cesar

I was just driving along, and all of a sudden noticed that the whole thing went dim. It was a nice bright yellow and now it's dim to the point that you have to squint to see the numbers.

Went up and down through the menu, turned lights on and off and nothing changed.

Any ideas?

Cesar...........

Kevin

Diode blew.. Send it to North Hollywood Speedo.. They can fix them.

Peter S 993tt

No - it is not a diode. You have to remove the steering wheel to get the tach out. Once you do - you can replace the light bulb yourself.

Kevin

As Peter said you can check the bulb. But if you do a search about the OBC, you will see that the dimming light may lead to the diode.

Warning. When attempting to remove your speedo, make sure that you disconnect your battery. Prior to removing your steering wheel. If you don't you will trip your airbag light!!

Peter S 993tt

Yes - I should have mentioned that part.

BTW - it is a royal pain for a very cheap part.

dbf73

Just a thought - can you get at the OBC light bulb while the tach is still in the dash by pulling the speedo? Seems you might be able to reach in through the speedo hole, pull the tach out a bit and rotate for best position. I'd rather not mess with the wheel and airbag if I don't have to.

79hotrod

Had the same problem. replaced the bulb. No more problem.

Rob 97 993c2

my OBC went dim and then came back to life by itself a day later.

should i assume the bulb is going dead, or a bad connection?

don356

Had my display go dim then not at all. Unfortunately it was not the bulb. Sent to N Hollywood Speedometer who "repaired" it for a reasoable $95 ..... except that it still didn't work. Hergesheimers in Lake Forest CA sent it out to someone they know who repaired the circuit board ... otherwise a costly replacement.

Full Boost

Juat another thought.....

My buddys' TT had the same issue..... After a S@^tload of $$ and time and effort spent it was a bad earth.....

Simon

Kevin Ross

Don't mean to hijack this thread, but my display is great except for one verticle line which intermittently goes dim...

888 then looks like 883

it's a PITA but is it worth fixing?

cesar

I have yet to fix mine. I look at the speedo instead. The digital read out was nice. I know it works, just dim.

Going to have it looked at real soon after an attempt myself at it.

I guess if you get used to looking at the speedo, at least when you drive a Porsche without without the OBC, it's not that bad.

Peter S 993tt

If the display works - and it is dim - then you have a blown bulb - you need to disconnect the battery, remove the wheel and stalks, etc. to get the tach out. Then you can replace the bulb. Just don't forget to disconnect the battery.