 | Home > Technical > Running up td5 odometer mileage? |
 
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967  
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Ok just purchased set of td5 instruments for my 300tdi
 Click image to enlarge I'm happy with how to wire it all in following retro anacondas how to guide. What I'm not sure how to do is adjust the mileage. There is a thread on lr4x4 showing a run up circuit but I don't really understand it, or have the tools to program a chip. Anyone done this recently? I need to run up 110k My 109 thread my youtube channel |
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8th Jan 2015 2:36pm |
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| gilarion Member Since: 05 Dec 2013 Location: Wales Posts: 5110  
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Why run up the mileage, just make a note of the present mileage on your old unit, there is nothing in law about changing your speedo odometer, it’s perfectly okay to change the odometer by replacing with a used unit. However, it is illegal to roll back or misrepresent the mileage without disclosing to a potential purchaser of your vehicle that the odometer has been changed. Keep your Mot’s to show any prospective purchaser in the future what you original mileage was.
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8th Jan 2015 3:23pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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munch, for me there is a HUGE difference, looks better, million % better illumination, smooth speedo, and illuminated heater controls!!
gilarion, thats probably what i will do if i cant find a simple solution, but it would be nice to have it all correct ! My 109 thread my youtube channel |
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8th Jan 2015 3:41pm |
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| Peter Td4 Member Since: 23 Oct 2010 Location: Antwerp, Belgium Posts: 227  
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I've done this once for a friend who upgraded his 200Tdi dash to the Td5 dash
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The difference in distance requested was something like 250k 
So I designed a little electronic circuit to make this possible. I should stil have the hardware lying around. Need to check this. If you could point me to the thread on this other forum, perhaps I can help to explain ? Sending over the odometer to Belgium will be a bit costly, otherwise I would be happy to do this for you. Peter, Defender 110 StaWa - Td5 Defender 110 HCPU - Puma Defender 90 Soft Top - Td5 |
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8th Jan 2015 5:38pm |
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| steventheplumber Member Since: 29 Apr 2014 Location: Lincolnshire Posts: 767  
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G-mack I would love to update my dash, will do it one day. Best of luck
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8th Jan 2015 6:16pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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hi Peter,
this is thread http://forums.lr4x4.com/index.php?showtopic=69070e im clueless when it comes to these things! apparently hitting it with a hammer wont work  My 109 thread
my youtube channel Last edited by g-mack on 8th Jan 2015 6:50pm. Edited 1 time in total |
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8th Jan 2015 6:41pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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thanks steven
My 109 thread
my youtube channel |
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8th Jan 2015 6:41pm |
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| gilarion Member Since: 05 Dec 2013 Location: Wales Posts: 5110
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To many t's andf h's try this http://forums.lr4x4.com/index.php?showtopic=69070e |
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8th Jan 2015 6:47pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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thanks mate, don't know how i managed that!
My 109 thread
my youtube channel |
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8th Jan 2015 6:50pm |
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| gilarion Member Since: 05 Dec 2013 Location: Wales Posts: 5110
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No probs
Though maybe this is easy for some, but not for me! 
Right were do we start...... Firstly my appologies if this has already been covered in the forum and iv not seen it. Im following in the footsteps of the retroanaconda and his good work on investigating installing TD5 instrumentation and Speedo into older defenders so you can see your gauges at night. Only the speedo I got off ebay had 64k on it and my 90 has 97k. I like to keep things right so decided to up the mileage to 97k. Some dont bother, some take photos for the history of the vehicle. Others look and either say dont go out at night or if it aint broke dont fix it. Some may even send there speedo to ETB instruments or digi dash or what ever they are called these days and pay to have the reading changed. (This is the only way I know of to have the mileage reduced) Firstly the speedo transducer.... How do we replicate its signal... What does it do. In short the "A" pin of the speedo transducer connects the signal wire from the speedo to earth 4 times per rev of the transducer. so one 360 of the transducer goes N/C earth N/C earth N/C earth N/C earth. this can be confirmed using a multi meter and putting it on beep test connecting one lead to earth and the other to the wire connected to the A pin and spinning the transducer in your hand. The transducer will need powering up for this. I read else where in this forum that the transducer gives 4100 pulses per mile. Iv read about people putting the end of a transducer in a drill to spin the mileage up which seems like a good idea untill you need to add more then a couple of thousand miles to it. Knowing the the transducer connects the speedo to earth to pulse it mad my task easier as i had some components in my electronics draw that specialised in connecting things to earth. up to something daft like 34v and a fair few milliamps. I also had a PIC Micro controller and an EASYPIC 6 development board. so i wrote a small program to turn on and off a pin on the pic chip about every 7 milliseconds which i worked out should be about 120mph on the speedo. My code in Mikrobasic for pic Program Speedo main: ANSEL = 0 ' configure AN pins as digital I/O ANSELH = 0 TRISC = 0 ' set PORTC to be output PORTC = 0xAA portC = 0 while true PortC.0 = 1 delay_ms(1) portC.0 = 0 delay_ms(2) wend end. Now in the above code the ms delays are less then 7ms and the reason is because when i powered it all up the speedo showed less then 50mph. I put this down to me running the chip with its internal clock rather then a 8 or so mhz oscillator which would be more accurate. anyway the above settings give just over 120mph. This should give me my desired mileage in a week or so. (im not in any rush) The components you will need to make this circuit are.... 1x PIC16F887 ebay or maplins 1x ULN2803 (18pin chip) ebay 1x tripad board from maplins oh maybe some connectors if you intend to make it re usable... there again you could solder your link wires directly to the board it wouldnt make alot of difference.I run this from a power supply that gives out 5v and 12v. if you dont have one of these look at adding a "7805 voltage  |
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8th Jan 2015 7:33pm |
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| shaggydog Member Since: 12 Aug 2012 Location: Kent Posts: 3347 
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Out of interest what existing dials do you have?
Are you planning on keeping them or transferring them over? Running Restoration Thread http://www.defender2.net/forum/post323197.html#323197 Self confessed mileage hunter  |
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8th Jan 2015 7:42pm |
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| Retroanaconda Member Since: 04 Jan 2012 Location: Scotland Posts: 2642 
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The mileage is fairly easy to change if you have access to an EEPROM reader wotsit. PM Cwazywabbit on the LR4x4 forum, he has changed many speedos for people.
You can clock on the speedo with a circuit or micro controller but it takes ages as above. |
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8th Jan 2015 7:58pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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shaggy, im replacing complete instrument binnacle. so speedo, fuel, temp, clock, warning lamps My 109 thread
my youtube channel |
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8th Jan 2015 7:59pm |
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| g-mack Member Since: 07 Jan 2014 Location: northumberland Posts: 1967
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Problem solved!! Found someone to do it for a nominal fee! My 109 thread
my youtube channel |
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8th Jan 2015 9:47pm |
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