Question about 2004 Ford F150

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Alarm goes off truck won't start.

Tried to start my truck (2004, F150 Lariat, 5.4 Ltr) the alarm started going off and it will not start. Diconnected the battery and then reconnected. Alarm started going off when I reconnected the battery. ignition was off during this time. There is a small light at bottom of front console on drivers side that has started flashing.

Any help would be appreciated.

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  • ivawan Jan 18, 2009

    I more or less have the same type of problem. I have a 04 F150 FX4, I disconnected the battery to clean the posts and when I reconnected the positive cable the vehicle alarm would sound for about three minutes, stop for a few seconds and start again, when I disconnected the postive cable the horn would stop and the process would continue. The truck would not start at any time. I started the truck with the booster eliminator keeping the cables fully connected. I'ts been three days since this incident and have had no problems since. ( I don't know if this would have any bearing, but last week I required a battery boost from another vehicle and when I tryed to start my vehicle with the dead battery the same situation with the horn sounding occurred, is there a possibility that the dead battery may have effected the vehicle alarm system. I do have the in-dash alarm cancellation button, this had no effect.Help please. Suggestions appreciated.


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You got to press the lock or unlock button on the remote a couple times my truck did the same thing.

Posted on Jan 21, 2009

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Sounds like you have an aftermarket alarm not factory most of these alarma are equipped with a starter interupt that will not vehicle start. when connecting the battery ist is normal for the alarm to sound some alarms may not sound if ignition is on while connecting battery, however this is not reccomended. after connecting battery and alarm sounds you should be able to turn it off with trasmitter, if you do not have one then you will need to put key in ignition turn it on and look under the dash for a valet switch or togle switch this may override the alarm and let car start if you cannot locate this you can alway locate the alarm box under dash and unplug it as last resort most alarm defaults will let the car start when this is done. hope this helps

Posted on Nov 18, 2008

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