Question about 2003 Dodge Ram Maxi

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Security light flash no security system on truck

I have a 2002 Ram pickup. got in today went to start truck, started to turn over and shut off.. this red light started flashing. checked the owners manual it is the security light for the alarm . my truck doesn't have an alarm. everything is dead, except for interior lights, but the headlights blink with the key in the ignition and in the start position. disconnected battery let sit 30 min reconnected try too start and the same thing happened but now with the key in the on position alot of the instrument panel lights flash and shut off?


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  • Anonymous Mar 21, 2014

    alarm system light blinks with the key on and the truck is runing

  • Anonymous Mar 31, 2014

    Car starts but then dies after a few seconds security light flashing code p1685 key has no chip what can it be

  • Rj Right May 02, 2014

    It was not the city they were referring to when they said get out of Dodge.

  • Rj Right May 02, 2014

    Add a Commen

  • Rj Right May 02, 2014

    Sorry, was a poor funny joke. To me it sounds like a bad connection at the battery end or the power distribution module (where the fuses and relays are under the hood.) Good the check under it if you can do so as well as the main connections.

  • Rj Right May 02, 2014

    Corroded battery posts reduce cranking amps by 70 to 90%



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You turn your key on for 30 minutes to reset the alarm.

Posted on May 02, 2014

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Sometimes turning the ignition on 3 times quickly without starting will reset the computer. If the van has power locks and keyless entry then try using only the keyless entry. Sometimes your car wont have a alarm but an anti theft device which will not allow it to start if it goes off or something triggers it.

Posted on Jul 26, 2009


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1 Answer

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Sounds like the Remote has Bypassed the Security System and once started, the Immobilizer is then become inoperative seeing that it got it's input from the Remote System itself.

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Here is what I would do... Try your Other Key, if the SECOND KEY works, then your key has failed. If NEITHER KEY works, then your Immobilizer CODE is gone and for some reason as the REMOTE has bypassed the system it is allowing your to operate the truck.

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