ES300: Replacing Cluster Backlighting Bulbs

Lexucan · 03-26-07, 01:47 AM

Removing the cluster ('92-'96) ES300:

IMPORTANT TIP: If the ignition key is turned while the cluster is disconnected from the dash, the airbag light inside the cluster will come on and stay on once the cluster is reconnected. So as a precaution, I recommend you disconnect your negative battery terminal before starting the project, just to play it safe. EXCEPTION: those who still have the factory radio installed and don't know their radio's 3-digit security code. Disconnecting the battery will lock up the radio until the security code is entered.

1) First, adjust your steering wheel to its lowest position.
2) You need to then pop open the two plastic tabs at the top of the cluster that hide two Phillips screws. The tabs are hinged at the back so use a small knife or flat head screwdriver to pry them open at the front edge so you can get to the screws behind them. Be careful not to scratch the plastic on your bezel.
3) Once the screws are removed you should be able to slide the cluster bezel (which frames your cluster and contains your display brightness control and Tripmeter/Odo and Reset buttons) forward so that you can disconnect the two small wiring harnesses behind it. The bezel has two large clips that keep it in place but when you pull the bezel forward they should let go. Each harness connector has a locking tab so you will have to depress the tab while grasping and gently wiggling the connector to free it. Don't pull on the wires themselves!
4) Once the two harnesses have been disconnected and the bezel has been set aside, you will need to remove the four screws which mount the cluster to the dash. There is a black Phillips head screw going through each of the cluster's four mounting holes - top left, top right, bottom left, bottom right.
5) Then you can pull the cluster forward and disconnect the three color-coded wiring harnesses at the back (see photo below). They also have locking tabs. **Again, do not pull on the wires themselves.**

Disassembling the cluster to get to the backlighting sockets

IMPORTANT TIP: The front face of the instrument cluster is made of fairly soft smoked clear plastic and can be easily scratched. When working with the cluster, lay it on a soft towel to protect the face from damage.

A) Remove white plastic protective shroud from back of cluster

There are seven (7) Phillips head screws to remove.

B) Disconnect top circuit board

1) There are sixteen (16) Phillips head screws to remove.

IMPORTANT TIP: When re-assembling the cluster once the backlighting bulbs are replaced, be sure that all 16 screws are snug again, but don't overtighten them. Leaving any of these screws loose when re-assembling the cluster could result in one or more of your gauges not functioning.

2) There are also three (3) ribbon cables to disconnect. The ribbon cables can easily be disconnected by pulling up on the black plastic locking rings that surround the connectors and then sliding the ribbon cables out of the connectors.

3) Once the screws are out and the ribbon cables are disconnected, lift the circuit board straight up to free the speedometer and tachometer contact pins that stick up through four holes on the top circuit board from underneath and are clamped by friction clips. The pins will just slide free of the friction clips when you gently pull up on the board.

C) Fold top circuit board out of the way to expose backlighting sockets underneath

There is no need to fully disconnect the top circuit board from the cluster. The harness on the left side with the black, red, and white wires can remain connected (see photo below).

D) Backlighting sockets are exposed

The eight green backlighting sockets pull out by turning them to unlock them.

E) Replace the burnt out incandescent backlighting bulbs with new bulbs or LEDs

The old incandescent bulbs should come out of the sockets easily. Just wiggle and gently pull on them with your fingers until they come loose. Replace with new bulbs or LEDs (noting the correct polarity if you use LEDs). See photo below for proper positive and negative (+/-) polarity orientation. If you use incandescent bulbs, proper polarity is not important.

IMPORTANT TIP: It is wise to replace ALL EIGHT of the backlighting bulbs at once, even if only a few of them were burnt out. You probably don't want to have to go through this process again in a few months to replace another burnt out bulb.

Tools Needed:
Small Flat head screwdriver or pocket knife
Medium Phillips head screwdriver

Replacement Incandescent Bulbs:
14V wedge-base - Lexus Part No.: 83119-24570
or
Toyota Part No.: 90069-98004
Source:
#74 Miniature Indicator Lamp - 14 Volt - T1-3/4 Sub Mini Wedge Base - EIKO #74
Manufacturer: EIKO International
Manufacturer's Part Number: 74
14V .1A/T1-3/4 Sub Mini Wedge Base
14 Volts
Filament: C-2F
1,000 Life Hours
T-1 3/4 Bulb
Sub-Miniature Wedge (W2.1x4.9d)
Length: .80 in.
Sold by Full Case Only (10)
$5.31 per box.

