This is the guideline to DIY replace all the bulbs in Toyota Vios’s AC panel. Read the tips before you get started!
Bulb size that required: Bulb size for AC panel: T4.2
AC Panel bulb replacement
Before we get started, turn the temperature knob switch to OFF, fan speed to ‘0’ and leg air con controller to only air con (basically everything turned OFF).
Remove 3 pins from each side starting from the bottom to top; you may need to apply some force to pull it out in your first attempt.
There are clips behind every dial; you may need a small screwdriver to make it out. An alternate way to remove them, push the dials from the side as shown in the picture below, either push from the left or vice versa.
I shall start from air-con speed dial on the left side first.
Remove the cable connector by pressing the middle and pull it out as shown on below.
Continue to remove the next cable behind which controls the internal and external air. Use a screwdriver or your car key to push into the arrow direction as shown on picture.
Once it is being removed, you can spot the bulb straight away. Use a flat head screwdriver and turn it anti-clockwise to loosen the bulb and remove it. Be sure to plug the 1st cable you removed at the start to test whether the LED is working before you reassemble it back!
Turn on your car light will do. Just plug and play, if it doesn’t work, means the positive and negative polarity are placed opposite. Just turn it 180 degrees and test it again.
Moving on to the 2nd dial (leg air con controller), give a gentle press on the arrow pointed part and the cable can be removed easily. Take note DO NOT remove the behind part! And make sure it is turned to the left end before you continue to next step.
Push out the clips from all 4 sides using a screwdriver. Try not to damage or break it.
Once it is removed, you should see the gears and the bulb. Now here is the tricky part, look closely to the gears, you should notice that there is a ‘V’ shape in both gears, be sure they are at the same line when you reassemble it.
Now, remove the 4 clips around it with finger nail as highlighted in the picture. After it is removed, you will be able to reach the bulb and remove it. Do remember to connect the cable to test the LED before reassemble.
Now comes the last temperature dial, removing the cable is just the same way as previous dial, gently push down the button and release it as shown on the picture.
4 pins, 1 in each side, remove all of them and the black and white plastic will be separated as shown below. You can actually see the bulb and the gear too.
Again, make sure both gears are in the same line under ‘V’ marking; also ensure that the temperature is set to OFF.
Remove 4 clips all around each sides and both base will be separated. Turn it around and you will the bulb right below it. Test it out before you reassemble.
All done! The Toyota Vios AC panel is shine bright like a diamond~
- Mark a small note on the T4.2 base for easy reference; at least you know which side it is when you want to rotate the LED if it doesn’t light up.
- If the LED doesn’t light up in both directions after you swap, which means the metal piece is not in contact with the copper circuit. You may use a screwdriver and push out the wire so that the wire has bigger contact point.
- If you want to purchase a T5 LED, make sure you purchase those with a plastic leg and the shape is same as T5 bulb. The type I bought could not fit in nicely and it can move easily, I couldn’t tighten it even after pushing it fully in. They do not share the same shape and design.
Credit this DIY article and photos to Henry 217
Checkout the another article from Henry about replacing the Gear’s bulb at here: http://www.carreviewsncare.com/do-it-yourself-replacement-for-toyota-vios-gear-panel-bulb/
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