HVAC Display question
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Joined: Oct 2014
Posts: 77
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HVAC Display question
I have the dual climate controls on my 99. When I turn the headlights on I do not have any lights behind the buttons of the control panel except the AUTO button. It illuminates fine. The digital display works fine as I can read the temp, modes, fan speed, etc. other than the backlights, it works great. I pulled the codes and I do not have any codes. Is this problem the same as the dimming display I have read about on other threads? Do the eight small resistors need To be soldered as in the dimming problem? Any advice or knowledge on the subject will be appreciated. Thanks
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
Look at posts about the same issue under my name. Somebody posted a schematic to trace down the problem.
I fixed my dim display a ways back (yours is not the 8 resistors), somehow dropped my unit after soldering (doh!), and now my back lighting doesn't work. I'll probably wait until I park it for winter...
I fixed my dim display a ways back (yours is not the 8 resistors), somehow dropped my unit after soldering (doh!), and now my back lighting doesn't work. I'll probably wait until I park it for winter...
Drifting
Joined: Jun 2013
Posts: 1,296
Likes: 368
From: Iowa
If your display works fine and the auto button works fine then I'm guessing the lights behind each of the other buttons burnt out or possibly the electrical pathway that powers those lights was severed. I'll let more of the electrical genius' reply whether they think it's the bulbs themselves or something else.
Thread Starter
Advanced
Joined: Oct 2014
Posts: 77
Likes: 5
If your display works fine and the auto button works fine then I'm guessing the lights behind each of the other buttons burnt out or possibly the electrical pathway that powers those lights was severed. I'll let more of the electrical genius' reply whether they think it's the bulbs themselves or something else.
Drifting
Joined: Jun 2013
Posts: 1,296
Likes: 368
From: Iowa
If you're up to it maybe take off the radio bezel and remove the HVAC unit. Unplug/replug it in and see if that fixes it. If not maybe take it apart and see if there are any bad welds or if the circuitry looks like it's damaged?
Race Director
Joined: May 2003
Posts: 14,137
Likes: 2,985
From: Iowa
St. Jude Donor '03 thru '26
I had this guy replace my lights and fix the dim screen.
http://www.davescorvetteillumination...O_REMOVAL.html
http://www.davescorvetteillumination...O_REMOVAL.html
Last edited by knewblewkorvette; Jun 29, 2016 at 11:54 AM.
Melting Slicks
Joined: Jul 2004
Posts: 3,294
Likes: 482
From: Brea CA
99.9% sure all of the lights behind the buttons need to be replaced. There are 14 soldered in lights behind the buttons and temp *****.
If you have done the dim display fix you can replace the lights.
Here is one source for the lights:
http://www.mcmaster.com/#1505k414/=e7c5hm
Radio Shack if they still exist where you are may also have them. You are looking for a 7219 lamp.
Gary
If you have done the dim display fix you can replace the lights.
Here is one source for the lights:
http://www.mcmaster.com/#1505k414/=e7c5hm
Radio Shack if they still exist where you are may also have them. You are looking for a 7219 lamp.
Gary
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Le Mans Master
Joined: May 2006
Posts: 6,774
Likes: 363
From: Midland TX
I had this guy replace my lights and fix the dim screen.
http://www.davescorvetteillumination...O_REMOVAL.html
http://www.davescorvetteillumination...O_REMOVAL.html