mcerbm Posted February 6, 2016 Share Posted February 6, 2016 I have been a bit of tidying up under the dash with the loom, I chopped the input for the Aces control unit to remove excess wiring and integrate it better under the dash. The connector the input goes into has the power, earth and the input as the 3 pins. When I cut the input wire it had silver wire sheath then a plastic layer then a copper wire.I take it the copper central wire is the carrier wire for the input and the silver wiring is just some form of shieding? If I solder or use a butt connector I would get the central copper wire connected, is there any issues if there isn't continuity in the silver sheath wire? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 6, 2016 Member Share Posted February 6, 2016 Is it the same as the type described here? That seems to say that you only need to connect "the black shielded wire".Jonathan Link to comment Share on other sites More sharing options...
CharlesElliott Posted February 7, 2016 Share Posted February 7, 2016 The shielded wire is the RPM signal. It's shielded because it is a high frequency signal - having said that, what you describe should work fine. Link to comment Share on other sites More sharing options...
Dorset7 Posted February 7, 2016 Share Posted February 7, 2016 As Charles says - the shielded wire feeds off the tacho input wire. You'll need to connect the live and ground as well, obviously. When I did mine on my old K-Series I also fitted the Caterham supplied resistor loom, as I understand it this allows for constant voltage to the tacho despite the extra feed take off (happy to be corrected though). Link to comment Share on other sites More sharing options...
Dorset7 Posted February 7, 2016 Share Posted February 7, 2016 http://www.lotus7.club/forum/techtalk/aces-sure-shift-2-wiringThis diagram is from Caterham and details the resistor loom. Link to comment Share on other sites More sharing options...
CharlesElliott Posted February 7, 2016 Share Posted February 7, 2016 Some of the ACES are modified already for EU3. If it was working before, then you should be OK. Link to comment Share on other sites More sharing options...
mcerbm Posted February 7, 2016 Author Share Posted February 7, 2016 its an EU2 caterham and as far as I can tell the input wire connects onto the crank sensor but its tricky to see. its certainly not from the tacho or ECU. It has worked fine for 2 years it wasn't until I cut the cable i thought I may have made a mistake. I'll connect the inner most copper cable and see how it goes.Slight change of topic, but related. I have a DL1 which I was wanting to get a rpm input to. I believe I cant tap into the ACES unit feed because the DL1 doesn't take an inductive pickup (I think this is what is fitted to my EU2 k-series VHPD?) So I guess a feed from the tacho input would be the best idea. The tacho pins are on the wiring diagram with their colours but it doesn't tell you their functions, which wire should I pick up on for the reb in put to the DL1? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted February 7, 2016 Member Share Posted February 7, 2016 The tacho pins are on the wiring diagram with their colours but it doesn't tell you their functions, which wire should I pick up on for the reb in put to the DL1?Which wiring diagram? And what are the colours?Jonathan Link to comment Share on other sites More sharing options...
mcerbm Posted February 7, 2016 Author Share Posted February 7, 2016 Its the wiring diagram from the build manual for my era of cars. see link here/sites/default/files/images/users/1260/EU2%20K-Series%20Wiring%20Loom.pdf Link to comment Share on other sites More sharing options...
Dorset7 Posted February 7, 2016 Share Posted February 7, 2016 According to CC the resistor in the loom is a different issue and has different purpose to that in the Sure Shift box itself - I don't profess to know all about it so I'm just going on what I was advised to do. Link to comment Share on other sites More sharing options...
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