Chrysler Repair: lights blinking for heat and rear wiper, grand caravan sport, dodge grand caravan sport

Question
lights blink on heat & rear wiper on my 1998 dodge grand caravan sport any idea what it could be

Answer
Hi David,
It appears that you may have interrupted a self-test/calibration of the ac/heater system. I would start the test and then see what happens. The interpretation of the flashing lights covers about 6 pages in the manual which is better shared by xerox copy and postal mail. But give this a try,
Starting the tests is fairly straight forward, but following up on any faults requires further action/interprestation of the way the lights are flashing at the conclusion of the first test. All the possibilities cover about 6+ pages in the manual.
But let us give it a try. The engine must be running. Set the blower on HIGH, set mode to the PANEL position, open all AC outlets, Set temperature slide pot(s) to COLD, Depress WASH and REAR WIPER simultaneously for 5 seconds (Until all LED's light). The LED's will stay on for 5 seconds. Calibration tests are running when the rear wiper and intermittent are alternatively flashing. Cooldown test is running when the A/C and recirc lights are flashing.
Acceptable result is when the rear wiper only LED is flashing.
Push rear wiper button to exit.
Interpretation of codes (presumably stored if you don't get the above result) is an involved process for which it would be better to xerox copy and postal mail you the pages.
So see whether your unit seems to behave according to what I have described, and please let me know if you have a heat only system. Look carefully at the name associated with whatever lights are flashing at the end. The interpretation depends on exactly how you describe the lights (accurately).
Roland
PS Use the thank/rate tab to get back to me with the results without having to wait for me to be 'available' to take a question. There is a space for comments to which I will reply.

Hi David,
If you can describe the flashings I will try to give you an answer so you don't have to take a chance on a manual that may not have it.
Thanks for the nomination.
Roland