weird blinking lights

[grandse]

Help please. My battery was dead in my '98 caravan so I had to jump start it. Ever since then my rear wiper, AC and recuirculate light blink. It's a constant blinking and in rythem. Everything works it's just I can't tell when it's on. The defrosters works, however the light will not come on. Is there a breaker that needs to be reset or a certain starting procedure for the computer to relearn? There is not anything in my manual about this. Thank you for the help.

[jagplates]

When you have a dead battery, it screws up the calibration of the A/C control system. (For some reason, disconnecting the battery usually does not cause the problem, but a low or dead battery does.)
In order to recalibrate, this is the process for a 1998:

CALIBRATION/DIAGNOSTICS TEST ENTRY
TO INITIATE TESTS:

* Set Blower motor ON HIGH
* Set Mode position to Panel
* Open all A/C outlets
* Set Temperature to Cold (Both slide pots if equipped)
* Depress WASH and REAR WIPER button simultaneously for 5 Seconds (Until all LED's light)

RESULTS:

* All LED's will turn on for 5 Seconds
* Calibration Test is running when REAR WIPER and INTERMITTENT are alternately flashing. Cool-down test is running if A/C and RECIRC are alternately flashing.
* Acceptable result is REAR WIPER LED is the only LED flashing. Push Rear Wiper to exit.

That should do it. If not, post again and we will try to help.

[jagplates]

Also. I believe the calibration should be done with the engine running. The manual doesn't say that, but since the calibration involves things that can only work with the A/C going, I'm pretty sure that you have to do it with the engine running.

[grandse]

That did the trick. I don't know how to thank you.

[ksflatfoot]

I just experienced the exact same thing today with my 98 Caravan. The battery, apparently the factory original, crapped out. I needed a jump start to get me home. Those weird lights were blinking all the way. I removed the battery and replaced with a new one. I thought that would be it, but spent until after dark trying to figure out why those lights on the ac/recirc/rear wiper and rear wiper delay were all still blinking. I finally decided to visit this site which has helped several times before. I was relieved to see this post and the instructions for the fix. I think I'll go outside and see if I can make it work for me too. I appreciate this help very much! Thanks
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I just got back inside after doing the calibration/diagnostic thing. It seemed to work, but I now have the a/c and recirc light flashing simultainiously. I came back inside to print off the instructions and will go back out and try again. Past my bed time by a long shot, but I am anxious to see if I can get resolution tonight.
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Well,well,well, I did it. Knowledge is POWER and I have it tonight! It is 11:00 pm and I don't care if I have to get up at "dark thirty" in the morning. At least I can drive to work without a light show taking me back to the disco days. Thanks jagplates and thank you grandse for posting your note which provided me with some resolution to this meanacing problem.