V0RT3X

Haha, oopss, I did not use that much resistance. You asked for 43Ohm, i used 47, for 130Ohm, i used 140 something, for 420, i used 470. Something like that. I could not find the exact value you asked for.

I will PM you

engifineer

For the parts you just ordered, I will just throw in some resistors for this one when I ship... dont want you going lightless in the near future :D

V0RT3X

So what is the exact voltage and current draw for PLCC ?? Usually I use 3.4V and 30mA whenever I need to calculate the resistor value. Most of the time, to avoid installing resistors, I just connect 4 of them in series. Is that ok ?

engifineer

It is usually not a good practice to run without limiting resistors. 20mA usually the safe limit, but you wont see much difference in brightness over about 16 (most change is going downward from there). I usually calculate using 3.2V and 15mA if I want them bright. The actual forward drop will vary slightly at different current levels, but that is a pretty safe value.

bn1987

where can i buy this light for my car?

engifineer

pm sent!

Tagnal

I was thinking about doing this mod to my car, but I have an '07. My current HVAC is working just fine. But, I was wondering if anyone knows if the '08 HVAC unit will work just fine in an '07 car. If so, I was thinking of picking up an '08 board from a salvage yard and doing the mod on that and slipping it in the car instead of modding the '07 board. Does that sound reasonable?

SquallLHeart

yup.

where are you at btw?

Tagnal

San Jose too

crex149

I have a question for anyone about the LCD on the HVAC. I just did a swap to blue on all of my gauges and everything worked fine. The only problem(s) I ran into were on the LCD. I can not get the blue leds to light. I first thought I had one on wrong, but they were all correct. I redid the solder on all 3 and still no change. I re-installed the original leds and it worked. Even tried switching them one at a time and as soon as I would swap any one of them, they would all stop working. I have not done the resistor changes yet as they were not available at the time, and I may not even do them, as the buttons are bright enough for me as is. Anyone have any clue as to what may be happening?

Oh, the other problem... I managed to crack the damn LCD, ehich just topped off tonights install. Anyone have an extra?

engifineer

You will need to purchase an HVAC to replace the LCD unless someone just happens to have an extra. Look for a used one (car-part.com is a great place to look).. since a new one is over 500 bucks.

The leds under the LCD may not light up at all without the resistor and regulator fix. I cant imagine the buttons being bright enough for anyone without that mod either. Before I came up with the mod, some that had tried the led swap actually swapped them back because they were so dim.

But either way, the LCD backlighting is probably going to be the worst of the bunch and may or may not light at all without the mod.

LEDeZ

I have a 08 tc, and i'm having a hard time putting the climate control **** back together. There are a total of 3 pieces and i don't know which came first.

engifineer

The clear portion slides onto the potentiometer. The metallic parts snaps over it. If you look around the edge of the **** face you will see 3 holes. Those snap over three tabs on the clear part. Just line up the hole for the indicator light over the raised part of the clear **** and snap together.

ESEMRFOZZ13

i read page one, and im one of those with a burnt out hvac light. do they just get replaced l.e.d's or is it more critical.

engifineer

https://www.scionlife.com/forums/sho...%2Bissue%2Bfix

should take care of it if it is the common 07 issue