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How to Turn Off Emergency Flashers on Harley-Davidson: Turn Signal Reset & Security Manual
Getting stuck with continuously blinking 4-way hazard lights on your motorcycle can be both frustrating and dangerous, draining your 12V battery and causing confusion for surrounding traffic. Whether triggered accidentally while fumbling with handlebar controls, initiated automatically by the Harley-Davidson Smart Security System (HDSSS), or latched on due to a CAN-bus Body Control Module (BCM) fault, learning how to turn off emergency flashers on Harley Davidson models allows you to resolve the issue in seconds without visiting a dealership. This comprehensive technical guide details the mechanical button combinations, key fob security handshake protocols, PIN override procedures, and electrical diagnostic steps for every Harley generation from classic carbureted models to modern Rushmore and Milwaukee-Eight touring bikes.
The Standard Method: Handlebar Button Combinations by Generation
The method to deactivate 4-way emergency flashers differs based on your Harley-Davidson’s model year and electrical architecture:
1. Can-Bus Milwaukee-Eight & Rushmore Models (2014 – Present)
Modern Harleys equipped with CAN-bus wiring feature an integrated hazard switch on the left handlebar control cluster:
- Ensure the motorcycle ignition is switched to IGNITION (or the keyless Run/Stop switch is set to RUN with the key fob within 3 feet of the motorcycle).
- Locate the dedicated triangle Hazard Switch on the upper portion of the left handlebar controls.
- Press the hazard button firmly once to deactivate the flashers.
- If your specific model does not have a dedicated hazard rocker, press both the Left Turn Signal and Right Turn Signal switches simultaneously and release immediately.
2. Twin Cam Models with BCM or TSSM (2001 – 2013)
On Twin Cam Dyna, Softail, Sportster, and Touring models featuring the Turn Signal Security Module (TSSM):
- Turn the ignition switch to ON.
- Press both the Left Turn Signal button and Right Turn Signal button simultaneously for 1 full second, then release. The flashers will cease blinking immediately.
- If the bike was turned OFF with hazards active (emergency roadside mode), simply turn the ignition switch back to ON and press both turn signal switches simultaneously.
3. Classic Evolution & Early Twin Cam Models (Pre-2001)
Older carbureted models with mechanical flasher relays feature a dedicated toggle or rocker hazard switch located either on the handlebar cluster or along the right side of the inner fairing cap. Toggle the mechanical switch to the OFF position.
When Flashers Won’t Turn Off: The Harley Security System (HDSSS)
If pressing the turn signal buttons fails to extinguish the blinking hazard lights, the cause is almost certainly the Harley-Davidson Smart Security System (HDSSS) entering an alarm or anti-theft lockout state.
Common Security Trigger Causes:
- Dead Key Fob Battery (CR2032): If the coin-cell battery in your keyless fob drops below 2.8V, the motorcycle cannot detect the RF proximity signal, interpreting movement as an active theft attempt and locking on the 4-way flashers with or without siren chirps.
- Transport Mode Activated: If the motorcycle was placed in Transport Mode to prevent motion sensor triggers during trailer towing, cycling the ignition without disarming transport mode will initiate continuous flasher blinking.
- Proximity Interference: Parking directly beneath high-voltage power lines, near cell towers, or keeping your key fob in the same pocket as a smartphone can shield the RFID antenna located under the motorcycle seat.
| Security System State | Visual Indicator | How to Disarm & Turn Off Flashers |
|---|---|---|
| Normal Armed State | Key icon blinks once every 2 seconds | Bring active key fob near bike and turn ignition to RUN |
| Alarm Triggered / Flashing | Hazards flash rapidly, siren sounds | Turn ignition ON with fob present; or enter manual 5-digit PIN |
| Fob Battery Dead | Hazards flash, odometer reads “ENTER PIN” | Execute Left/Right turn signal manual PIN entry sequence |
| Transport Mode Active | Hazards flash 3 times upon ignition cycle | Turn ignition ON with fob present and switch RUN/STOP to RUN |
Step-by-Step Manual 5-Digit PIN Entry Override
If your key fob is lost, broken, or has a dead battery, enter your personal 5-digit security PIN using the turn signal switches:
- Turn the ignition switch to IGNITION. The red key icon will flash rapidly and the odometer will display “ENTER PIN”.
- Press and release the Left Turn Signal switch until the first digit of your PIN appears on the odometer display.
- Press the Right Turn Signal switch once to lock in the first digit and advance to the second digit.
- Repeat the process using the Left Turn Signal switch to select each number and the Right Turn Signal switch to advance through all 5 digits.
- After entering the fifth digit, press the Right Turn Signal switch one final time. The security system will disarm immediately, the red key icon will turn off, and the emergency flashers will stop.
Diagnostic Troubleshooting: BCM, Relays & Ground Faults
If the security system is disarmed and button combinations still fail to shut off the emergency flashers:
1. Sticky or Corroded Handlebar Switch Contacts
Moisture ingress from pressure washing or heavy rain can cause electrical bridging across internal switch contacts. Disassemble the switch housing, inspect for green corrosion, and flush the micro-switches thoroughly with quick-drying electrical contact cleaner.
2. Perform a BCM Hard Reset
CAN-bus Body Control Modules can experience logic lockups after a severe low-voltage event. To reset the BCM:
- With the key fob present, switch the motorcycle ignition to OFF.
- Remove the left side cover and pull the 50A Maxi-Fuse (main fuse).
- Wait 5 full minutes to allow all on-board capacitors to fully discharge.
- Reinsert the 50A Maxi-Fuse firmly into the fuse block and cycle the ignition to RUN.
Frequently Asked Questions (FAQ)
Will leaving emergency flashers on drain my Harley battery?
Yes. Although modern LED turn signals draw minimal amperage, incandescent bulb models draw approximately 4 to 5 amps continuously, which will completely drain a standard 12V 28Ah motorcycle battery in under 5 hours.
What key fob battery does a Harley-Davidson use?
All Harley-Davidson smart security key fobs use a standard CR2032 3-volt lithium coin cell battery. It is highly recommended to replace this battery annually or carry a spare inside your saddlebag.
Why do my hazards turn on automatically when I move the bike in the garage?
The internal motion tilt sensor (accelerometer) inside the TSSM or BCM detected movement while the security system was armed without detecting the key fob nearby. Always bring your key fob into the garage when moving the motorcycle.
Can LED turn signal upgrades cause flashers to malfunction?
Yes. Installing aftermarket LED turn signals without a load equalizer or without performing the BCM learn procedure can cause the module to detect rapid hyper-flashing or latch emergency flashers due to altered circuit resistance.
