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LED Bulbs for Exterior Lamps

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Old 11-09-2011, 12:53 PM
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zerMATT951
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Question LED Bulbs for Exterior Lamps

Can someone direct me to a list of bulbs used in our cars so that I can start shopping for high-quality LED replacements? I thought I'd seen a list of bulbs posted here in the past, but I've searched every way possible (with our crappy search engine) and come up dry. I've found plenty of threads discussing LED's for instrument panels, but not much for brake lights, turn signals, side markers, etc.

Yes, I am aware of the issues related to switching to LED's (relays, bulb aiming/reflectors/refractors, etc), and I understand the concerns... but with recent advancements there must be some useful options with surface mount (SMLED) bulbs that not only project straight out, but shine well in a full circle, even shining back toward the reflector in some cases. I'm hoping that a few Rennlisters have already done installs and are satisfied with the results, and that the overall light output is improved while not looking ricey.

Last edited by zerMATT951; 11-09-2011 at 04:11 PM.
Old 11-09-2011, 12:56 PM
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SuperBrightLEDs.com
Old 11-09-2011, 01:55 PM
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86 951 Driver
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If you use them in your tail lights your cruise will no longer work.
Old 11-09-2011, 02:26 PM
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was cruise control a popular option in the US?
Old 11-09-2011, 03:15 PM
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Originally Posted by 86 951 Driver
If you use them in your tail lights your cruise will no longer work.
What?
Old 11-09-2011, 03:20 PM
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Mine doesn't have cruise... FYI all my external lights were converted to leds (i think all but not positive) and my blinkers go very fast. Right is slower than left which is like double normal tempo. Don't know why it happens but it's kind of annoying...
Old 11-09-2011, 04:16 PM
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zerMATT951
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Originally Posted by Butters944
I'm not lacking for a source, that I've got. What I'm looking for is a list of bulb #'s and feedback on whether or not people have had good luck with new LED's while avoiding the "hot spot" look that most LED's provide.

Edit: I just checked out that website again and noticed the Vehicle Bulb Finder tool... pretty cool. Here's the list it generated for me:

Here's what they list (plus my translation to US bulb codes):
Back up light 7506 (1156)
Dome light 6411 (4410)
Front sidemarker 5008 (67)
Front turn signal 7528 (1157)
High mount stop light 7506 (1156)
Instrument-general 2721 (74)
License plate 3893 (BA9S)
Parking light 7528 (1157)
Rear turn signal 7506 (1156)
Stop light 7506 (1156)
Tail light 5008 (67)


Originally Posted by 86 951 Driver
If you use them in your tail lights your cruise will no longer work.
No problem. My cruise control unit doesn't fit with my fuel pressure regulator in that spot . Besides, if that was important, I suspect something could be rigged up with a relay.

Originally Posted by Butters944
Mine doesn't have cruise... FYI all my external lights were converted to leds (i think all but not positive) and my blinkers go very fast. Right is slower than left which is like double normal tempo. Don't know why it happens but it's kind of annoying...
The tempo can be corrected by switching from a mechanical flash module to an electronic flash module. I haven't started to search for that part yet, but they aren't all that difficult to come by.
Old 11-09-2011, 04:57 PM
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Here's a summarized list of just the exterior bulbs, grouped by common type:

67 x 4: Front sidemarkers, tail lights
1156 x 7: High mount stop light, rear turn signals, brake lights, back up lights
1157 x 4: Front turn signals, rear parking lights
BA9S x 1: License plate
Old 11-09-2011, 05:04 PM
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Originally Posted by Hollywood D
What?
I'm just letting him know. I have read a ton of other threads where this is true. I love having cruise for those long trips.
Old 11-09-2011, 05:59 PM
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i'm thinking of redoing my driving lights with LEDS and 6000 k Xenons. i would love to hear your ideas. i imagine for our cars, the fun starts with making a new lamp housing. as for the xenons, 6000 K in a proper setup is shows just a slight tinge of blue.
Old 11-09-2011, 05:59 PM
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Originally Posted by 86 951 Driver
I'm just letting him know. I have read a ton of other threads where this is true. I love having cruise for those long trips.
My 951 had no issues with LED bulbs all around... and cruise control... and I am sure it will function fine once she returns to the road!

Just sayin..
Old 11-09-2011, 09:14 PM
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LP944
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Originally Posted by Butters944
Mine doesn't have cruise... FYI all my external lights were converted to leds (i think all but not positive) and my blinkers go very fast. Right is slower than left which is like double normal tempo. Don't know why it happens but it's kind of annoying...
My rear blinkers were double the speed when the front ones were not plugged into the lights (forgetful body shop) So check if all of your lights work because most likely its because of that. It results in one light getting too much power
Old 11-09-2011, 09:55 PM
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Originally Posted by 86 951 Driver
If you use them in your tail lights your cruise will no longer work.
Its true.

Its the brake lights.

Originally Posted by JohnKoaWood
My 951 had no issues with LED bulbs all around... and cruise control... and I am sure it will function fine once she returns to the road!

Just sayin..
I think it depends on what LED bulbs you have, and what resistance they are.... but I can verify that the brake lights are connected to the cruise control. I have the cheap *** AutoZone LED bulbs in, and no CC. I think a better quality LED wouldn't have this problem (As most modern cars use the brake light bulbs hooked to the CC as a safety feature, so I assume LED manufacturers have fixed the problem).
Old 11-09-2011, 10:06 PM
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Originally Posted by m73m95
Its true.

Its the brake lights.



I think it depends on what LED bulbs you have, and what resistance they are.... but I can verify that the brake lights are connected to the cruise control. I have the cheap *** AutoZone LED bulbs in, and no CC. I think a better quality LED wouldn't have this problem (As most modern cars use the brake light bulbs hooked to the CC as a safety feature, so I assume LED manufacturers have fixed the problem).
It is suggested that you add resistors into the circuit to negate this issue.
Old 11-09-2011, 10:08 PM
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PS...

You should read this when deciding to convert to LED exterior lamps....
http://www.superbrightleds.com/cgi-b...bulb-notes.htm


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