theft light blinking when car is off. I’ve learned the blinking light of a car with a key in it is the anti theft. The vehicle is an older ford windstar van. I've had the car a little over a week, and only yesterday noticed the theft deterrent (engine immobilizer) light continues to flash, even if the car is unlocked. Insert the key in the ignition slot and turn it to the right only slightly. I just wanted to see if everyone's theft light flashes like it is supposed to, or if some have no light when the car is off. If this is some other type of light then disconnect your battery (negative first then positive) for 30 minutes and reconnect in reverse order (positive then negative). A car's anti-theft system may activate if your key fob battery is dead and hasn't disabled the system. 4) Look at the Theft light on the dash, the theft light will be blinking rapidly... approximately 3 blinks per second, indicating theft. The light only blinks when the engine is turned off and the car is locked. try disconnecting the battery for 15 minutes. Some anti-theft lights blink by default ( a small red light near the dash, for example is there to warn off thieves ). Car in OFF position - 2011 Ford Fusion Keep it in that position for 10 minutes or a little more. Anyway parent's 2000 Taurus SEL Sedan has its anti-theft light blinking while the car is off. The "Passive Anti-theft light" or PATS will flash once every 2-3 seconds when the vehicle is off and the system is working normally. It does not have keyless entry. Step 1: Check your key fob battery. If the theft light is flashing rapidly, you have an issue with the alarm system. Car won't start.Theft light blinks,clicking sound under hood and thumping like horn wants to go off.Seems like it's stuck in anti theft mode anti theft light should blink every few seconds. It is likely to turn off the light and start the car. Insert the car key into your car’s ignition and turn it on. 5) After a period of 30-45 Seconds. anti theft light keeps blinking. This should reset the computer. The theft light keeps blinking after I have shut off the vehicle, key is out of ignition, all doors are closed and locked. I don't know the specifics of the alarm system, but I believe its just the factory transmitter etc. turn the key on nothing no lights on dash . Blog. Volusiano wrote:I started noticing today that my security indicator light (page 2-34 of manual, red car icon with key pic inside) is always blinking every 3 seconds now, even when my car is unlocked and turned off, sitting inside my garage, regardless of whether the key fob is nearby or not.I never notice this behavior before when the car was unlocked and turned off. My battery was drained while I was on a long vacation and I’m wondering if the blinking light … (bad key, bad antenae in the key hole, wiring issue) If the car is turning over, but not starting and the theft light is steady, I would check your crankshaft position sensor. This just started yesterday. Apply this trick when you have access to the car’s interior and the ‘Theft System’ light on the dashboard is ON. It seems operate correctly - turns off when the ignition is switched on, stays lit and then flashes when armed after the car is locked. 6) Now, turn the key to the OFF position and remove it from … I read that in the owners manual, but my car never had the flashing light 53,000 miles original owner. The system comes active once you lock the vehicle. February 7, 2021 8:35 am Uncategorized Theft Light will blink slowly and/or go out. Any help would be appreciated. Does anyone know how to disable the blinking theft light or why it is blinking?