Se7enBTCC Posted September 21, 2019 Share Posted September 21, 2019 Evening, Can anyone please help, the speedo has stopped working, there is power to the digital odometer still but it’s stopped increasing mileage.It’s a 2019 420r, Duratek.thanks Link to comment Share on other sites More sharing options...
John Vine Posted September 22, 2019 Share Posted September 22, 2019 First of all, check the sender (adjacent to the outer end of the RH driveshaft). If the wiring is intact, it may be that the air gap is too small or too large. Have a look at this technical guide (Speedometers).JV Link to comment Share on other sites More sharing options...
BigCol Posted September 22, 2019 Share Posted September 22, 2019 Given the age of your car, would hope it isn’t a faulty sensor, the earth mod that was recommended for old cars but the sensor gap, which is notorious... but easy to fix (lots of articles on here) Link to comment Share on other sites More sharing options...
Se7enBTCC Posted September 23, 2019 Author Share Posted September 23, 2019 Thanks for the advice, I'll focus on the sensor Link to comment Share on other sites More sharing options...
Garth Posted September 24, 2019 Share Posted September 24, 2019 Presume it is still under warranty? Link to comment Share on other sites More sharing options...
Se7enBTCC Posted September 24, 2019 Author Share Posted September 24, 2019 Yes, that is my fallback, just a pain to get it to Caterham Silverstone, had a few teething issues. Link to comment Share on other sites More sharing options...
BigCol Posted September 29, 2019 Share Posted September 29, 2019 Any news...? Sorted...? Link to comment Share on other sites More sharing options...
Se7enBTCC Posted September 30, 2019 Author Share Posted September 30, 2019 Had the wheel off and with ignition on couldn’t see any light coming from sensor, changed the air gap and still no joy. Any idea where the fuse is for it? Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted September 30, 2019 Member Share Posted September 30, 2019 Any idea where the fuse is for it?2019 420r, Duratek.If you'd like a wiring diagram please send me a Private Message with your email address and details of the Seven.there is power to the digital odometer still but it’s stopped increasing mileage.All other instruments and electrics working?Jonathan Link to comment Share on other sites More sharing options...
Member Jonathan Kay Posted September 30, 2019 Member Share Posted September 30, 2019 Fuse layout is probably:Jonathan Link to comment Share on other sites More sharing options...
Se7enBTCC Posted September 30, 2019 Author Share Posted September 30, 2019 Thanks sent the PM,all other electrics are working.... Link to comment Share on other sites More sharing options...
John Vine Posted September 30, 2019 Share Posted September 30, 2019 Have you tested for a 12v supply at the sensor (green wire in the loom connector)?...couldn’t see any light coming from sensor,...If you have the new-style sensor with the plastic mount, the LED may not be immediately visible as it can be somewhat hidden by the mount. You could try loosening the lock nut and rotating the mount a little.JV Link to comment Share on other sites More sharing options...
Se7enBTCC Posted September 30, 2019 Author Share Posted September 30, 2019 Thanks for that, I'll check the supply.I'd read about the new style sensor but I don't think it is, I'll take a photo and share it. I have pulled it out to about 3mm to try and see the light but no joy. Link to comment Share on other sites More sharing options...
John Vine Posted September 30, 2019 Share Posted September 30, 2019 If it's the old-style sensor, you should be able to see the LED no matter what gap you have. The bit that lights up is at the end where the cable enters. JV Link to comment Share on other sites More sharing options...
ChrisC Posted October 1, 2019 Share Posted October 1, 2019 The new smaller sensor does light up, but its not easy to see, its more of a glow around the wire going into the sensor. The new sensor has to be much closer to the trigger when than the old sensor. Link to comment Share on other sites More sharing options...
Se7enBTCC Posted October 26, 2019 Author Share Posted October 26, 2019 Just to close this thread off. It was the sensor, it had been rubbing against the cog and had damaged it. Warranty claim with Caterham and they sent a new sensor which worked straight off. Problem solved. Link to comment Share on other sites More sharing options...
John Vine Posted October 27, 2019 Share Posted October 27, 2019 Thanks for reporting back. Glad it's fixed. JV Link to comment Share on other sites More sharing options...
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