Question about 1998 Dodge Caravan

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I recently had all the control panel lights blinking in my caravan and re calibrated it by holding the rear wiper buttons and letting it do it's thing. That worked to make them stop blinking. Well, now the lights don't blink, but the ac will not stay on ''recirculate mode''. It keeps blowing from the floor or defrost vents. I also followed the directions in the owner's manual to make it come on in recirculate mode as opposed to outside air mode, but I still have the problem.

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  • campbell_ste Jul 11, 2009

    none now. the ac, recirculate, defrost, and rear window wiper and wiper wash lights wear on. It should be noted that the air worked fine before, outside of the lights blinking.

  • campbell_ste Jul 11, 2009

    none now. the ac, recirculate, defrost, and rear window wiper and wiper
    wash lights wear on. It should be noted that the air worked fine
    before, outside of the lights blinking.

  • campbell_ste Jul 11, 2009

    none now. the ac, recirculate, defrost, and rear window wiper and wiper wash lights wear on. It should be noted that the air worked fine before, outside of the lights blinking.

  • campbell_ste Jul 13, 2009

    I did as you suggested. It didn't help. Any more suggestions? the local mechanic that just changed my oil and gave me an estimate on a an obviouly unrelated muffler/exhaust project told me when I asked him that there was some kind a relay or modual of somekind controlling air flow that is malfunctioning, hence the need for it to be reset(as indicated by the flashing lights to begin with). Then when I reset it back to normal parameters by doing what I did with the buttons, it returned to having the problem that caused it to be outside the parameters of normal funtion to begin with and said eventually the lights will start flashing again to give me that " warning" again.

    Hope that info helps. If not, disregard all that and tell me what else you think!

    -Steve.

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  • Master
  • 1,011 Answers

Hello this is what i would like you to try.take both off you battery cables off and then hold them together. FOR MINUETS I know this sounds dumb but trust me on this .By doing this procedure this will reset the computers to there original values including the body control module which is responsible for your ac unit control.Please give this a try it should work and you have nothing to lose except for not have the right time on your radio and channels :)

Posted on Jul 13, 2009

  • mike loshbough
    mike loshbough Jul 16, 2009

    When the lights flash this is sending a code . So when you go through the check it will flash so many times at you the code needs to be deciphered.From a dealership

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  • Master
  • 784 Answers

I believe that you remove the ground cable from the battery over night then put it back up in the morning, to discharge all capacitor leading to bad logic control since the problem at first place. Then your problem will be reset as normal. Cheers.

Posted on Jul 11, 2009

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  • Dodge Master
  • 81,400 Answers

What light is blinking? ac control panel?

Posted on Jul 11, 2009

  • Marvin
    Marvin Jul 11, 2009

    this sounds like a probelm with the body control module try disconnecting the battery negative cable for 5 minutes to reset it, and let me know what happens, all the functions you mentioned go through the BCM.

  • Marvin
    Marvin Jul 13, 2009

    i hink you need to replace the control head.

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1 Answer

I have a 1997 plymouth grand voyager. Everything was working fine until my battery died. Replaced battery & now my rear window wiper lights on the dash blink constantly. The wipers work fine when I cut...


What has most likely happened is that the Heater-a/c unit needs to be recalibrated and here are the steps to do so.
With the engine running and fully warmed up, A/C has to be turned off for at least 5 minutes [don't turn it on at all] and transmission in Park do the following
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7. When the system is done calibrating then just the rear wiper light should be flashing and you can exit the test by turning off the vehicle. Wait about 10 seconds and restart the engine and it should be fine. If both the rear wiper and intermittent light are both still flashing after the calibration then there is most likely a problem with the system that will need more diagnosing. I see this fairly often with battery replacements so I think you'll be ok. It sometimes takes a couple of tries to calibrate so don't give up if it doesn't work the first time. Good luck, hope this helps!

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With ignition on but not running
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1 Answer

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1 Answer

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Hold the rear wiper button and the rear wiper wash buton for like 4-5 sec and it will start its calibration i think you need the blower on hi and the temperature knob at cold

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2 Answers

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The procedure for re-setting the HVAC control panel on a 1998 Dodge Grand Caravan follows:
With ignition on but not running
1. turn knob to air vents
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