Traction control etc. light change??? - Mustang Evolution

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Old 03-18-2014, 10:04 PM   #1
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Traction control etc. light change???

I have a 2004 gt and I'm wanting to change the traction control,rear defrost, and fog light button bulbs just wondering what part number I would need. And also wondering if I can change the light on the a/c heater control switch without soldering I haven't even took it out yet.
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Old 03-19-2014, 12:32 PM   #2
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I have a 2004 gt and I'm wanting to change the traction control,rear defrost, and fog light button bulbs just wondering what part number I would need. And also wondering if I can change the light on the a/c heater control switch without soldering I haven't even took it out yet.
The LEDs in the t/c, defrost and fog lamp buttons are not "plug-n-play" devices, but rather plain ol' radial lead LEDs as found in most electronic device--with a "gotcha".

Here is the t/c switch:



At the top is the t/c indicator LED, at the bottom the switch illumination device. As you can see they are mounted into split post terminals much as in telco distribution blocks and RJ-xx connectors. No big deal yet, however here is the gotcha.

The LEDs have itty-bitty little internal current limiting resistors so that they can be directly powered by 12V. They are not widely available except through electronics parts houses (maybe the LED automotive people have them now-IDK)--here is one source however all they offer is red, amber and green...
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New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
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Old 03-19-2014, 04:25 PM   #3
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yeah never understood why every one uses that orange amber type color.. so ugly... why not blue or green or white or ....
even my keyboard im typing on uses the orange to signify CAPS ARE ON...
a bmw I used to have the whole dash was that orange amber color... wish it was easy to change.
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Old 03-19-2014, 05:15 PM   #4
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They use colors that won't blind you or distract you from driving mostly. In my opinion.
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Old 03-19-2014, 05:22 PM   #5
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yeah never understood why every one uses that orange amber type color.. so ugly... why not blue or green or white or ....
even my keyboard im typing on uses the orange to signify CAPS ARE ON...
a bmw I used to have the whole dash was that orange amber color... wish it was easy to change.
It's called "ergonomics", a design field that deals in part with making human/machine interfaces easier and less stressful to use. In this case the issue is that the human eye is most sensitive to green/yellow/amber light:



So by making nighttime instrument lighting green/yellow/amber the pupils in our eyes do not have to open as much (can remain more closed) to see the instrument display. This in turn reduces "flash blindness" caused by oncoming traffic and in fact allows we poor humans to better adjust from reading the instruments to seeing the pathway lit up by our own headlights.

This is opposite to why red light is used in situation and control rooms (submarines in particular) in nighttime combat. If you examine the graph you'll see that our eyes are least sensitive at the red end of the spectrum. Therefore using red light in the control room causes the human's pupils to open as wide as possible, so that when they then look out onto the dimly lit battlefield through a binocular or periscope their eyes are already as wide open as they can be, allowing immediate best possible viewing without waiting for their eyes to "adjust".

Blue or red would be the worst possible colours for automotive gauge/instrument panel illumination. The fashionable white displays are also less than optimal...
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SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
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Old 03-19-2014, 05:43 PM   #6
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Didn't some pontiacs use red? My wife's car has red its a Pontiac sunfire
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Old 03-19-2014, 05:50 PM   #7
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Didn't some pontiacs use red? My wife's car has red its a Pontiac sunfire
Yes, they did--one of the stupidest things GM ever did. No small distinction given GM's proclivity for stupid automotive designs...
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SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
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Old 03-19-2014, 05:52 PM   #8
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Old 03-19-2014, 06:07 PM   #9
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^That changes what?
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SOLD! - 2003 GT, UPR X, FRPP 24lb/h, Magnaflow, PP 70mm TB & plenum, Delta Force tuned,
Steeda UDPs, Ralco flywheel, RAM HDX clutch, 3.73s, 262 rwHP/305 lb-ft.

New ride (7/1/2013) 1998 Mercedes SL500-5.0L 32V VVT 326/347 HP/tq
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Old 03-19-2014, 10:19 PM   #10
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You guys think I could take a bulb out and get them at radioshack?
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Old 03-19-2014, 10:22 PM   #11
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And would I need the 3 or 5mm? I'm guessing 3 but I just want to be on the safe side
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Old 03-19-2014, 10:34 PM   #12
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I drive a 2000 and everything is green and red except for those small indications such as defrost, fog light switch and small things so why they had to make those amber is just bad taste
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