split second the power jumps in and out

2001 DODGE CARAVAN
115,000 MILES
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MADYSEN2007
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Hi, I have a 2001 Dodge Caravan Sport and when im driving for a split second the power jumps in and out which triggers the auto lights and wind shield wipers to go off and on?

One mechanic thought it was because I need the alarm pad for my keys. I got the light switch changed. When im driving if I got the radio or A/C on, it will all keep going in and out making car jerk in and out.
May 4, 2012 at 6:36 PM
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FIXITMR
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so you have more than 1 ignition key to use?
May 4, 2012 at 8:57 PM
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MADYSEN2007
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No just one for ignition and one for doors.
May 4, 2012 at 9:04 PM
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MADYSEN2007
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However I dnt have the alarm pad that go on the keys.
May 4, 2012 at 9:06 PM
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FIXITMR
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so you cant turn alarm on/off?
May 5, 2012 at 7:20 AM
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MADYSEN2007
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Right!


May 5, 2012 at 11:17 AM
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MADYSEN2007
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I was told to unlock the driver door and that should turn alarm off if that's whats triggering
May 5, 2012 at 11:18 AM
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FIXITMR
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if alarm was on you couldn't start vehicle.
May 7, 2012 at 6:59 PM
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MADYSEN2007
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Oh,ok
May 7, 2012 at 7:37 PM
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MADYSEN2007
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I said alarm cuz the mechanic said it might be some type of anti-theft mechanism that's going off while im driving. Now he saying it might be alternator.
May 7, 2012 at 7:56 PM
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FIXITMR
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could be lots of things including bad ignition switch. alternator can be tested at auto stores. but if it has intermittant problem might not show up.
May 8, 2012 at 11:09 PM