Myles Posted May 29, 2003 Share Posted May 29, 2003 Just spoken to Caterham aftersales regarding my amazing backwards revcounter (from a dodgy batch in early 2001 fitted to early EU3 k-series and Academy cars - the needle reverses at high revs). They will swap the unit for me - I've just got to get it to them (including nuts/bracket). I didn't build the car and don't have a build manual - is it an easy job to do with the dash in situ, or had I better wait until next weeks service (*not* at Caterham) - in which case I might have trouble putting it back??? I would just go and look at the bl**dy car, but it is an hours drive away... Thanks! Myles Link to comment Share on other sites More sharing options...
robmar Posted May 29, 2003 Share Posted May 29, 2003 yes it is very simple feel behind the tacho and you will find 2 round nuts that you can simply unscrew,they will be on 2 threaded bits of metal sticking out the back of the tacho then there is one connector to unplug, but this is easier if yuo just pull the tacho out first where abouts are you, I have a 'spare' you could borrow whilst caterham send you a replacement if you want rob Link to comment Share on other sites More sharing options...
Myles Posted May 29, 2003 Author Share Posted May 29, 2003 Oh good - sounds easy enough for little me! Thanks for the offer - It would be great if I could borrow a spare, but if it's too much hassle to coordinate then I'll be OK. The car lives in Cheltenham - but I am based near Stratford-upon-Avon in Warks. If that's inconvenient, then I'm sure I can live without the counter until Caterham sort it out. Regds, Myles Link to comment Share on other sites More sharing options...
robmar Posted May 29, 2003 Share Posted May 29, 2003 Well I am actually in berkshire (not really elbonia 😳), so maybe a little difficult, but not impossible drop me an email offline rob Link to comment Share on other sites More sharing options...
Myles Posted May 29, 2003 Author Share Posted May 29, 2003 Supplementary: What is the thingy that looks like an LED half a radius between the needle spindle and the top of the dial? Is this a shift light - if so, why isn't it connected already? (I have an EU3 spec engine - I believe from other postings that the ECU has pins waiting for shift lights...) Regds, Link to comment Share on other sites More sharing options...
Graham Sewell Posted May 29, 2003 Share Posted May 29, 2003 The rate you are going, you may need a spare Low tech luddite - xflow and proud! Link to comment Share on other sites More sharing options...
Chris W Posted May 29, 2003 Share Posted May 29, 2003 Myles The nuts on the back of the tacho don't need a spanner. They are knurled thingies to be undone by hand.... unless Caterham's answer to Schwartzenegger did them up! The extra LED you mention is indeed a shift light. It's only activated on the higher spec'd K series. On my 140hp 1.8K it wasn't activated but I designed some circuitry to make it work. It was already connected to the ECU, but the ECU's not programmed for it on mine, so I took a feed off the tacho input and used some electronics to run it. Chris 1.8K SV 140hp see it here Link to comment Share on other sites More sharing options...
robmar Posted May 30, 2003 Share Posted May 30, 2003 Myles - if it is a supersport - the new tacho may have a working shift light maybe rob Link to comment Share on other sites More sharing options...
dino ferrana Posted May 30, 2003 Share Posted May 30, 2003 Only works on Supersports I believe. The output from the ECU is something like the Air-COnditioning controller Link to comment Share on other sites More sharing options...
Myles Posted May 30, 2003 Author Share Posted May 30, 2003 Roadsport unfortunately. Only owned it a week and I'm suffering from powerlust already. Confused about the ecu (EU3 spec) output (on pin 59?) though - where do aftermarket shiftlights get their drive from? Would I find it similarly difficult to fit one of these instead of wiring the existing tacho light? I'm not a rev monkey (yet), but from the coupla hundred miles I've put on the car so far, I can see that some sort of light would be 'andy. Myles Link to comment Share on other sites More sharing options...
bl0498 Posted May 30, 2003 Share Posted May 30, 2003 Myles, I have an EU3 Supersport 1600 with the additional shift light loom. I replaced the tacho myself - and I live the Cheltenham side of Gloucester. If you want to pop round I will happily show you how to do all of this... Give me a call on 07767 898698 if you need help. Brian Link to comment Share on other sites More sharing options...
Chris W Posted May 30, 2003 Share Posted May 30, 2003 Myles As to where do after market shifte lights derive their input...... I mentioned this in my earlier post. You can pick up from the tacho input (black/white wire). It carries +6v square pulses at exactly twice engine speed. I don't know if all after market jobbies do this, but I did and it works great. Chris 1.8K SV 140hp see it here Link to comment Share on other sites More sharing options...
Myles Posted May 30, 2003 Author Share Posted May 30, 2003 Chris - sorry, didn't notice or absorb the bit about the drive. Bl0498 - I was going to pick the car up this afternoon (I live nr. Stratford on avon), rip out the tacho to send back to Caterham and have a bit of a blast - but I ran out of time and don't think Caterham would have got the replacement back to me by EOD Tuesday anyway. I'll probably be out for a blat tomorrow early afternoon-ish though - dunno if you're out for a drive in the area (i.e. nr. Cheltenham where the car lives) - it is a roadsport though 😳 - there seems to be some doubt as to whether the ECU drives a shift light at all Regds, Myles Link to comment Share on other sites More sharing options...
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