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Old 01-28-2013, 09:17 AM   #291
Franktea
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Re: Interior Switches' LED conversion

Hi, changed all the lights to LEDs about two months ago, now three of them on the dash started flickering, is it possible they have a loose connection? anyone had the same issue with solution?
Thanks,
Frank
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Old 01-28-2013, 09:30 AM   #292
cdepuydt
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Re: Interior Switches' LED conversion

Quote:
Originally Posted by Franktea View Post
Hi, changed all the lights to LEDs about two months ago, now three of them on the dash started flickering, is it possible they have a loose connection? anyone had the same issue with solution?
Thanks,
Frank
I have the same sort of problem with the OFF button on my climate control. I changed my whole dash out with LED bulbs. All the bulbs worked fine for a while. Then, one day, I noticed the OFF button was not illuminated. Then a few days later it was working. Then, a few days later it wasn't.

I had to take the dash apart for another project I was doing, so I took the bulbs out of the climate control switches, switched them around and, lo and behold, all of them were working. I put everything back together and everything worked fine for a couple of weeks, then the same thing started happening with the same switch. The bulb would work, then wouldn't, then quit working altogether.

Next time I need to take the dash cover off, I am going to take that bulb out and put some dielectric grease on the contacts of that bulb and see if that does anything.
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Old 01-28-2013, 10:50 AM   #293
IanRTL
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Re: Interior Switches' LED conversion

Quote:
Originally Posted by cdepuydt View Post
I have the same sort of problem with the OFF button on my climate control. I changed my whole dash out with LED bulbs. All the bulbs worked fine for a while. Then, one day, I noticed the OFF button was not illuminated. Then a few days later it was working. Then, a few days later it wasn't.

I had to take the dash apart for another project I was doing, so I took the bulbs out of the climate control switches, switched them around and, lo and behold, all of them were working. I put everything back together and everything worked fine for a couple of weeks, then the same thing started happening with the same switch. The bulb would work, then wouldn't, then quit working altogether.

Next time I need to take the dash cover off, I am going to take that bulb out and put some dielectric grease on the contacts of that bulb and see if that does anything.
Dielectric grease doesn't conduct electricity - it insulates against it. It won't help. You have a dying part in that particular LED. I've had this issue with some of my exterior bulbs. None from my interior ones, however, thank goodness. The best remedy is to replace the bulb. If you have to take apart the dash anyways, you might as well.
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Old 08-14-2013, 09:04 AM   #294
jag911
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Re: Interior Switches' LED conversion

Ok after reading the entire 30 or so page thread here... First off thanks to everyone who posted information on this project. As many of you, I started with a cruise light out that the local Honda dealership wanted an ungodly amount to fix (along with the dome map light switch, but that's another thread).

Couple of thoughts and or things I did or learned.

first, on polarity. I took a 9v tested and marked the negative side of all of the led's before i started. then when i took off the dash i removed every switch and the climate control mounts so they could be plugged in and hanging from the dash area while i had power attached and the light switch on. At that point i was able to use a multimeter to test voltage across the pins of the lights and mark the negative side on the switch. Then shut it all down and replace the lights. 100% right the first time (minus climate, more on that in a second), and the effort of removing the switches, light dial, and climate control was a nit compared to taking it all apart over and over again.

next, i ordered from super bright leds. the product is nice but i have to agree, the base is soft so be careful torquing them down.

onto the climate control. the four t3's behind the lcd are a little different than everything else. they are actually a part of a transistor controlled circuit and the feed isn't the same voltage as the stock 12v going to every other bulb location. presumably this is to keep it slightly dimmer than the rest.

I believe i've read in this thread time and time again where people believe their bulbs on the LCD aren't working. They are, they are just VERY dim. This circuit doesn't drive the same power and so the integrated resistor value isn't correct for this application.

Based on the voltage reading i was getting from the sockets i expected i should be able to mount a stock LED into one of the spare t3 bases and wire these four direct. It was beautiful for about 3 seconds. Ok, so maybe not the best idea. The secondary affect this had was to burn out the transistors/circuitry that fed the stock bulb locations (not completely, but now they only received about 1.1v. transistors can be delicate animals).

