Supplies for Speedo correction? - BMW Luxury Touring Community
 
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post #1 of 8 Old Aug 8th, 2013, 7:42 pm Thread Starter
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Supplies for Speedo correction?

Since I have the LT torn apart for a variety of things I'm working on, I figured I might as well perform the speedometer correction fix too. I'm having trouble finding the 24 ga solid copper conductor as called for in the instructions. I found 24 ga pretinned solid bus at Radio Shack......will this work? Where can I get the copper wire that is called for?
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post #2 of 8 Old Aug 8th, 2013, 7:47 pm
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Re: Supplies for Speedo correction?

As long as an electrical connection is made across the solder pads, it will work. Make sure all locations match or are jumped as in the H.O.W. picture. I did the mod and only jumped one location, per instructions, and the mod didn't work. I did another teardown looked again at the picture versus the back of my speedo and noticed my speedo needed to be jumped in two locations.

HTH,
Jer

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post #3 of 8 Old Aug 8th, 2013, 8:00 pm Thread Starter
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Re: Supplies for Speedo correction?

Jer,

Did you have some old instructions that only called for one jumper? I looked at two different sets of instructions and both called for two jumpers.....one at the JB location and another at the JC location.

Now that you've completed the fix, is the speedo working as it should?

Jim
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post #4 of 8 Old Aug 8th, 2013, 9:53 pm
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Re: Supplies for Speedo correction?

The fix works. Any strands of copper wire will work. The span is so small that when you solder them the wire will 'tin' all the way across and make the bridge anyway. Just snip a few strands off of any small gauge wire you have laying around, nothing special.

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post #5 of 8 Old Aug 8th, 2013, 10:48 pm
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Re: Supplies for Speedo correction?

Quote:
Originally Posted by Jim_B
Since I have the LT torn apart for a variety of things I'm working on, I figured I might as well perform the speedometer correction fix too. I'm having trouble finding the 24 ga solid copper conductor as called for in the instructions. I found 24 ga pretinned solid bus at Radio Shack......will this work? Where can I get the copper wire that is called for?
already answered...but a bit more detail.

"tinned" wire is (almost always) copper wire with a thin layer of solder already on it. It makes soldering a bit easier, probably a lot easier if you are a novice at it.

Almost all electric wire is copper. For very large wire (household feed wire), you sometimes see aluminum, for very fine wire, you sometimes see gold or silver (actually, you don't see -- it's buried inside components). I'm sure there are exceptions, but they ain't common. (Different story for non-electrical wire, like craft wire, but the last spools of that I saw all said, "not for electrical use" -- and for this application, if you could get the solder to stick, it would work Just Fine.)

The thickness won't matter either, not for the tiny amount of power being carried.
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post #6 of 8 Old Aug 11th, 2013, 11:55 am
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Re: Supplies for Speedo correction?

Quote:
Originally Posted by Jim_B
Jer,

Did you have some old instructions that only called for one jumper? I looked at two different sets of instructions and both called for two jumpers.....one at the JB location and another at the JC location.

Now that you've completed the fix, is the speedo working as it should?

Jim
Hi Jim,

You're probably correct in what you read. I suffer from being an electronic tech in a past life and thought each pad had its own identifier, so JB - JC was a single cross connection. I was a newby owner at the time and was very intimidated with the whole project. Wrenching is not something I'm that experienced with. Glad to see you, and probably everyone else, noticed it was two seperate jumper locations.

Thanks,
Jer

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post #7 of 8 Old Aug 12th, 2013, 1:11 pm Thread Starter
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Smile Re: Supplies for Speedo correction?

After taking the speedo apart and seeing how tiny everything was, I found it much easier (and cheaper) to just take the speedo to a local TV repair shop. The tech soldered some copper wire in place for me. He soldered both jumpers in about 30 seconds. I'm sure it is a much better job than I would have done and it cost me a whole $5. Can't wait to get it on the highway and see if it worked.
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post #8 of 8 Old Aug 12th, 2013, 1:20 pm
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Re: Supplies for Speedo correction?

That is great news and a good idea for those that are not familiar with soldering small stuff!!Hope you like the change.

John
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