The 2010 Dyna models came with a factory alarm that flashed the signal lights if it was triggered. I paid the HD tax and added the siren unit since flashing turn signal lights by themselves doesn’t add much security.
The alarm system adds some challenges to performing battery maintenance, transportation, and overcoming dead/lost FOB issues (disabling the the alarm to ride).
Disable the Alarm when disconnecting the battery.
1) With the FOB near the bike, turn the ignition switch to on to disable the alarm system.
2) Remove the negative cable from the battery.
It has also been suggested to remove the 40A main fuse before removing the negative lead from the battery. In fact, this is recommended when disconnecting power in a different section of the manual. I see no point in the additional labor for a simple battery removal. The above is straight from the owner’s manual.
This is described as disarming the motion detection but allowing the alarm to trigger if an attempt to is made to start the engine. It is safer and works better than tying the FOB to the motorcycle when transporting long distances.
1) With the FOB in range, turn the ignition switch to on.
2) Set the engine stop switch to off.
3) Turn the ignition switch to ACC.
Within 5 seconds, press both the left and right turn signals at the same time (turn signals flash once).
4) Turn ignition switch to off (turn signals flash 3 times).
To return to normal operation:
With FOB in range, turn switch to ignition and and set the engine stop switch to run.
Disabling the Alarm System to Ride
This method assumes that you are going to ride the motorcycle and the steps must be repeated after the ignition switch is turned off.
This requires that you know the security system PIN.
You must keep the FOB away from the motorcycle.
If you screw up entering the PIN, wait more than 2 minutes before attempting the next try.
1) Turn the ignition switch to ignition.
2) Within 2 seconds, hold both turn signal switched in until confirmation on the dashboard.
3) Enter the PIN by toggling the left turn signal switch to the proper number on the dash, and using the right turn signal switch to advance to the following digits.
4) After the 5th digit has been entered, press the right turn signal switch one more time. The key icon on the dash should stop blinking.
Again, once the ignition switch is turned off, the alarm system will turn back on.