Car: 2000 Honda civic EX sedan.

3 days ago i noticed that the climate indicators ( amber/green LED's; not the back-lighting used at night) were flickering bright-half-bright-half at about 2HZ. I saw else ware that corrosion can cause this so I took it apart and cleaned the board. same thing. also it appears i have lost my air mix and vent motor control. blower works normaly as does AC.

I don't know if it's related, but when i turn it's key on engine off, my licence plate lights only are 1/2 dim. they come on full brightness when turn on the headlights and turn complete off with the key off.

is it possible that these share a ground and that's loose? if the climate lights were random flickering i could buy that but it's very consistent.

 

What specific lights are flickering? Post a video.

 

 

Are the LEDs aftermarket?

 

Turn the headlight switch and see if it does the same thing

 

no. everything is stock.

turning the headlight switch to either position doesn't affect this at all.

 

I wonder if it's related to the heater control panel self diagnosis function.

 

I thought I heard the motor moving the flaps in the video, I could be half deaf.....

 

I don't think so b/c it does it as soon as i turn on the ignition. As in the video, all 3 are doing it together, not just recirculate.

That was the recirculate motor. I was showing it happens on all 3 lights yet they still function normal.

 

My guess would be that the heater control panel is bad, causing the self-diagnosis system to be stuck on and shorting the button lights together. Did you recently modify or work on the heater control panel? Any recent electrical problems or work?

Try replacing the heater control panel or borrowing a known good one.

 

yea im guessing the "brain" part with the ***** is bad. I have a replacement being sent to me now. no i didn't mod or work on the ac or heater. only things i did related to this were remove it to install a dual din headunit (DVD receiver) and drained, changed thermostat, flushed, and refiled with new coolant.

 

My whole heater/ac panel turns on and off (nighttime lights).It's a little bothersome but them flickering would bother me more,especially in the daytime

 

I discovered this evening that, I was wrong. Turning on the headlights or running lights stops the blinking and they go dim as they should. I can adjust the brightness like normal. Nothing appears wrong with the rheostat.

If i adjust the brightness rheostat with the headlight switch off, I can control the speed of the blinking; from about .5 hz to almost solid with some flutter flickering.

 

i solved my problem.

As in my DIY for 01-05 cruse control not working with LED taillights found here. I've found out that there's nothing wrong with any part. The logic is relying on the filament of the bulb to pull it to ground, in this case, to make the climate lights bright.

Since i replaced only the non dimming lights to LED, the only path it had was though the rheostat to ground. That caused the flashing and caused my licence plate lights to be dim. i replaced one of my licence plate lights with a 194 bulb and instantly the flashing stopped. so if i want to go led, all i got to do is put a bypass resistor (or hidden bulb) across to make the climate unit happy.

 

No mention in your thread about the aftermarket LEDs.