I just noticed today before I came to work that the passive auto security system light was blinking on the tach. I had to get the owners manual out to figure out what light it was.
Is this normall and I just didn't notice it before? or is it something I need to take care of? the owners manual was unclear in this reguard.
thanks for the help in advance

 

Moving to '2010-2014 Mustang' section, but will leave a link for a few hours . . .

 

If the car alarm is locked/armed then the light will flash.

 

From my 2011 manual:

If a problem occurs with the SecuriLock

system, the indicator will flash

rapidly or glow steadily when the ignition is in the on position. If this

occurs, turn the ignition off then back to on to make sure there was no

electronic interference with the programmed key. If the vehicle doesn’t

start, try to start it with the 2nd programmed key and if successful

contact your authorized dealership for key replacement. If the indicator

still flashes rapidly or glows steadily, the vehicle will not start, contact

your authorized dealer as soon as possible for service.

The armed system will be triggered if:

•

Any door, the hood or the trunk is opened without using the remote

entry transmitter portion of your IKT or key in driver door cylinder.

What triggers an alarm:

The ignition is turned to the on position with an invalid

unprogrammed SecuriLock

key or IKT.

The vehicle is towed/inclined.

Motion is detected in the interior passenger compartment