(Bulb source info contributed by CL member: Esource ...thank you!)

LED Sources:
Dialight.com (P/N: 5861A06103F)
JKL Components Corp. (P/N: LE-0504-01W) PDF Data Sheet
Superbrightleds.com (P/N: 74-W)
e-bay.com (try entering 286 LED (or) 74 LED into the e-bay search box)
**I'm told a very popular e-bay seller of these LEDs is warden_jp2002**

Photo example of a flat-topped 5mm wedge-base LED:

Flat-topped LEDs emit light from the sides as well as the top.

IMPORTANT TIP: The use of rounded or domed LEDs is not recommended for the cluster backlighting. They emit light primarily from the top and can cause severe "spotting" (uneven light distribution) in the instrument cluster display. Flat-topped LEDs emit light from both the sides and the top. This helps to reduce the "spotting" effect.

Rounded or domed LED (not recommended) :

Link to needle fix DIY write-up:
If your factory illuminated gauge needles are flickering or totally burnt out (common to the 2nd generation ES300) HERE is my detailed DIY write-up for fixing them - A perfect time to do it while your cluster is out of the car! Get your <RED TIPPED NEEDLES while they're HOT!

Comparison Photos:

The "old look" with burnt out incandescent backlighting bulbs and dead needles!

The "new look" with white/blue LED backlighting and new <RED TIPPED NEEDLES!

tuan92129 · 03-26-07, 02:48 AM

Quote:

Replacement Bulbs:
12V 5mm Wedge base #74 (Lexus P/N: 83119-24570)
(or) LED equivalent

I want to replace the 8 bulbs with leds from superbright leds
I've read on lextech.org that they use number 24 bulbs? Also, is there a clear plastic light diffuser that spreads the light onto the numbers? I've had trouble in a friend's honda with spotting and the led not fitting the diffuser b/c of the plastic.

Lexucan · 03-26-07, 03:12 AM

Quote:

Originally Posted by tuan92129

I want to replace the 8 bulbs with leds from superbright leds
I've read on lextech.org that they use number 24 bulbs? Also, is there a clear plastic light diffuser that spreads the light onto the numbers? I've had trouble in a friend's honda with spotting and the led not fitting the diffuser b/c of the plastic.

The #286, #24, or #74 bulbs should fit.
Diffuser - In my '93 ES300 the original filament bulbs had blue rubber boots over the bulbs, which I suppose would act like a light diffuser of sorts. When I replaced the bulbs with LEDs (which are a different shape to the bulbs) I removed the boots from the old bulbs and put them on the LEDs but because of the different shape they were not a good fit. I tried glueing them in place with Krazy Glue but that did not work well. So, I ended up not using the boots at all. There may be a very slight amount of "spotting" with the LEDs but nothing very noticeable, IMO.

This is the shape of the LEDs I used:

They have a flat top and are designed to spread the beam of light over a wider angle than the normal domed top version.

yr0169tw · 10-30-07, 07:18 AM

Quote:

Originally Posted by Lexucan

The #286, #24, or #74 bulbs should fit.
Diffuser - In my '93 ES300 the original filament bulbs had blue rubber boots over the bulbs, which I suppose would act like a light diffuser of sorts. When I replaced the bulbs with LEDs (which are a different shape to the bulbs) I removed the boots from the old bulbs and put them on the LEDs but because of the different shape they were not a good fit. I tried glueing them in place with Krazy Glue but that did not work well. So, I ended up not using the boots at all. There may be a very slight amount of "spotting" with the LEDs but nothing very noticeable, IMO.

This is the shape of the LEDs I used:

They have a flat top and are designed to spread the beam of light over a wider angle than the normal domed top version.

The leds you should use call t6.5 wedge base, not T5(the one you uses) because it is too small and not bright enough.
I find T6.5 led on Yahoo auction Taiwan, it is us$4.5 per piece.

lexusk8 · 03-26-07, 09:39 AM

Great DIY write-up Lexucan. I will add this to the master DIY thread stickied at the top

tuan92129 · 03-26-07, 11:54 AM

And the 8 bulbs are for the actual backlighting of the rpm/mph guages? In my car, the guages are yellowish/incandescent color and then don't have a boot. I'm assuming the boot is used only to change the bulb's color.

Lexucan · 03-26-07, 02:23 PM

Quote:

Originally Posted by tuan92129

And the 8 bulbs are for the actual backlighting of the rpm/mph guages?

Correct. The two outermost bulbs also illuminate the markings for the temperature and fuel gauges.

