DIY LED gauge conversion for less than $20! Part 1
#1
DIY LED gauge conversion for less than $20! Part 1
I know this subject has be covered a few times but I do not believe it has been covered
this way. I decided the other day to go ahead and do a conversion on my truck. So I
started by ordering some UV LEDs I purchased 100 of them on ebay for $8.80 shipped to
my front door (If you want the sellers name I am happy to give it to you). These are
really bright true ultra violet (They act just like a black light does) LED's. The LEDs
obviously are not 12 volt so that had to be addressed, you can use ohms law to figure
this out really easily I was feeling lazy so I just went here
http://led.linear1.org/1led.wiz plugged in my numbers (12 volt source, my LEDs were 3.2
volts and 30ma) based on that I needed a 330 ohm 1/2 watt resistor. Off to radio shack
and 3 bucks later I had 15 of the correct resistors. Now that I have all my supplies
lets get to tearing stuff apart. The first thing your going to need to do is pull the
gauges out (I suggest you do this one at a time) remove the plastic cover over the
gauges my removing the 4 screws (I am going to assume your gauge cluster at this point
is already out)
[IMG]http://img404.imagesha
ck.us/img404/3389/dsc01178q.th.jpg[/IMG]
There are 4 tabs 2 on the top and two on the bottom this is where you will find the 4
torx screws that need to be removed. Once those are out you must remove your trip meter
reset **** simply twist it counter clockwise and it will come back off. Now remove the
clear plastic cover. Once you remove the clear cover you will be able to remove the
black gauge cover as well.
[IMG]http://img406.imagesha
ck.us/img406/3149/dsc01179k.th.jpg[/IMG]
I got a little ahead of myself at this point and forgot to take pictures. Your gauges
have a blue light diffuser in them, now in my case a blue filter is bad, why you ask?
Because I am shinning purple light through a blue filter, purple is pretty darn close
to blue so a large portion of the light coming from my LED is getting filtered through
the blue diffuser which means my gauge will not gauges will not light up very bright.
The first gauge I tackled was the tach and I am sorry I did not get pictures of the
removing of the light diffuser process. So we are going to start with the speedometer
(Not the removal process for both of them is the same more or less the only major
difference is how the light diffuser is removed I will cover that later). Now using the
same torx you used to remove the clear plastic lense remove the 3 screws holding the
speedometer in place. Once the screws are out the gauge should pop right out.
[IMG]http://img91.imageshack
.us/img91/3693/dsc01181z.th.jpg[/IMG]
Now break into your girlfriend/wife's bathroom and steal one of her hair things (check
out the picture I have no idea what this is but it works really well) slide the hair
thingy under the needle and start pulling straight up the little black cap on the
needle is going to pop off first I found doing this in a plastic bag makes it a lot
easier to keep track of that black cap. It takes a considerable amount of force to get
that needle to pop up but it will come off.
[IMG]http://img198.imagesha
ck.us/img198/3345/dsc01186o.th.jpg[/IMG]
Now it's time to remove the gauge face from it's backing, start at the top corner and
gently peel the gauge away it might not want to go at first but just keep putting
pressure on it once it starts letting go it goes quick. Don't forget you have the trip
meter post still sticking through the gauge face. When you get the face off turn it
over look at the back, see how the numbers are all blue? This is bad! Also see that
little black ring where the trip meter passes through? Don't loose that I removed mine
and slid it back over the trip meter post. The next thing to do is to remove the double
sided tape I found the best way to do this is roll it under your thumb. Start at once
side and just roll this stuff like a giant booger across the back of the gauge face it
takes about 5 minutes to do the whole gauge.
Removing double sided tape...
[IMG]http://img217.imagesha
ck.us/img217/232/dsc01189s.th.jpg[/IMG]
Tape removed...
