C7 DFH Posted May 3, 2012 Share Posted May 3, 2012 My speedometer has stopped working ☹️ with an MOT due. The needle doesn't move and the digital mileage is not displayed. The dial still illuminates. The engine is a K series with a 6 speed. Any ideas? Thanks Dominic Link to comment Share on other sites More sharing options...
Pezky Posted May 3, 2012 Share Posted May 3, 2012 not sure they actually check it Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted May 3, 2012 Area Representative Share Posted May 3, 2012 Quoting Q102: not sure they actually check it They don't check the function, but they do require the odometer reading for the MOT. Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted May 3, 2012 Share Posted May 3, 2012 Anyone local with similar model that you could borrow for a day ? Similar mileage of course ! Link to comment Share on other sites More sharing options...
charlie_pank Posted May 3, 2012 Share Posted May 3, 2012 I don't think the mileage has to come from the odo for the MOT. Just tell them what it is when you hand the car over and tell them the speedo packed up on the way there. You don't fail for not having a working one. Link to comment Share on other sites More sharing options...
Bricol Posted May 3, 2012 Share Posted May 3, 2012 New regs I believe state it has to work - which is a little worrying as one of mine doesn't. However, I think due to teething problems, there is a little lee-way in the applications of the new regs. Bri Link to comment Share on other sites More sharing options...
stevethemook Posted May 3, 2012 Share Posted May 3, 2012 Mine packed up due to a broken quill off the gearbox but it was displaying the mileage..Sounds like a duff speedo to me. Check all cables around the back but sound NBG to me Got mine re calibrated and set up to run of the front wheel sensor by Speedy Cables. Once you get through the MOT as Bricol says have a chat with them . They are v slow (6 weeks to do mine) but worth it. Steve Link to comment Share on other sites More sharing options...
C7 DFH Posted May 3, 2012 Author Share Posted May 3, 2012 Thanks for the replies, but any ideas what has broken Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted May 3, 2012 Share Posted May 3, 2012 The speedo 😬 Link to comment Share on other sites More sharing options...
C7 DFH Posted May 3, 2012 Author Share Posted May 3, 2012 Any other ideas? Link to comment Share on other sites More sharing options...
seventh-heaven Posted May 3, 2012 Share Posted May 3, 2012 Most electronic gauges have a +12v feed to the gauge that is seperate to any feed to the lights - so if the lights are working but nothing else is I would first check the +12v feed to the gauge. Is it still attached and is there 12v? Link to comment Share on other sites More sharing options...
Phil B Posted May 4, 2012 Share Posted May 4, 2012 Have you tried looking on the Greengauges and Caerbont Instruments websites? They have FAQ pages which describe installation and wiring for their electronic speedos. They usually need 2 live feeds, one for the gauge and another via the lights for the instrument illumination. Due to the very low current needed for the electronics and the speed sensor, they often have a dedicated 1amp in-line fuse, this may be the source of your problem. God luck, Phil Link to comment Share on other sites More sharing options...
rjnewman Posted May 4, 2012 Share Posted May 4, 2012 I bet your speedo drive has come adfrit from the gearbox. They seem to come apart if the retaining circlip pings out or the elbow to top hat nut has worked loose. Hopefully your quill is still in place and its a matter of cleaning up and refitting. Thers lots on here if you seach for top hat about the best way to refit. If you jack up the rears and put it in gear (chock the fronts!) you can turn the rear wheels and work out where the drive is being lost. ie does quill turn, dose cable at back of speedo turn etc etc All good fun! Richard Link to comment Share on other sites More sharing options...
garybee Posted May 4, 2012 Share Posted May 4, 2012 Power for illumination of the gauge will be separate from the main power for the gauge, has to be that way so the gauge will come on with your lights. Check your main power feed to the gauge to make you have 12V+ (with the ignition on of course) to rule out a faulty supply before you go looking at the speedo' itself. Link to comment Share on other sites More sharing options...
C7 DFH Posted May 4, 2012 Author Share Posted May 4, 2012 Problem found and sorted by Track V Road in Clitheroe (thanks Ian 😶🌫️) The speedo had lost its main power feed. Apparently someone 😔 😬 had cut off the connector block to the redunant caterham oil pressure gauge (replaced with mechanical) and hadn't realised that the power feed to the speedo is daisy chained from oil pressure gauge. Dominic Link to comment Share on other sites More sharing options...
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