Speedo now reading in reverse

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Originally Posted by AB

Well finally something has gone right. Fixed the speedo using highly advanced tooling. I just took it down the street and did the usual banging dash as I have done a hundred times but to no avail. I finally cracked it and smashed the top of the dash pretty hard and it bounced back to the other side and is currently reading exact speed...lol Not sure how long that will last for but one problem temporary solved for now!

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On ya FONZ....... Eeeeyyyyyyyyyyy

Your a rough man AB, after all your GQ does for you and this is how you treat it..........LOL

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Originally Posted by Yendor

Your a rough man AB, after all your GQ does for you and this is how you treat it..........LOL

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I know I know...lol

You should see it now Rodney, if the previous owner saw it now I would get a backhand. When we shook hands he said to me I'm happy it's going to a good bloke who will look after it.

I'm still following the tradition of putting the Anzac badges on the visor but aesthetically it's looking rough. Don't get me wrong mechanically it's absolutely sensational.

When my speedo played up - I actually pulled the dash apart and wnet for a drive while tapping the board - its how I found the intermittent problem.

I would give the board an eyeball and check for cracked solder joints.

I found I had a the legs on the crystal where corroed and intermittent.

I replaced the xtal with a 4.097 it 4.19 on the board

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Originally Posted by GQ TANK

When my speedo played up - I actually pulled the dash apart and wnet for a drive while tapping the board - its how I found the intermittent problem.

I would give the board an eyeball and check for cracked solder joints.

I found I had a the legs on the crystal where corroed and intermittent.

I replaced the xtal with a 4.097 it 4.19 on the board

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Where did you source the crystal, Tank?

AB check this thread out from Dale mate http://www.nissanpatrol.com.au/forum...26188-Gq-stuff

I got the xtral from work - it was on a old circuit board.

I only found a online mob in ebgland that had the 4.19 mhz on the sehlf. But as the 4.097 rock worked you might be able to get one that is close from RS components

I will check them out, thanks.

I have built a simple speedo signal generator, and have been able to replicate the problem on the test bench.

When the speedo is sitting at 100- 110kmh and the supply voltage is interrupted, the needle drops to the wrong side and begins to play up. This test points to there being an intermittent bad connection in the supply circuit.

I popped the plastic cover open and used a small piece of hooked wire to lift the needle back and it works perfectly now.

If the problem recurs, at least you have a starting point to begin trouble shooting.