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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605   
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As I said earlier in the thread you can't read the voltage with a multimeter, you need a pull-up which is in the Rev counter's circuitry.
You can read it (or put a scope on it) with the rev counter connected as then the rev counter is pulling up the signal. If your multimeter has a frequency setting you can also try it (gauge connected still) but whether you get a reading depends what it's cutoff frequency of the meter is.  1988 90 Td5 NAS soft top
2015 D90 XS SW |
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12th Aug 2018 7:13pm |
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| dobbo Member Since: 15 Jul 2018 Location: hornsea Posts: 4 
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Hi guys just wondering if you can help and advise with my installation of my rev counter for my 2004 td5 defender. I'm getting 1.3 volts from pin 19 in the ecu I was told I should get 6 volts, the gauge is wired in as per instructions from CAI and it's doing a sweep with ignition on returning to zero and staying there with engine running.
Any help appreciated I did think my multimeter may not pick up the pulse but not sure now. Any help appreciated Cheers Paul |
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16th Aug 2018 7:22am |
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| LandymanStefan Member Since: 30 Aug 2017 Location: Surrey Posts: 881  
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That makes 3 of us then
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16th Aug 2018 8:11am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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Sounds like an issue with the rev counters themselves
Anyone local to any of you with a known working Td5 rev counter who could do a quick swap and test? I have one but a bit far to nip round to check  1988 90 Td5 NAS soft top
2015 D90 XS SW |
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16th Aug 2018 8:48am |
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| Clive Member Since: 21 Mar 2014 Location: Littleborough Posts: 467 
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I'm beginning to wonder if the tachos in question are set up correctly, the instruction sheet indicates that there is an 8 way DIL switch inside to program it to the engine parameters, the sheet isn't specific about it but I wonder if one of those switches determines a pull-up on the input?
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16th Aug 2018 9:16am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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Genuine Td5 ones don't have any switches to configure.
Any photos of part number labels and/or the back of the counters people have received from CAI? Happy to compare against my genuine one. 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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16th Aug 2018 9:24am |
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| Clive Member Since: 21 Mar 2014 Location: Littleborough Posts: 467
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The instruction sheet says "... programmed via eight dil switches located beneath the grommet to the rear of the instrument ..."
I can whip mine out, (the tacho  ) and take a picture if it helps.
I should just add, mine worked straight away, "out of the box". |
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16th Aug 2018 9:33am |
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| LandymanStefan Member Since: 30 Aug 2017 Location: Surrey Posts: 881
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When I messaged them I got this, I haven't had a chance to remove the rubber bung and play with the switches yet but gerrardtd5 told me he tried it and had no luck
Click image to enlarge |
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16th Aug 2018 9:36am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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Sounds a bit like CAI may have shipped standard diesel type counters with Td5 dials  1988 90 Td5 NAS soft top
2015 D90 XS SWLast edited by Martin on 16th Aug 2018 9:41am. Edited 1 time in total |
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16th Aug 2018 9:38am |
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| LandymanStefan Member Since: 30 Aug 2017 Location: Surrey Posts: 881
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But if Clive's worked straight from there then that's not the case.
Unless our batch is different to Clive's?? |
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16th Aug 2018 9:39am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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Sorry missed that in Clive's post
1988 90 Td5 NAS soft top
2015 D90 XS SW |
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16th Aug 2018 9:41am |
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| Clive Member Since: 21 Mar 2014 Location: Littleborough Posts: 467
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Maybe mine was just set up correctly originally and missed on the others?
Anyway, here's the back of mine, (cropped from earlier picture,) I'll need to take the binnacle out to check the switches, that will have to wait for now I'm afraid. Click image to enlarge |
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16th Aug 2018 9:50am |
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| Martin Site Admin Member Since: 02 Apr 2007 Location: Hook Norton Posts: 6605
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Totally different to the genuine one:
Click image to enlarge 1988 90 Td5 NAS soft top
2015 D90 XS SW |
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16th Aug 2018 10:16am |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
how did
  Last edited by dorsetsmith on 21st Aug 2018 3:57pm. Edited 1 time in total |
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16th Aug 2018 11:19am |
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