Defender TD5 Tacho/rev counter upgrade YAE100790
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- Опубліковано 17 лис 2022
- You may have seen my earlier videos of the Roamerdrive install. The main reason for installing a tacho (rev counter) is to keep an eye on the revs of the engine as sometimes I’ll forget to select the Roamerdrive or if I have left the truck in 4th! It doesn’t happen often! Also, it’s a reminder on how much better the truck is with the Roamerdrive installed.
Anyway, my video’s (There are 2 parts to this build so keep a look out for them both) show what I had to do to get this cheap tacho working on my truck, that doesn’t have ABS brakes incidentally. It does make a difference as the cables are coloured differently but it can still be done either way. I’ve included links to useful sites and to my Google drive which contains images of the plugs which may help.
The connector I started at was connector (Black) C0658 plugged into the ECU under the driver’s seat (RH drive).
www.lrworkshop.com/connectors...
Pin 19 cable (white and slate (grey) on mine) goes to connector C1048 Pin 14 on righthand side of the instrument cluster on my RH drive truck. The mating connector C1040 has no corresponding pin so I will need to add one. The pin type for the Sumitomo HD Series MT, DS, HD, HM 14-way connector (6098-0254) is 8230-4282 Male Terminals. I’ve included a link to eBay for these. These are suitable for .75-1.25mm cable.
I bought a cheap oil temperature gauge from which I expected to rob the white needle and put onto the tacho, this way all of the instruments will look the same.
Keep a look out for part 2 as it didn't work out for me! All ended well though in the end.
All information supplied as is. I’ve tried my best to pull all the info together and believe it is correct. If there is something missing or wrong, let me know and I’ll correct it. Remember this information is relevant to MY Defender, without ABS, yours might just be different!
Links below:
Tacho Ebay: www.ebay.co.uk/itm/283978300701
Tacho Amazon (Expensive!) amzn.to/3UA7AkU
Terminals Ebay: www.ebay.co.uk/itm/265108247086
White paint pen Amazon: amzn.to/3UzS6h1
Resistor Amazon: amzn.to/3EsNinV
Mustool MDS8207 scope Banggood: uk.banggood.com/custlink/mvKJ...
Mustool MDS8207 scope on Amazon (Expensive!) amzn.to/3EpW4D4
Nanocom: www.nanocom-diagnostics.com/p...
Very expensive genuine tacho: www.terraintechparts.com/prod...
Connector images, my Google drive: drive.google.com/drive/folder...
*Full disclosure. Some of the links above may earn a few pennies for the channel at absolutely no cost to yourself. Thanks for watching. * - Авто та транспорт
Great video and description, it’s a dry day so I’ll see what colour wires I’ve got!
Hi Jon, thanks for the feedback. It’s a good day here at the mo as well! Thanks for watching 👍🏽
Thanks a lot for the information contained through Tacho instalation. Well done. I have Landrover defender td5 1999 I did the same method to install myself.
Hi Walter. Thanks for the great comments and of course for watching, much appreciated 👍🏽
Hi Mike i used your guide to fit an ebay £17 tacho today (you might want to update your affiliate links as some dont exist now) my 2002 inconveniently didnt have the ECU to dash wire however i just ran another wire from pin19 to the tacho. added the resister you described (pack of 10 was the least i could buy 2 quid!) but for under £20 thanks to you i now have a functioning tacho for less than a tenth of the price of a "proper" one !! thank you
I’ll take a look at the links, thanks for the heads up. I’m glad you got your cheap upgrade. Mines still working great and very happy with the overall low cost. Thanks for the feedback and of course for watching👍🏽
Excellent info. Thankyou
Glad it was helpful! Thanks for the feedback and for watching 👍🏽
This is what I need! I’ve got a TD5 with an R380 with the V8 5th gear and the 1.211 disco transfer box. I’d love to see how low my revs are now at 60mph with the new ratios
Sound like a nice motor. A tad quicker than the engine I have! Thanks for watching 👍🏽
Hi Mike thanks for the great video just fitted this to my 2000 defender and works a treat. Did you ever dim the lighting down as you said its a bit bright compared to the other gauges .
It's on the list! I did add a couple of low value resistors in series with the back light power cable for the display but that is super sensitive to voltage variations so the brightness varied some what. I do need to revisit this as I do have another tacho unit I can experiment on. I also want to swap out the red led that lights the needle with a coloured one similar to the rest of the dials. I will get around to it but it's probably not going to be my next video. Thanks for watching 👍🏽
When you opened the second box (oil temp) I was expecting to see a tin of Airfix white, ho, ho.
Hi Ralph, that comes later! Thanks for watching 👍🏽
What is the reason for fitting the 10k resistor across the signal and feed connections?
Did you just guess at 10k or is that a calculated value?
Was your tacho originally designed to run from the W terminal on the alternator? I fitted one to my series 3 with a Thor 4.0 V8 engine in and when using the ECU signal the tacho reading is reading too high (1200rpm at idle and around 4000 at 70mph).
