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  #1  
Old August 11th, 2004, 02:09 PM
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Cool Bouncing Odometer - Finally Died

Well I got along there for some time with the dancing/bouncing/intermittent reading on the odometer, but I haven't seen a life sign in about two weeks now. Last time I saw a number it still seemed to be reading right.

What have people done about this - just replaced the whole speedo? From who? VDO alternative? Hmm.

What's clear is that the number is still "in there (where?)" somewhere, and perhaps one could just replace the LED screen. Hmm?

Any ideas, input greatly appreciated.
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  #2  
Old August 11th, 2004, 03:09 PM
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VDO seems to be the best option as it has been discussed at lentgh on this forum. I think George (RDS) had the Genuine speedo a while back it may be worth a try to contact him.........
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  #3  
Old August 11th, 2004, 03:48 PM
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Last month he had one for a '97 at a good price. I just had to replace mine for a '94 for the exact same symptoms.
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  #4  
Old August 11th, 2004, 04:38 PM
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Matthew Michaels
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Swapped Mine Out

Mine did the same thing . . .

I put out a reply on Wanted - and was contacted by someone who had a Stock Sppedo lying around (I assume from taking theirs out). The thing had caulk all over it (which is good because my hardtop gets LOTS of water inside) - and through several dousings there are no problems or blinking . . . .
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  #5  
Old August 11th, 2004, 08:18 PM
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Barry O'Mahony
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Mine did the same thing. I took the speedo apart. The liquid crystal display connects to the PC board via a "flex circuit", i.e., conductors on a flat piece of plastic. It goes to a special connector on the PC board; the flex circuit is inserted in the connector and then a locking ring is pushed down to lock it in place. I re-seated the flex circuit and all is OK now.

Obviously with this many complaints, there is a design problem here. I strongly caution anyone considering doing this, however, that these are very delicate components (the flex circuit and connector) and easily damaged. Unless one has alot of experience handling and fixing PC board electronic equipment, it's best to take out the speedo and take to a speedo repair shop and let them deal with it.
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  #6  
Old August 11th, 2004, 11:47 PM
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Ahhhhhh. Barry - that's what I was hoping to hear. I shall open mine up presently. I used to overclock my own Macs back in the day, so I should be OK.

Did you notice the odometer was clealry continuing to track in the chip or whatever and all seemed normal once the display was back on-line?

Follow-up Post:

How did you get the bezel off?

Follow-up Post:

Done, odometer FIXED, perfect, original count back on screen. Barry is the MAN. THanks!
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Wicks | 1st pl Nevada Trophy 2004 & 2003
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  #7  
Old August 12th, 2004, 05:36 PM
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Yup, the bezel removal is the trickiest part. The "jeweler's screwdriver" method is what I used as well.

'glad I could be of assistance.
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  #8  
Old February 15th, 2005, 08:43 PM
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Died again. What do I do now. Dancing constantly.
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Currently no Land Rover - hunting for the perfect white SIIA
2015 G550, 73 911s, 06 BMW GSA, 06 Ducati Paul Smart, 73 Moto Guzzi V7sport
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  #9  
Old February 16th, 2005, 08:55 AM
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When I had a similar problem on a J**p it was the speed sensor. Makes sense when you think of an electronic componant down in all the crap under the vehicle.
John
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  #10  
Old February 16th, 2005, 01:29 PM
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Barry O'Mahony
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Mine died, too.

When I get it back from the body shop, I'll need to try to fix it again.

I noticed the contacts at the very end of the flexible connector were pretty worn. I'll try either painting some conductive paint on them (the stuff they use to fix PC boards), or I'll just trim a little bit off the end, so that it sits down lower in the connector, and the connector makes contact with parts of the flex that aren't worn.

You'd think that, with VDO's reputation, we wouldn't have these problems.
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  #11  
Old February 16th, 2005, 03:56 PM
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Can you upgrade a 94 to a 97 speedo?

Larry
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  #12  
Old February 16th, 2005, 06:37 PM
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Quote:
Originally Posted by BarryO
I noticed the contacts at the very end of the flexible connector were pretty worn. I'll try either painting some conductive paint on them (the stuff they use to fix PC boards), or I'll just trim a little bit off the end, so that it sits down lower in the connector, and the connector makes contact with parts of the flex that aren't worn.

Forget the trimming. paint the contacts, refit the connector and put some silicone on the mating point so there's no movement.
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  #13  
Old July 26th, 2006, 06:25 PM
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Barry - did you ever try this with the trimming or paint - or what Arthur said?
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  #14  
Old July 27th, 2006, 02:38 PM
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Not yet, but I'm doing it this weekend. I'll let you know how it goes.
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  #15  
Old July 27th, 2006, 03:58 PM
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I did just like the pics but cleaned the connection and it brought mine back to life. It is not that difficult.
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  #16  
Old July 27th, 2006, 04:04 PM
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A run of silicone keeping the connection tight is really worth it. This trick is commonly used in portable computer systems (no, not laptops) to keep IDE/SCSI and similar ribbon cables from becoming disconnected during rough carriage.

And it's totally undoable of course.
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  #17  
Old July 28th, 2006, 09:24 AM
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How long does this take to fix?
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  #18  
Old July 28th, 2006, 01:01 PM
Matt Taylor
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Could somebody walk the more retarded of us through what Wicks was doing in that series of pictures?

Specifically:

1) How'd he get the bezel off

2) What electrical connection was he repairing

Thanks. I'd like to take a shot at this soon.
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  #19  
Old July 28th, 2006, 01:41 PM
BarryO
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Matt,

I promise I'll take pictures this weekend.

If I remember correctly, the bezel just kinda pries off. You need to get it off to take the speedo apart.

The connection that's being repaired is the one from the odometer display itself, to the main circuit board of the speedo. It's a "flex circuit"; i.e., the connectio to the display isn't a cable, it's a pice of mylar with copper traces on it. It attaches to a connector on the circuit board; when that connection goes bad, the odometer display gets flakey. The last time I fixed this, I just took the flex circuit out of the connector (you need to unlatch a locking mechanism first), and re-seated it. That fixed it for awhile, but it's not a long-term fix.

This seems to be an extremely common problem with the speedos in the '97's.
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  #20  
Old July 28th, 2006, 01:57 PM
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Thanks, Barry. That clears it up a bunch.

Looking forward to the pictures.
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