The heat sink is for the resistor. I do model railroading (when time and money permit), and there is a "yellowglo" LED that looks like the old incadesent locomotive lights. I have switched out 90% of my locomotive incadesent lights already. You must use a resistor, as 12 volts will blow the LED. LED's operate at 2-5 volts.

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RRGrassi


70's Southern Pacific #5608 Fairmont A-4 MOW car

13 VW JSW 2.0 TDI 193K, Tuned with DPF and EGR Delete.

99 W210 E300 Turbo Diesel, chipped, DPF/Converter Delete. Still needs EGR Delete, 232K

90 Dodge D250 5.9 Cummins/5 speed. 400K

Gone and still missed...1982 w123 300D, 1991 w124 300D

I just put in a set of these and am very happy with them at $12.95 the pair w/ no shipping fees.
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=140312716213

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!

you must have done something wrong like installed it with a short somehow.
DO NOT PUT IN HIGHER AMPERAGE FUSES THAT IS ASKING FOR A DISASTER!

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'95 E320 Wagon my favorite road car. '99 E300D wolf in sheeps body, '87 300D Sportline suspension, '79 300TD w/ 617.952 engine at 367,750 and counting!

I beat you I've had LED license plate lights for a couple months, and they look amazing!

I had LED license plate lights for about a year, but they conked out in 2007. I'm back with incandescents for now.

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

I have LED City lights, glovebox, front dome light, rear dome light, license plate lights, and trunk light.

Here we go no flash 11:00pm.

Attached Thumbnails

     

Those city lamps look 'crisp' with that white light. Can you still see the bright white light when the incandescent headlamps are turned on?

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'81 MB 300SD, '82 MB 300D Turbo (sold/RIP), '04 Lincoln Town Car Ultimate

Sooner or later every car falls apart, ours does it later!
-German Narrator in a MB Promotion Film about the then brand new W123.

Yes you can see them with the lights turned on, but only if you looking at the bottom half of the headlights.

WARNING WARNING!!!!!!!
I bought the same leds and the short that some people have is the fact that the wires on the bottom of the leds goes from one side to the other instead of loopong on the side that if comes out of the socket!!!!!
This could burn your dimmer as it did on mine

Update on mine: My Left side socket keeps burning the LEDs out...Right side is fine, but left went through 2 sets. I'm puzzled....redid the solder joints and everything. I guess next step is to break out the multimeter and start tracking with the cluster hanging off.

Btw to the post above me....you might want to reword/rewrite that...I am struggling to follow.

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TC
Current stable:
- 2004 Mazda RALLYWANKEL
- 2007 Saturn sky redline
- 2004 Explorer...under surgery.

Past: 135i, GTI, 300E, 300SD, 300SD, Stealth

If you look at the base of a 194 bulb the wires coming out of the bulb stay on the side that they come out, on the led base on the ones i got the wire went from one side of the base to the other causing a short. I had to bend the leads so the stay on the side of the base that they come out of the plastic so you have no short.

use this link http://www.ledlight.com/t10-wedge-5-ultra-bright-smt-led-light.aspx and scroll down to the bulb 4SMD and you look at the base and you see the wires this one is wrong, look at the one above it this is right

Yeah i think every guide should mention that the little pins should match what the OEM bulb has.

My bulb pins were bent all the way back and I almost dimmer out

Has anyone done a UV mod on the dash? I think that would be super cool if done correctly.

Edit: Chad where did you get those LED headlights? I would love to get rid of those annoying old halogens.

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-Typos courtesy of my mobile phone.

so, guys. do these bulbs end up blowing fuses in most people's experience?

http://www.ledlight.com/t10-wedge-5-ultra-bright-smt-led-light.aspx

and how many are needed for the cluster?

does anyone have a link to the ledlight website for the direct replacement for the license plate lights?