So onto the "fix" The bulbs to the left and right on the dials are stock 12v sourced. a little care with a file to remove the green coating on the top of the copper traces i exposed + and - and rewired the four LCD bulbs to run off of this power directly. Now that's nice and bright! For anyone who hasn't done this before, be careful. those traces are NOT very thick nor are they "glued' to the circuit board very well. too much pressure of the wrong type and you'll break the trace and have another problem on your hands. so do this at your own risk.

I ended up with all blue except the hazard which i stuck red behind. looks very nice. So again, thanks to everyone for their information sharing here. Think i'm in for around $40 in parts.

I am still a bit surprised that no one has posted their efforts to replace the SMT LED's in the steering wheel, stock HU, and door switches. I'd like to get some feedback on their experience with this before i go at it. I'm not new to soldering and even have a hot air rework station here at my desk for this sort of work. I'll keep watching as time goes by and begin playing. Hopefully someone can provide some feedback. and if not, i'll do my best to add my .02 as i go through it. PLanning on starting with a rear window switch in case things go wrong i'm not terribly affected by it.

thanks again everyone.
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Old 08-14-2013, 11:17 AM   #295
IanRTL
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Re: Interior Switches' LED conversion

I have to commend you for an excellent first post. And welcome to the ROC. The steering wheel and stock HU led's are not impossible to change. If you have good soldering/desoldering skills and can source the tiny SMD's to fit the application, you could do it rather easily. What isn't very easy is taking the steering wheel apart. I was a volunteer firefighter for five years and have seen what accidental airbag deployment can do to someone, so that is one of the only reasons I haven't tried it. As long as you're careful about everything and ensure the truck is fully discharged before disconnecting the airbag, you'd be just fine. The stock HU is quite easy to take apart with a tiny screwdriver kit. Just make sure you have steady hands and some patience. There are A LOT of SMD's in the stock HU. I'd guess about 15-20 or so. If you do this, make sure to take plenty of pictures and write up a how-to on it.
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Old 08-15-2013, 11:19 AM   #296
jag911
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Re: Interior Switches' LED conversion

Thanks Ian!

Well, on my lunch break today I attempted the first window switch replacement and it was a success. Unfortunately the SMD LED's I keep are smaller than the ones used in the truck, so i need to order a roll of them from Mouser. Will probably wait until i get the headunit face off for a more accurate total count.

Drivers side passenger door is where i started.
- roll down window
- remove trim at rear of window (two slide "in" bits at bottom and one clip towards the rear up higher)
- remove cover behind handle (actually didn't do this, apparently my truck doesn't have one anymore... more on that at the end of this post)
- remove two screws behind handle
- pull handle assembly out starting with "front" first
- unhook cable (slide brown part out off ball, pull green holder out of it's keeper)
- remove door grip rubber matt, and one screw behind it.
-starting at top rear of door, slowly pop the plastic keepers in place not bending the door too much (and don't pull it out too much)
-reach behind and disconnect the courtesy lamp and switch harness
-lift the door up and away
-retrive any plastic clips left in door and return them to the door cover

- remove three screws from window switch (top, underneath, front)
- there are four clips holding a square cover over part of the circuit board inside and two clips holding the blue harness clip
-once those are off you can slowly pull out the circuit board by grabbing the harness and pulling straight up. *note* underneath is a very small slider with delicate bits of metal, be careful not to bend/break them
- use a multimeter to test diode mode and find which side of LED is + and - (mine was - towards the 1 and + towards the L of the silkscreen label LED1. It is found just below the big hole in the center of the circuit board)
- use your favorite soldering technique to remove old LED and replace with an appropriate replacement of your color choice. I have a hot air rework station and variable solder gear handy. The hot air usually works pretty well for this stuff but for some reason it was being stubborn so i had to revert to the classic iron.
- dont forget to use flux to clean up the area for a good connection
- ... and then put it back together in reverse order! easy enough.

now not knowing what was behind the door cover (except the courtesy light) i pulled pretty hard on the cover, which in turn "opened" the window switch for me with pieces falling all over the place. So... learn from that one and be easy! I got lucky that i did no permanent damage.