[IMG]http://img217.imagesha
ck.us/img217/2571/dsc01191w.th.jpg[/IMG]
Alright now we are going to discuss how to deal with the tach. All the procedures are
the same up to this point except you do not need to remove the double sided tape on the
gauge face. For some reason the tach is the only gauge built different in the whole
cluster and actually is the easiest gauge to deal with. Once you have removed the face
turn it over you will see a small magnet likely attached to the back of the gauge face,
Remove the magnet and place it in the correct hole in the clear plastic you just
removed the gauge face from (The hole is right next to where the needle goes, it's
obvious where it goes). The next step is to remove the blue diffuser look at the gauge
face you will see a blue piece of plastic and the gauge face stuck together. Simply
peel them apart. Once you have the blue diffuser peeled off the gauge face put the
gauge face back on by first setting the face over the two nipples sticking out of the
top of the gauge plate then lay it down top top bottom. The tach is now done. (sorry
again no pictures of this process)
I don't have the pictures of the speedometer edited yet, I will have the rest of the
procedure for the speedometer up later this afternoon. Lets talk about how to build the
lights. First off remove the light base from your gauge by twist it counter clockwise.
You might need pliers to get it to turn. Once out remove the light bulb and look inside
the base. There are two brass contacts in there.
[IMG]http://img41.imageshack
.us/img41/5153/dsc01194p.th.jpg[/IMG]
We are going to remove them one at a time and do some soldering. Start by sliding a
small screw driver down the side of one of the contacts. Slowly rotate the screw driver
until you feel it pop.
[IMG]http://img10.imagesha
ck.us/img10/6697/dsc01195fhg.th.jpg[/IMG]
Do the same for the other side of the contact, now it should come right out you might
have ti wiggle it a little bit but it will come out. This is about how the contact
should look when it's ready to come out
[IMG]http://img41.imagesha
ck.us/img41/5692/dsc01196hqo.th.jpg[/IMG]
Here we have the contact out, once you get the contact out set the base aside.
[IMG]http://img37.imageshack
.us/img37/3046/dsc01197g.th.jpg[/IMG]
We are now going to solder the contact and to get it ready for our resistor. I was
doing this inside so I have to protect my table with a leather glove apply a small
amount of solder to the bottom of the contact.
[IMG]http://img39.imageshack
.us/img39/1262/dsc01198a.th.jpg[/IMG]
Now clip one wire of your resister so it's about 1/8" long and bend it over,
[IMG]http://img10.imageshack
.us/img10/7033/dsc01200i.th.jpg[/IMG]
it just so happens the resistor fits perfectly in the contact, so pop the resistor in
heat up the bottom with your soldering iron add just a little solder if you need and
your resistor will be all set.
[IMG]http://img10.imageshack
.us/img10/2759/dsc01202p.th.jpg[/IMG]
Reinstall the contact into the base, use the small screwdriver to shove it back in this
can be a bit of a pain so take your time!
Now repeat the above process to remove the other contact and add solder. This time we
are going to work on the LED (sorry I don't have any pictures of the LED part but it is
the same process more or less.) determine which leg of your LED is the positive lead
(the longer of the two is positive) trim the negative lead so that the LED is slightly
higher than flush with the top of the light bulb base. Now bend the positive lead
straight up solder the negative lead into the contact and reinstall the contact into
the base with the LED. Bend the positive lead over the the resistor clip the resistor
lead and LED lead so they are both short and solder them together. Your LED bulb is now
complete. It should look like this;
[IMG]http://img140.imagesha
ck.us/img140/4941/dsc01208x.th.jpg[/IMG]
[IMG]http://img91.imageshack
.us/img91/6734/dsc01207z.th.jpg[/IMG]
install the light into your gauge, if the LED does not light up simple pull it out,
rotate it 180 degrees and it will light up.
