Panel lights I changed my battery out and when I started my van all of my panel lights started blinking (rear windshield, air conditioner, ect.).  I checked all of my fuses and they seem to be good.  Any ideas?

check for earth lead at battery is not broken/

(copied and reposted from another person)....I had the same problem you do. What has most likely happened is that the Heater-a/c unit needs to be recalibrated. Here are the steps to do it.
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
1. Set the temp control all the way to cold
2. Set the mode selector to Vent [blowing in your face] so air blows out of the dash panel outlets.
3. Hold down the rear washer button [top left] and the rear wiper button [bottom left] simultaineously for about 5 seconds until most all of the heater and ac panel lights blink and then release both buttons.
6. At this point the system should go into a self calibration test which can take up to 60 seconds. While it is calibrating various control panel switch lights will blink as it goes through it's tests.
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. This sometimes happens with battery replacement. It sometimes takes a couple of tries to calibrate so don't give up if it doesn't work the first time.

This is a common problem on all Astro/Safari vans. The problem is a leak in the vaccum lines that control the vaccum switch responsible for changing air direction from the defrosters, dash vents, floor vents..etc.
Many of the problems that plaque the Astro/Sarfari vans and many other "Mini-Vans" is the build up of excess heat in the engine compartment. It\'s a tight place to put a V6-4.3 Vortec engine and the heat generated bounces back and cooks everything on the engine (coils, modules, sensors, wiring, and of course plastic vaccum hoses). No need to mess with your switches or anything behind the dash -- replace those thin plastic vaccum hoses to operate the vaccum switch (located just below the A/C canisters, to the right of the heater/ac blower housing) and your dash switches will magically send heated or cooled air where you want it.

Take it to a garage and ask them to clear the codes.Take it back to the person who put a diagnostic scanner on it that will clear the codes.

Sounds like its gone into programming mode. All you need to do is start your van. (if you are unsure what knob or lever is which I am looking in the manual for proper terms) Then slide your temp lever all the way to the left (full cold). Then turn the Mode Control to 'panel' (the one that sends air to your face only). Then turn the 'blower switch' to all the way to full. Now go to the leftmost three buttons. Press the top one (rear wiper on constant) and the bottom one (rear wiper washer fluid). Hold these two for a few seconds. Once the lights come on solid then begin to flash you can let go. The AC will now calibrate. You will feel the air blow out of all the different zones at different intervals and see lights come on and go off. Then after a minute or two the top bottn you pressed will be slowly flashing. This means it has been completed (I actually let it run for 5 more minutes just in case something else started blinking). Press the last flashing button and you are done.

check the filters located behind a panel in the back of the glove box they should be cleaned at least once a year. if not plugged then check to see if the switch is changing from panel to floor to defrost ect. could be this selector switch.

check the battery and check the altinator to make sure its charging correctly. your local advance or autozone store will do this for free. as far as the rear air coming on, I suspect the rear blower motor resistor

reset your computer, do this by removing thepositive battery cable for 10 mins.......

if this doe snot work, then some thing went bad when the van was jumped.

hi to get the lights to stop flashing this is with you have to do he reason they are on is beacuse the battery has been removed at one time ok this is the was to get them to stop flashing. first start the vanthen slide the temputer lever all the way to the right then set the mode control to panel (this is the mode that send air to your face)then put the fan speed to full power now go to the leftmost three buttons press the top one(rear wiper on constant) and the bottom one(rear wiper hold thest for a few seconds once the lights come on solid then begin to flash you can let go. the ac will now calibrate you will feel air blow out of all the vents at different intervals and see lights come on and off then after a minute or two the top button you pressed will be slowly flashing this means it has been completed but let it run for a few minutes more to make sure nothing els flashes then press the last flashing button then your done if you need more help email me [email protected]

On most vehicles with front and rear A/C, the two systems are basically independant of each other just sharing the compressor and condensor. It is possible that the Mode Door (controls where the air flow is sent; ie: windshield, vents, floor) is out of adjustment or sticking.