When I had my cluster apart to fix the speedo, I decided to go for
flexibility, and replaced the bottom row of dummies with 5 dual
red/green LEDs. There's just enough space in there to wire them up to a
ribbon cable. On the other side of the cable is a DB-9 connector, now
accessible from below the dash.
One LED is now wired to WOT, as for the other 9... I had this brilliant
plan... They were going to outlaw radar detectors over here... so I was
going to do a stealth install... hack a detector apart, mount the guts
in the engine bay next to the radiator, and rig the display to use my
LEDs in the cluster. But then the government preempted it by backing
off, so I never got around to actually doing it. Anyone have any ideas
for alternative applications? 5 red LEDs and 4 green ones, at my command?
While we're on the subject of cluster mods, I also upgraded the high
beam indicator -- the stock setup uses a plain old filament bulb with a
blue filter cap. I replaced that with a 5mm blue LED: looks better and
lasts forever (Not that I ever heard of that particular bulb burning
out, but still...) If you do this, you also need to trace its power lead
on the PCB, and splice in a 1K resistor (there's a convenient spot for
it right next to where the resistors for the stock LEDs are.)
And yeah, I replaced the top instrument bulbs with high-power white LEDs
(with a blue filter strip), and some bright red (AlInGaP) LEDs for the
clock/MFA backlight. Also inverted the clock display while I was at it
(black background, red digits). What can I say, I had too much time on
my hands back then... but it looks damn good now. Plus, I don't have a
single filament bulb left in the cluster, so I hope to never have to
take it apart again.
Cheers,
Oleg
Nice job Denis. I need to take my dash apart to replace the instrument
lights anyway. I'll have to rig a regular led in there because the '88
models don't have the oxs reset circuit.
Anyone know the replacement light bulb part numbers for the instrument
lights?
Rich Blake
-----Original Message-----
Rich,
Below are two pics of my LED indicator light, to show
when my TT box is actually working...
http://dpgoldman.com/volkswagens/images/new/fullthrottle.jpg
http://dpgoldman.com/volkswagens/images/new/160mph.jpg
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