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Hi all, I understood that ALL OEM UK clocks had 2 potentiometers in them for speedo range and position adjustment and that Jap clocks only had 1, The reason I ask is that I have bought what are OEM UK clocks in appearance , but when you look at the dial there is only one Potentiometer which make me think they are Jap.

 

This combined with the fact that I took the OEM UK dial out of its cluster and put it in my Jap cluster for ease , only to find it did not work ( exactly the same circuit board on back of cluster between UK and Jap ) has me a bit lost .

 

Thoughts from anyone who knows ?

 

Ta

 

Sayers

From what little I know (from messing around with them myself), I thought the speedo had a single potentiometer. There's a screw at the top right of the speedo board (looking from the front) and that can be put in two different places which, apparently, has an effect on the clocks. The two-pronged plate that this screw fits into can be desoldered and moved around - there's a hole next to it and I think they have something like "5K" and "100K" written on them.

 

I personally haven't messed around with that though, so I could be talking complete tosh...

 

One thing I DO know though is that swapping a UK speedo into a JDM cluster will sort the speedo issue but, unless you swap the odometer as well, your mileage will still rack up in kms!

  • 4 weeks later...

only one little blue potentiometer and that screw plus the uk chip of course

See picture to clarify what speedo head is fitted to the cluster you bought, and check the tech link of mine below to see if that is your problem.

 

Which ever one you have there is only thread in one position so it cannot be moved except by changing the head.

 

http://www.300zx.co.uk/forums/showthread.php?175083-Speedo-soldering-tech

 

jap speedo.jpg

 

 

See picture showing screw thread position on speedo head for a UK spec unit below.

 

 

back of speedo head.jpg

 

Jeff

Edited by JeffTT

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