I will be covering how to remove the blue light defuser from the rest of the gauge face
in the next part of this how to. If you have any questions please feel free to ask.
this way. I decided the other day to go ahead and do a conversion on my truck. So I
started by ordering some UV LEDs I purchased 100 of them on ebay for $8.80 shipped to
my front door (If you want the sellers name I am happy to give it to you). These are
really bright true ultra violet (They act just like a black light does) LED's. The LEDs
obviously are not 12 volt so that had to be addressed, you can use ohms law to figure
this out really easily I was feeling lazy so I just went here
http://led.linear1.org/1led.wiz plugged in my numbers (12 volt source, my LEDs were 3.2
volts and 30ma) based on that I needed a 330 ohm 1/2 watt resistor. Off to radio shack
and 3 bucks later I had 15 of the correct resistors. Now that I have all my supplies
lets get to tearing stuff apart. The first thing your going to need to do is pull the
gauges out (I suggest you do this one at a time) remove the plastic cover over the
gauges my removing the 4 screws (I am going to assume your gauge cluster at this point
is already out)
[IMG]http://img404.imagesha
ck.us/img404/3389/dsc01178q.th.jpg[/IMG]
There are 4 tabs 2 on the top and two on the bottom this is where you will find the 4
torx screws that need to be removed. Once those are out you must remove your trip meter
reset **** simply twist it counter clockwise and it will come back off. Now remove the
clear plastic cover. Once you remove the clear cover you will be able to remove the
black gauge cover as well.
[IMG]http://img406.imagesha
ck.us/img406/3149/dsc01179k.th.jpg[/IMG]
I got a little ahead of myself at this point and forgot to take pictures. Your gauges
have a blue light diffuser in them, now in my case a blue filter is bad, why you ask?
Because I am shinning purple light through a blue filter, purple is pretty darn close
to blue so a large portion of the light coming from my LED is getting filtered through
the blue diffuser which means my gauge will not gauges will not light up very bright.
The first gauge I tackled was the tach and I am sorry I did not get pictures of the
removing of the light diffuser process. So we are going to start with the speedometer
(Not the removal process for both of them is the same more or less the only major
difference is how the light diffuser is removed I will cover that later). Now using the
same torx you used to remove the clear plastic lense remove the 3 screws holding the
speedometer in place. Once the screws are out the gauge should pop right out.
[IMG]http://img91.imageshack
.us/img91/3693/dsc01181z.th.jpg[/IMG]
Now break into your girlfriend/wife's bathroom and steal one of her hair things (check
out the picture I have no idea what this is but it works really well) slide the hair
thingy under the needle and start pulling straight up the little black cap on the
needle is going to pop off first I found doing this in a plastic bag makes it a lot
easier to keep track of that black cap. It takes a considerable amount of force to get
that needle to pop up but it will come off.
[IMG]http://img198.imagesha
ck.us/img198/3345/dsc01186o.th.jpg[/IMG]
Now it's time to remove the gauge face from it's backing, start at the top corner and
gently peel the gauge away it might not want to go at first but just keep putting
pressure on it once it starts letting go it goes quick. Don't forget you have the trip
meter post still sticking through the gauge face. When you get the face off turn it
over look at the back, see how the numbers are all blue? This is bad! Also see that
little black ring where the trip meter passes through? Don't loose that I removed mine
and slid it back over the trip meter post. The next thing to do is to remove the double
sided tape I found the best way to do this is roll it under your thumb. Start at once
side and just roll this stuff like a giant booger across the back of the gauge face it
takes about 5 minutes to do the whole gauge.
Removing double sided tape...
[IMG]http://img217.imagesha
ck.us/img217/232/dsc01189s.th.jpg[/IMG]
Tape removed...
[IMG]http://img217.imagesha
ck.us/img217/2571/dsc01191w.th.jpg[/IMG]
Alright now we are going to discuss how to deal with the tach. All the procedures are
the same up to this point except you do not need to remove the double sided tape on the
gauge face. For some reason the tach is the only gauge built different in the whole
cluster and actually is the easiest gauge to deal with. Once you have removed the face
turn it over you will see a small magnet likely attached to the back of the gauge face,
Remove the magnet and place it in the correct hole in the clear plastic you just
removed the gauge face from (The hole is right next to where the needle goes, it's
obvious where it goes). The next step is to remove the blue diffuser look at the gauge
face you will see a blue piece of plastic and the gauge face stuck together. Simply
peel them apart. Once you have the blue diffuser peeled off the gauge face put the
gauge face back on by first setting the face over the two nipples sticking out of the
top of the gauge plate then lay it down top top bottom. The tach is now done. (sorry
again no pictures of this process)
I don't have the pictures of the speedometer edited yet, I will have the rest of the
procedure for the speedometer up later this afternoon. Lets talk about how to build the
lights. First off remove the light base from your gauge by twist it counter clockwise.
