Ed Scherer

I'm guessing there is... but I have no idea what it is. If you can get me a good photo of the bulbs (removed from socket would be especially helpful) and sockets, I might be able to advise.

IIRC, some of the bulbs on earlier cars were soldered in.

I seem to remember some posts on this topic (bulbs in earlier cars); if anyone could link to those here, that would be nice.

frankle951

My dash lights don't work, I will go with the LED lights, it really update the car !!!!

Hilton

My vague memory is that the bulb used for the shifter-illumination on early cars is the same as the red safety lights in the doors; a BA9 1.2W 12V bayonet bulb.

I could be wrong - as I've never owned an early car, and I'm going just from memory of reading rennlist posts. A search here for "BA9 shifter" might answer whether I'm right.

Tardis928

Hi Ed,
The PDF at:
Converting Porsche 928 Interior Lighting to LEDs

seems to be corrupt or the link is broken. Is posted somewhere else?

Thanks,
Greg

Ed Scherer

Howdy, Greg.

I just tried the main link at http://www.ed.scherer.name/Porsche_9...0to%20LEDs.pdf and it was OK. What exactly are you seeing?

Anybody else having a problem with that link?

Tardis928

All I get is just a blank white screen. My computer recently upgraded itself to IE11 and it has been quirky. So, if you say it is there, then maybe it is one of those undocumented features of IE11. I'll play with the IE11 settings some more.

Thanks,

Ed Scherer

Greg, you could also try (in IE11) right-clicking the link and "Save As..." to a file on your computer. Then double-click that file in Windows Explorer to open it up in Adobe Reader (or whatever other PDF reader you might have established for .pdf files).

Randy V

I read the initial post but not the follow-ups so this may have been discussed?

For the interior and under hood festoon bulbs it seems there are two different lengths.

Anyone know what they are and how many of each?

There are a total of 8: 2 doors, 1 overhead dome, 1 rear hatch, 1 glove box, 1 courtesy light in pax footwell (GTS) 1 overhead reading light between visors, 1 under hood light.

Thanks.

Ed Scherer

I believe the recommendations in the "Courtesy Lighting" section (near the end) of Converting Porsche 928 Interior Lighting to LEDs are all valid except the under hood bulb changed sometime after the '90 MY ('91, I think); '90 doesn't use a festoon for the under hood lamp. There's also a complication with that one. See the threads LED under hood lighting and New hood switch, strange light behaviour?. Looks like you'll need a 220 Ω load resistor in parallel with that under hood LED lamp.

Randy V

Thanks, Ed - that write-up is a thing of beauty. I need to add it to the FAQ if it's not already there.

The GTS under hood light is indeed an old fashion festoon bulb. May just leave it stock for now.

In Keith's write-up he recommends a brighter bulb for the forward 'map light' located between the front visors. Did you use a different type for that one?

I'm wondering why you chose the narrow beam type for the overhead hatch, rear hatch and CEL panel locations?

GT6ixer

Great write up Ed. Is that link to the latest version? I noticed that the Center Console and Courtesy Lighting sections just contain TOC information.

Randy V

Page 41 of that doc contains those sections.

GT6ixer

I saw that but thought perhaps he had a write-up with pics since the first page says "incomplete draft". Granted those items are just bulb replacements and the info on page 41 is what really matters.

Ed Scherer

Yes, it's the latest version. Unfortunately, I never completed those sections. Perhaps some day...

Nicole

IIRC, the original interior festoon bulbs were 36mm long. However, in that length there were no really bright LED replacements. So we used the 38mm long version, which was also available in different colors. It was a bit harder to install the longer bulbs, but one could shoehorn them in without too much effort. And because they don't create as much head as the original bulbs, the fixtures never buckled.