LEDs for Nissan Sylphy Hi Stop Light

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ADKM

847 posts

Ultimate Geek

#272284 17-Jun-2020 20:55

Anyone know what wattage (brightness?) these might be? I have the high stop assy in pieces and one of the red LEDS is o/c.

Also looking for a source. I rang Jaycar to be told they 'dont sell LEDs' yet on line they show 149 of them! Maybe none are suitable but any red one of similar brightness to the rest would probably do.

Thanks.

Fred99

13684 posts

Uber Geek

#2507115 18-Jun-2020 10:37

They certainly do sell LEDs. Plain red LEDs need ~2.3v - so you'd need to see if the LEDs are 12v (ie with a built-in resistor or driver) or unregulated.

This for example, unregulated (so would blow if connected directly to 12v) and "pretty bright" at 4000mcd (ie much brighter than you'd probably want as a power indicator light on a device, maybe ok in an array as a high stop-light) nominal 2v, 510 ohm resistor recommended to drop voltage from 12v.

https://www.jaycar.co.nz/red-5mm-led-3800mcd-round-clear/p/ZD0154

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richms

26413 posts

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#2507119 18-Jun-2020 10:44

How about some pictures of what you have because jaycar sure do sell LEDs, they have them behind the counter in little draws at the one I infrequently go to. Guess they are so valuable when sold there. Old cars just seemed to use standard 5mm ones in an array with them in series of 4 or 5 and then lots of those in parallel with resistors either on each string of 4 or 5 or a few of them with multiple strings off them. Lost count of the late 90s cars I have changed the LEDs in for friends, but they were always fixed up with some clear cased red high intensity ones that back then (pre aliexpress) I got from china off ebay in bags of 200 or so.

Richard rich.ms

ADKM

847 posts

Ultimate Geek

#2507265 18-Jun-2020 11:41

There's small circuit board with 2x 39 ohm resistors, a capacitor and a diode.

Then a metal strip with 3 series sets of 2 in parallel. I'm yet to take some voltage measurements.

Scott3

3340 posts

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Lifetime subscriber

#2507276 18-Jun-2020 12:06

ADKM:

There's small circuit board with 2x 39 ohm resistors, a capacitor and a diode.

Then a metal strip with 3 series sets of 2 in parallel. I'm yet to take some voltage measurements.

Guess and check?

https://www.jaycar.co.nz/red-5mm-led-3800mcd-round-clear/p/ZD0154

Solder it in, and see if color tone and brightness is passable. If not go shopping again for a more or less bright one.

Fred99

13684 posts

Uber Geek

#2507282 18-Jun-2020 12:17

Why the one red encapsulated LED - but 3 clear encapsulated LEDs. Wouldn't have come that way out of the factory - nor with dodgy looking solder job - so presumably one has been replaced in the past.

richms

26413 posts

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#2507300 18-Jun-2020 12:44

Or get a length of red LED strip and jam it in there.

Those look to be pretty powerful LEDs and that little 5mm one will not like that much power, assuming the 39 ohm LEDs are in parallel thats probably 1w per led.

I would get some red 1w luxeon style ones to put in there. - this kind of thing https://www.aliexpress.com/item/4000001524417.html (not endorsing that seller just images that match what I would replace it with)

Richard rich.ms

ADKM

847 posts

Ultimate Geek

#2507303 18-Jun-2020 12:46

There's 6 altogether. The red one I tacked on temporarily to compare, but it was way too dull.

BTW Nissan only want $500 for the while unit! Don't imagine they'll be run of their feet...

I found a place in Nelson with replacement LEDs $5 each. It may be an would have done but apparently these are the 'right' thing used in many cars. I'll replace the lot so they're all the same.