You might need pliers to get it to turn. Once out remove the light bulb and look inside
the base. There are two brass contacts in there.
[IMG]http://img41.imageshack
.us/img41/5153/dsc01194p.th.jpg[/IMG]
We are going to remove them one at a time and do some soldering. Start by sliding a
small screw driver down the side of one of the contacts. Slowly rotate the screw driver
until you feel it pop.
[IMG]http://img10.imagesha
ck.us/img10/6697/dsc01195fhg.th.jpg[/IMG]
Do the same for the other side of the contact, now it should come right out you might
have ti wiggle it a little bit but it will come out. This is about how the contact
should look when it's ready to come out
[IMG]http://img41.imagesha
ck.us/img41/5692/dsc01196hqo.th.jpg[/IMG]
Here we have the contact out, once you get the contact out set the base aside.
[IMG]http://img37.imageshack
.us/img37/3046/dsc01197g.th.jpg[/IMG]
We are now going to solder the contact and to get it ready for our resistor. I was
doing this inside so I have to protect my table with a leather glove apply a small
amount of solder to the bottom of the contact.
[IMG]http://img39.imageshack
.us/img39/1262/dsc01198a.th.jpg[/IMG]
Now clip one wire of your resister so it's about 1/8" long and bend it over,
[IMG]http://img10.imageshack
.us/img10/7033/dsc01200i.th.jpg[/IMG]
it just so happens the resistor fits perfectly in the contact, so pop the resistor in
heat up the bottom with your soldering iron add just a little solder if you need and
your resistor will be all set.
[IMG]http://img10.imageshack
.us/img10/2759/dsc01202p.th.jpg[/IMG]
Reinstall the contact into the base, use the small screwdriver to shove it back in this
can be a bit of a pain so take your time!
Now repeat the above process to remove the other contact and add solder. This time we
are going to work on the LED (sorry I don't have any pictures of the LED part but it is
the same process more or less.) determine which leg of your LED is the positive lead
(the longer of the two is positive) trim the negative lead so that the LED is slightly
higher than flush with the top of the light bulb base. Now bend the positive lead
straight up solder the negative lead into the contact and reinstall the contact into
the base with the LED. Bend the positive lead over the the resistor clip the resistor
lead and LED lead so they are both short and solder them together. Your LED bulb is now
complete. It should look like this;
[IMG]http://img140.imagesha
ck.us/img140/4941/dsc01208x.th.jpg[/IMG]
[IMG]http://img91.imageshack
.us/img91/6734/dsc01207z.th.jpg[/IMG]
install the light into your gauge, if the LED does not light up simple pull it out,
rotate it 180 degrees and it will light up.
I will be covering how to remove the blue light defuser from the rest of the gauge face
in the next part of this how to. If you have any questions please feel free to ask.
#7
Hey guys there's a website that sells the LED bulbs. It's www.superbrightleds.com my husband redid his MR2 dash with LEDs. He wants to redo my backlighting with bulbs from there. Just thought I would help out a little. Also how do you get rid of the green tint from behind the gauges to get rid of the green look?
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#8
Join Date: Dec 2003
Location: Sycamore, Illinois (displaced to Arkansas)
Posts: 4,119
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Hey guys there's a website that sells the LED bulbs. It's www.superbrightleds.com my husband redid his MR2 dash with LEDs. He wants to redo my backlighting with bulbs from there. Just thought I would help out a little. Also how do you get rid of the green tint from behind the gauges to get rid of the green look?
(http://cgi.ebay.com/ebaymotors/1994-...ht_1858wt_1163)
If you notice the "after" picture, it still looks green.
#9
#10