Quote:

Originally Posted by tuan92129

In my car, the guages are yellowish/incandescent color and then don't have a boot. I'm assuming the boot is used only to change the bulb's color.

Yes, before I replaced my bulbs with LEDs the gauges had a slight yellowish look to them as well. Now they are white/blue in appearance....much more modern and attractive looking, IMO.
My 8 original incandescent bulbs had little blue boots on them. They didn't seem to affect the colour of the gauges though - still yellowish - so I assumed they must be to help diffuse the light.....but maybe not.

tuan92129 · 03-26-07, 03:15 PM

Hey Lexucan, thnks for taking the time to answer all my noob questions

Just ordered leds from ebay @ 1.50/2 leds...so cheap

vstolyarov · 03-29-07, 10:07 PM

I want replace es300 95 backlights with white or blue leds.
how do you search for equivalent led replacement?

Parker Gen · 04-09-07, 10:54 PM

What site did you use to order the LED's from China?

Oh, ok Ebay... No probs.

Lexucan · 04-10-07, 08:05 AM

Looking good tuan92129

Thanks for adding to the DIY write-up to help keep ppl from getting confused.
Supposedly a picture is worth a thousand words, but....not always.

Too bad your LEDs aren't all the same color. I ordered two from ebay for my licence plate lights. They BETTER be the same color or "something" is going to fly!
You are lucky to still have 4 working needles! Good idea to keep the brightness down to try to preserve them as long as possible. Unfortunately, two of mine were already completely dead when I bought my car

92ES5sp · 04-10-07, 11:36 AM

Quote:

Originally Posted by Lexucan

Looking good tuan92129

Thanks for adding to the DIY write-up to help keep ppl from getting confused.
Supposedly a picture is worth a thousand words, but....not always.

Too bad your LEDs aren't all the same color. I ordered two from ebay for my licence plate lights. They BETTER be the same color or "something" is going to fly!
You are lucky to still have 4 working needles! Good idea to keep the brightness down to try to preserve them as long as possible. Unfortunately, two of mine were already completely dead when I bought my car

Hey when they burn out, what goes first, the needles or the backlights? I guess its amazing mine still work but they probably wont last forever

Do they just one day burn out or gradually or what? I actually didnt know they did burn out until seeing pics on CL.

Lexucan · 04-10-07, 11:59 AM

Quote:

Originally Posted by 92ES5sp

Hey when they burn out, what goes first, the needles or the backlights? I guess its amazing mine still work but they probably wont last forever

Do they just one day burn out or gradually or what? I actually didnt know they did burn out until seeing pics on CL.

Theoretically, the LEDs inside the needles should not burn out since normally LEDs last a loooooong loooooong time and MUCH longer than any incandescent bulb (like those for the backlighting) but because of the fact that they often receive too much voltage in the ES300 cluster (depending on factors like how much the car is driven with the lights on, how the brightness of the cluster is set etc.) the needles can burn out prematurely - often before the backlighting bulbs die.
When the needles are dying, I think they usually start to "flicker" and often a section of a needle will burn out before the whole needle dies completely. You can see this in the "before" pic I posted above of my cluster. The speedo and fuel gauge needles are still partially lit but are obviously on their way out.
If I were you, I'd do as tuan92129 does and ALWAYS drive with the parking lights on (even during the daytime) and ALWAYS reduce the brightness of the cluster display. This will help to keep your needles from burning out. Having four fully illuminated needles in a '92 ES is a pretty rare thing, IMO !!!

92ES5sp · 04-10-07, 04:07 PM

Thanx Lexucan! Um....here is my 100K photo which youve seen. So the backlights are incandescent bulbs and not LEDs right? Ill dim the brightness of my cluster to keep em going.

Ill be referring to your DIY when the time comes, the red tips look badass!!

One day about a year ago or so my temp needle had a slow flicker to it, then it had a dead spot so I whacked it and theyve been fine!

Parker Gen · 04-10-07, 05:06 PM

I'm soo confused... I've gone to all the motor acessories shops round here, and none of them have the 5mm 3W bulb for the backlghts. And none have LED's that can match the size of the original bulb. Do any of you have a link where you bought the LED's from so I can buy some?? My problem is shipping to Australia.
And another question. Did these LED's that you guys bought fit straight into the housing for the original bulb? No soldering needed?
Thanks.

P.S. I got chrome needles in my cluster :thumbs:
Pictures when I put it back into my car with new Backlights (That's all I'm waiting for now!!)