1995-1999 Manual Climate Control LED

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This is a how-to to change the current lights int he manual climate control. This application is for 95-99 Maxima's but might work also for other max's and cars.

 

Disclaimer: I am not responsible for whatever happens to you or your vehicle. Use of this document is for educational purposes only.

Difficulty:

Easy to moderate.
Knowledge of LED's + Resistors
Experience with soldering recommended

Items needed:

Small flat head screw driver
Small Phillips screwdriver
3mm + 5mm leds ( around 10-15, more just incase they blow or just don't' work) I get mine off eBay from the user ctwick or something.
Sand paper (fine grit 500-1000)

He ships them from hong kong and it's free shipping. I paid 9 dollars for 25 blue and 25 white leds. Nice and bright and they come with free resistors too!

Soldering Iron (small tip preferred) 10-15 dollars from radio shack
Soldering braid 99 cents from radio shack (use to suck up excess solder)
Tweezers
Scissors
Electrical tape

Manual Climate Control

Here's the assembly taken out. It's pretty simple. If you've ever installed an aftermarket stereo, it's the same exact procedure except you take out the climate control instead of the head unit. I won't explain on how to take it out, I assume you do already so just take the thing out and bring it inside.

First thing to do is to pry out the buttons on the front of the unit. Use a small flat head and pry out the pieces from the side. Pry out all of the buttons (a/c, faces/ turn knob/slider)

After removing the buttons, turn it around and remove the back piece of the assembly. Should be pretty easy, just look on the sides for wedges and just push in or whatever and pry it out.

This is how it should look like. So far it's pretty easy.

Now remove the connections on the bottom over here to the circuit board in the picture below. (the white plug with the black wires coming out) Just take plyers or use your fingers to unplug it.

Now to remove the top circuit board we need to squeeze these plastic pieces in with either pliers or tweezers. Just squeeze them and pull at the board. There's three of them so just squeeze and pull at all of them and the board should come loose. Look on the side of the assembly to see if the side of the top circuit board has wedges that are attached on the plastic housing. Use a screw driver and push those out also until it comes out. The top board is connected to the bottom board so don't use too much force!

After you have successfully got the board loose, start to work on the turn knob thingie. Make sure the front knob is taken off or it won't come out easy.

To remove the turn dial look on the sides of the assembly again and look for the wedges that are stuck to it. I believe there are three of them. Just use a small flat head and poke at it until it becomes free from the housing. Do it until you can pull the knob part out.

After getting the knob part out, you will need to remove two screws on the bottom board.

One on the left side.

And one on the top right of the board.

After removing these you will need to look to the sides again to poke at any wedges such as these shown on the bottom

It's pretty tricky to get it out but just work at it little by little and it should eventually come out.

Here's how the bottom board looks like.

(note: these are leds installed on already, the old LED's are green which are in the middle row and are 3mm in size)

You will also see around the board 3 bulbs which are in some sort of blue cover.

We will start with the row of 3MM LED's.

Before you start installing the LEDs. I used a fine grit sand paper 1000grit to roughly sand all the leds so the light will not seem blotchy at times and help disperse the light.

Turn the board over to locate the lead points. They're the third pair from the bottom that are relatively close to each other smack dab in the middle row of the board.

Fire up your soldering iron and heat up the contacts while pulling to get the LED's out. (REMEMBER! Look at the old LED's to keep track of the POS+NEG sides, I usually pull all but one out to use as a guide for replacing the LED's). After pull them out, just replace them with your new 3mm led's and solder down the connections. You can bring the board back to your car and plug it in to see if it works. Now to move on to the LED bulbs that are in the blue cover. I used a 5mm size for these but you can use 3mm if you wish also. Use a Philips or flat head on the back to unscrew the housing from holes of the board. Using your tweezers, pull out the LED leads from the back and pull out the led from the housing. Start marking your LED/Resistors.

This is how I made mine. I put the LED resistor next to the bulbs and had the end of the resistor come down. Of course cut the excess lead off and electrical tape the connecting part of the resistor. (not shown here)

You will now want to put the led back into the old housing the old bulbs were in and wrap the LED leads around the end of the housing where the old bulb leads used to be and look visually to see if any leads are touching each other. This part will be a bitch because the LED leads aren't as flexible as the old bulb leads. Just do your best with your tweezers.

(IMPORTANT: if you're using a 5MM led you would put the housing back into the hole first THEN stick the LED into the housing from the other side of the board because if you stick the LED into the housing first then try to screw it back on, the LED will be too big to fit into the hole)

Pic of LED's installed (note that the resistors are on the side of the LED)

You can go to your car and plug it in and test to see if it works. if it doesn't light up, it means the polarity is wrong, simple fix: just unscrew the housing and turn it 180 degrees and screw it on again, your LED should light up and you will receive a warm feeling inside.

Repeat and rinse for the other two. Don't' forget that you will want to change your A/C light! Look at the assembly and you will see a black lil encasement where the white connector stems from.

Remove the screws and you will see a small circuit board. There should a wedge on the side of the assembly holding it down. Fiddle with that and remove the board.

You will see the LED on the other side. Now that you're a expert and removing and replacing LED's, this should be a simple job. REMEMBER! look at the old led to remember the polarity before you start removing it. You will need a 3mm led for this one. After replacing it, reassemble the unit backwards from the way you took it apart. (slider board/bottom board/knob thingy/top board/back black plastic piece)

The plastic glass pieces in the bottom of the assembly might have gotten loose when you took the bottom board apart. Make sure to put them back where they are before putting the boards back. Replacing the bottom board will probably be the hardest. Make sure your LED's are straight and not crooked. No resistors are sticking out and what not. Just put everything back together slowly, don't force anything. Remember the screws and the connector

After putting it back together, take it out to your car, plug in everything and see if the LED's light up.

To test the a/c you will need to have to push in the a/c button while the knob is on. If everything looks good, put back all the buttons and finish reassembling the unit if you haven't done also already. If not, take it back apart to see if a housing got loose or if some connections are touching. Other than that you should be all set.

Finished Pics