I guess in theory it's repeat from here. I'll put up a couple pix if i can, one of the switch all apart and one of the finished product (hard to see, but ya, it's blue and working!)

Off topic but to explain the earlier statement about bits missing... My truck came from being in an F5 tornado early in it's life, in Greensburg KS. It escaped relatively unharmed... with blown out glass everywhere and some minor body damage. I picked it up in 2007 after a Honda dealership "fixed" it and had a hard time selling it after explaining it went through tornado that wiped out an entire town. Keep in mind it wasn't totaled, that's how little the damage was really. But as I take apart and tweak things in the truck i notice small things that are always a miss. Like today, the cover missing behind the handle or that both plastic covers in the door grip were on the passenger side on top of each other.
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Last edited by jag911; 08-15-2013 at 11:23 AM. Reason: added the bit at the bottom
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Old 08-15-2013, 12:15 PM   #297
jag911
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Re: Interior Switches' LED conversion

Adding a couple pix of the dangling switches and LCD to go with the earlier post
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Old 08-15-2013, 12:34 PM   #298
rollinhonda
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Re: Interior Switches' LED conversion

Quote:
Originally Posted by jag911 View Post

first, on polarity. I took a 9v tested and marked the negative side of all of the led's before i started. then when i took off the dash i removed every switch and the climate control mounts so they could be plugged in and hanging from the dash area while i had power attached and the light switch on. At that point i was able to use a multimeter to test voltage across the pins of the lights and mark the negative side on the switch. Then shut it all down and replace the lights. 100% right the first time (minus climate, more on that in a second), and the effort of removing the switches, light dial, and climate control was a nit compared to taking it all apart over and over again.
I had the same concerns as you about getting it right the first time. I checked and market each replacement LED first as you did. The added benefit of making sure the new ones all work was worth a little effort.

Then, after removing the dash, laid it out on a table, and as I removed the old bulbs, I noted how they went in and checked them for polarity and their relative position, so I could correctly install the replacements.

I give you credit for your added efforts in getting the Climate display to work. I look forward to reading your further adventures in this area!
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Old 08-15-2013, 12:50 PM   #299
jag911
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Re: Interior Switches' LED conversion

Thx Rollin... I need to tweak the climate control a bit, but haven't gotten to a point where i want to tear out the dash again. Will do that when i get back to the radio LED's. It's quite beautiful and great during the day or twilight when there is light outside but is just a bit bright for nighttime for my taste. Next time i get in there i'm going to toss a resister inline and see if i can dumb it down a bit.

While on the topic. There are three full size (5mm) LED's that handle the status buttons for defrost and what not (orange and green i think.) They are not full round like a regular LED but oval or squarish. I have some oval 5mm led's that didn't fit the light tunnel or i could have made them blue too. I was thinking though of milling down some stock round ones until they fit and changing these out too. Probably Purple just for the heck of it... Anyone try this and if so have any feedback?

I think there is another side effect but i can't remember stock functionality (strange when i've driven this truck daily for 6 years now, putting about 65k of my own miles, that i can't remember something like that!). Seems to me that the stock LED's that light the LCD were on when the truck's lights were not on, similar to the radio. This is likely another reason for the extra circuitry for these four special bulbs. With my "fix" (aka hack) it only comes on with the lights in the truck. good or bad, your choice. I can read the LCD during the day so it doesn't bother me.

Back on topic, i just ordered a couple model blue SMD LED's from mouser (50 each, hopefully that'll cover the need). They are a little larger than what i have on hand, and should match the existing a little better (roughly 3mmx1.6mm). So i'll probably update next when those arrive in a week or so.

Last edited by jag911; 08-15-2013 at 01:13 PM. Reason: Adding question about status LED's
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Old 08-15-2013, 01:12 PM   #300
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Re: Interior Switches' LED conversion

Excellent point on 'night lighting' (when the headlights are on). That functionality might be easily overlooked if taking a global "pull this one out put this one in" approach.
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