuse, relay, or switch issue is likely.
Stay tuned to learn how to troubleshoot the issue.
Common Causes
Turn signals and emergency flashers often share bulbs but differ in wiring and controls. If only one system fails, likely causes include:
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Blown turn signal fuse
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Faulty turn signal switch
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Defective flasher relay
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Damaged wiring
The emergency flasher often uses a separate relay or circuit path.
Diagnosis Steps
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Check fuses: Use a multimeter or visual inspection
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Swap relays: Test turn signal and hazard relays
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Test switch: If the switch is broken, neither left nor right signals will activate
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Inspect wiring: Look for corrosion, frays, or disconnected wires
If all components seem fine, deeper electrical diagnosis is required.
Can You Still Drive?
Driving without working turn signals is illegal in most places. While emergency lights provide some notification, they cannot replace signals for safe lane changes or turns.
Cost of Repair
Basic fixes like fuse replacement cost under $10. If a flasher relay or switch is involved, expect $50–$150. Electrical repairs may rise if deep wiring issues exist.
Summary
Emergency lights working doesn’t mean all is well—fix the signals before it leads to confusion or fines.
