nice job Sam
Lights on climate control stays on.
Thread Starter
Instructor
Joined: Feb 2012
Posts: 126
Likes: 0
From: E PROVIDENCE Rhode Island
Lights on climate control stays on.
The lights on my 99 Coupe climate controls stay on. All other lights dim. What can this be?
Last edited by Dskeys63; Dec 30, 2015 at 08:46 PM.
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
I worked on two of those exact same issues. In both cases it was internal to the HVAC head unit and not the BCM control. If it were the BCM control other lights would be affected.
I have no idea what board is the issue and if it is a common mode failure of a particular part.
Here is how to replace it. If you have a manual shifter you do not need to remove the **** and boot. They can stay in place, just pop the boot loose from the console piece and it can be rotated so the console piece can be lifted off.
http://www.vetteessentials.com/instr...zel_howto.html
Mr. Sam
I have no idea what board is the issue and if it is a common mode failure of a particular part.
Here is how to replace it. If you have a manual shifter you do not need to remove the **** and boot. They can stay in place, just pop the boot loose from the console piece and it can be rotated so the console piece can be lifted off.
http://www.vetteessentials.com/instr...zel_howto.html
Mr. Sam
Cruising
Joined: Jan 2015
Posts: 12
Likes: 0
From: Norman Oklahoma
Is it possible to wire the power to the HVAC to the ignition???
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
I tinkered around with the HVAC controller last night to no avail. I really have no idea why the lights would stay on like this. My only guess is that during the LED soldering process, something went wrong. I had my electronics experts at work take a look and they couldn't see anything wrong with the LEDs though. So, I don't know.
Is it possible to wire the power to the HVAC to the ignition???
Is it possible to wire the power to the HVAC to the ignition???
I came to the same conclusion as Mr Sam ultimately and once the battery is charged fully and the power is recycled a few times the problem goes away. I have not found a wiring diagram for the HVAC display (in my case manual), but am sure there is a relay internal to it that is sticking when the battery reaches a sufficiently low point. Now I just keep a Battery Minder on the car at all times when it isn't driven for more than a week and the problem has not reoccurred.
As most of us have discovered, battery voltage is critical to the health of the electrical system of these cars. Maintaining the battery voltage above 12 volts at all times seems to minimize electrical issues. I am convinced that the plethora of relays in these new 'electronic' cars will ultimately result in their long term demise.
Good luck... GUSTO
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Michael S. Palmer
Cruising
Joined: Jan 2015
Posts: 12
Likes: 0
From: Norman Oklahoma
As others above have mentioned, I have had this problem occur twice now in the past 3-4 years. Battery goes dead over a few days and sure enough the HVAC illumination remaining on seems to be the culprit. The first time I discovered it was by accident, I walked past the car in the garage at night with no garage lights on and saw it was illuminated.
I came to the same conclusion as Mr Sam ultimately and once the battery is charged fully and the power is recycled a few times the problem goes away. I have not found a wiring diagram for the HVAC display (in my case manual), but am sure there is a relay internal to it that is sticking when the battery reaches a sufficiently low point. Now I just keep a Battery Minder on the car at all times when it isn't driven for more than a week and the problem has not reoccurred.
As most of us have discovered, battery voltage is critical to the health of the electrical system of these cars. Maintaining the battery voltage above 12 volts at all times seems to minimize electrical issues. I am convinced that the plethora of relays in these new 'electronic' cars will ultimately result in their long term demise.
Good luck... GUSTO
I came to the same conclusion as Mr Sam ultimately and once the battery is charged fully and the power is recycled a few times the problem goes away. I have not found a wiring diagram for the HVAC display (in my case manual), but am sure there is a relay internal to it that is sticking when the battery reaches a sufficiently low point. Now I just keep a Battery Minder on the car at all times when it isn't driven for more than a week and the problem has not reoccurred.
As most of us have discovered, battery voltage is critical to the health of the electrical system of these cars. Maintaining the battery voltage above 12 volts at all times seems to minimize electrical issues. I am convinced that the plethora of relays in these new 'electronic' cars will ultimately result in their long term demise.
Good luck... GUSTO
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
Thanks for the reply! Man... what a crazy issue. I may start looking for a new used one to swap in. It's a shame because I really like the looks of the current one with green LEDs, but I'm going to have a hard time selling/trading in this car eventually if I don't replace it.
Is your car garage kept? The real nemesis of most relays is their exposure to moisture from any source, including condensation from humidity.
What year is your car? Also which HVAC controller is in your car, the manual single zone or the dual zone with a temp display in the center of it?