Any ideas what I can do to get the reading to match the engine speed? Cheers.
Hi Big J. I believe the output from the ECU is what's called " open collector" www.electronics-tutorials.ws/transistor/open-collector-outputs.html
so you need a "pull up" resistor connected from the ECU output to 12v+. A 10k resistor seemed to be a good starting point as it is a high enough value not to do any damage or "load" anything too much. Anything between 1k to 10k is a normal value to use so as I said I started high and it worked so left it there. Yes, the tacho was designed to be connected to an alternators W connector. On this actual tacho there is a blue calibration adjuster pot on the back. I simply adjusted this to a know rev output (Idle in my case using a Nanocom set to RPM for reference) and everything else fell in place. I hope this helps, thanks for the comments and for watching 👍🏽
Brilliant thanks very much 👍
Hi Mike, thanks for such a detailed video! I bought my 2002 110 Td5 18 months ago and it has been fitted with a VDO tacho. They have run a single wire from it, out of the bulkhead and underneath and back into the underseat box and spliced on to the black ECU connector. A bit of a bodge, so I will trace the wire through the connector and can remove the wire to make a much neater job, cheers for the info.
Also, mine has a disco transfer box fitted (1.211 ratio) and it sits at 2,300 revs at 70 MPH in 5th, so would be interested in seeing what revs you get with your roamerdrive.
On another note, I can see you have a MUSTOOL MT8208 scope? How well does it perform, and can you recommend it?
I have on old tube Tektronix dual channel storage scope, and as you can imagine, its HUGE, and very heavy. I need to sell it as I do not use it often and that little meter you are using sounds like an ideal replacement for my needs.
Keep up the great work, your videos are really good and informative 👍
Hi Sean thanks for the great comments, they are very welcome. Before the Roamerdrive @60mph the rev's were 2400rpm measured on the Nanocom. With the Roamerdrive fitted and engaged its around 1900rpm. Roamerdrive say there is a reduction of 28% across all the gears which sounds about right to me. I bought the MT8202 especially for this job (Tacho) as I was a bit worried about using a mains powered one and somehow blowing the ECU. As you can see it worked very well for this application. I would say it depends how in depth your future scope use needs to be as this scope is quite basic but for me it did the job I needed it to do and will be used on future projects. I do have a "proper" scope if need though. Remember if you have ABS the colours of the cables may be different to mine but I do suspect there will be a cable to pin 14 (I think) in the instrument loom like mine you could use but every Defender is different. Good luck and thanks for watching 👍🏽
@@MikeMakesIt thanks Mike, forgot to say, mine does not have ABS either,so hopefully will be the same wiring. I will keep an eye on the scope multimeter to see if I can grab it for a good price 😎
hi Mike finnaly got mine in and working brilliant .. just one thing is it poss to dim the leds at all its quite bright at night ? 😅
Hi Peter, I put a resistor in series with the cable for the backlighting for the tacho. It did help a little but the needle I believe is powered directly so this doesn’t dim. It’s still a little too bright for me and I need to revisit this issue but so far haven’t had the chance to. I think I tried 470ohm resistor then altered the value until I got something I liked. Remember the resistor has to go in series (in line) with the cable that connects to the lighting circuit.
@MikeMakesIt ok Mike thanks will have a look into again didn't look to much inside so not sure if there's several leds or not hoping I can black out some of them lol 😉
I saw in a forum some ppl use a 3k3 resistor. Which one should we use
3.3k should work ok but I know the value I picked worked worth my setup.
was going to do this one day but got a nanocom that shows the rpm
Hi Roza, I used a Nanocom for a while, indeed when I was doing the upgrade to set the new tacho but I always had to go into the Nano's menu and set for revs where as this option is a bit more streamlined. Thanks for the comments and of course for watching 👍🏽
hi don't suppose you could sell me a tacho with the pull up resistor attached ny any chance or send me a pic on how to fit it ? cheers pete from doncaster 😊
Hi, I'll have look to see what pictures I have that may be useful, give me a couple of days.
Right, I've looked though my info but don't actually have a photo of the pull resistor fitted. Here are 2 links to my 2 videos where I mention the resistor though. With my tacho I needed to add it, possibly on other tachos you don't. I connected mine between the 12v+ feed to the tacho and the signal lead from the ECU on the inside of the tacho for neatness. It was a 10k value resistor. I hope this helps ua-cam.com/video/sdUa6Rgptww/v-deo.html and ua-cam.com/video/1yPJ1bo2NYw/v-deo.html
@@MikeMakesIt does it matter which way round the resistor goes Mike?? cheers pete
@@peteroliver585 Hi Pete, no it doesn’t matter so long as it’s on the correct terminals/connectors.
@MikeMakesIt ok Mike thanks will get one ordered off ebay sorry for all the questions lol .is it just a normal 10k resistor ?