GUSTO
Cruising
Joined: Jan 2015
Posts: 12
Likes: 0
From: Norman Oklahoma
Have you been able to get the illumination to turn off at all, or is it remaining on still?
Is your car garage kept? The real nemesis of most relays is their exposure to moisture from any source, including condensation from humidity.
What year is your car? Also which HVAC controller is in your car, the manual single zone or the dual zone with a temp display in the center of it?
GUSTO
Is your car garage kept? The real nemesis of most relays is their exposure to moisture from any source, including condensation from humidity.
What year is your car? Also which HVAC controller is in your car, the manual single zone or the dual zone with a temp display in the center of it?
GUSTO
It's still on.
It's mostly garage kept, but does get daily'd quite often.
2000 with the dual zone w/temp display.
Cruising
Joined: Jan 2015
Posts: 12
Likes: 0
From: Norman Oklahoma
Update: I bought a used HVAC Controller from a local shop here in OKC (American Camaro and Firebird) They sell Camaro, Mustang, Firebird, Corvette parts from scrap cars. Lots of good selection if you ever need anything. Just give them a call and tell them the part you are looking for.
I got a used controller and took the power circuit board from it and connected it to my working lighting board with my LED lights. FINALLY!
It dims and shuts off properly when I shut the car off. Not the cheapest fix in the world by any means ($206), but this appears to be the only way to fix this issue. I was also able to use the newer one's buttons as they look nicer; and I have a spare lighting board just in case. It just needs new bulbs on it, but it was perfectly functioning. I hope this helps someone else out in the future with this issue. It sucked and nearly killed my brand new battery from all the jump starts and slow drains on the battery. What a PITA.
Le Mans Master
Joined: Sep 2003
Posts: 8,812
Likes: 2,029
From: eastern NC
Update: I bought a used HVAC Controller from a local shop here in OKC (American Camaro and Firebird) They sell Camaro, Mustang, Firebird, Corvette parts from scrap cars. Lots of good selection if you ever need anything. Just give them a call and tell them the part you are looking for.
I got a used controller and took the power circuit board from it and connected it to my working lighting board with my LED lights. FINALLY! It dims and shuts off properly when I shut the car off. Not the cheapest fix in the world by any means ($206), but this appears to be the only way to fix this issue. I was also able to use the newer one's buttons as they look nicer; and I have a spare lighting board just in case. It just needs new bulbs on it, but it was perfectly functioning.
I hope this helps someone else out in the future with this issue. It sucked and nearly killed my brand new battery from all the jump starts and slow drains on the battery. What a PITA.
I got a used controller and took the power circuit board from it and connected it to my working lighting board with my LED lights. FINALLY!
It dims and shuts off properly when I shut the car off. Not the cheapest fix in the world by any means ($206), but this appears to be the only way to fix this issue. I was also able to use the newer one's buttons as they look nicer; and I have a spare lighting board just in case. It just needs new bulbs on it, but it was perfectly functioning. I hope this helps someone else out in the future with this issue. It sucked and nearly killed my brand new battery from all the jump starts and slow drains on the battery. What a PITA.
Good luck... GUSTO
Drifting
Joined: May 2008
Posts: 1,695
Likes: 491
From: Denver, NC
Travis at VetteTronics repaired mine for same issue and fixed all lighting at same time for less than buying a second controller. That guy does great work. A short in a component on the power board is what causes that.
Last edited by Ed Ramberger; Jan 18, 2018 at 07:07 PM.
1st Gear
Joined: Apr 2018
Posts: 1
Likes: 0
Hvac lights stay on
I don’t know why this worked.... but my 2000 had hvac lights that would not shut off. I changed the hvac panel. Same thing. Would not shut off. I stumbled upon my traction control switch as the culprit. I do not have the active handling option. But the traction control circuit board has the light bulbs installed for it. Can’t see them unless you take the panel apart at the plug. Anyway I had one burned out bulb. I removed the bulb and now my hvac lighting works perfectly.
Navigator
Joined: May 2022
Posts: 9
Likes: 0
Same issue?
Hi there -
It appears I have the same issues, but with an odd twist. The HVAC lights are not "Always" on... when driving if the rest of the dash and interior lighting is off, the HVAC is as well, but when I turn the car off, the HVAC lights turn on.... Thoughts?
Thanks-
DDegree
It appears I have the same issues, but with an odd twist. The HVAC lights are not "Always" on... when driving if the rest of the dash and interior lighting is off, the HVAC is as well, but when I turn the car off, the HVAC lights turn on.... Thoughts?
Thanks-
DDegree