oneandtwo Posted December 9, 2014 Share Posted December 9, 2014 Fitted a td5 dash to my 1996 300tdi 90, everything works fine except for the low fuel warning light - it stays in all the time except when the fog light is switched on it turns off, then when the fog light is turned off again, the low fuel light comes back on. The vehicle didn't have a low fuel warning fitted so I have wired it up to the td5 speedo / fuel gauge feed Any ideas? Thanks Quote Link to comment Share on other sites More sharing options...
Mo Murphy Posted December 9, 2014 Share Posted December 9, 2014 Did you wire it to the fuel light pin on the speedo? Mo Quote Link to comment Share on other sites More sharing options...
oneandtwo Posted December 10, 2014 Author Share Posted December 10, 2014 Yes it is all wired correctly. I have just read up about the speedo damping the fuel sender signal and activating the fuel light so I replaced the speedo with the one I have purchased for my hicap- with a replacement speedo it all functions fine, put the original speedo back in and the fuel light is playing up again, so I am guessing that the original speedo has a problem with its fuel circuitry? Quote Link to comment Share on other sites More sharing options...
western Posted December 10, 2014 Share Posted December 10, 2014 reckon so, my td5 speedo doesn't operate the low fuel light, so I connected it direct to the tank sender low fuel connection as it was with the original gauges/warning light panel. Quote Link to comment Share on other sites More sharing options...
subseauk Posted December 10, 2014 Share Posted December 10, 2014 Sorry to jump in and hijack this thread but does anyone know what fuel sender i should use in a standard fuel tank when upgrading the dash to a TD5 type? I have all the connectors etc but they don't seem to match the unit currently fitted. Thanks and appologies once again. Quote Link to comment Share on other sites More sharing options...
western Posted December 10, 2014 Share Posted December 10, 2014 Can't remember if you have a 90 or 110, but for a 110 pre td5 just use the standard sender unit with 3 elect connections -- earth, low fuel light, fuel gauge, LR part number PRC8463 picture here http://www.brit-car.co.uk/product.php/89988/0/fuel_tank_sender_unit_110_ja915357_defender wire sender low fuel connection direct to low fuel light, don't bother taking it through the speedo connection. Quote Link to comment Share on other sites More sharing options...
oneandtwo Posted December 10, 2014 Author Share Posted December 10, 2014 I've got a rear plastic tank and proper 300tdi ROW sender so no low fuel light. The fuel guage still works fine, but I'll use my other speedo from my hicap for now. Quote Link to comment Share on other sites More sharing options...
subseauk Posted December 11, 2014 Share Posted December 11, 2014 Can't remember if you have a 90 or 110, but for a 110 pre td5 just use the standard sender unit with 3 elect connections -- earth, low fuel light, fuel gauge, LR part number PRC8463 picture here http://www.brit-car.co.uk/product.php/89988/0/fuel_tank_sender_unit_110_ja915357_defender wire sender low fuel connection direct to low fuel light, don't bother taking it through the speedo connection. Hi Ralph not sure if you were responding to me or oneandtwo but if it was to me i have a 90 with the centre fuel tank with i believe 3 flat blade type connections one the sender unit, i will have a look to see if these will work direct "on the bench" Appologies oneand two and good luck with yours. Cheers Kev Quote Link to comment Share on other sites More sharing options...
western Posted December 11, 2014 Share Posted December 11, 2014 Hi Ralph not sure if you were responding to me or oneandtwo but if it was to me i have a 90 with the centre fuel tank with i believe 3 flat blade type connections one the sender unit, i will have a look to see if these will work direct "on the bench" Appologies oneand two and good luck with yours. Cheers Kev My last reply was for you KEV Quote Link to comment Share on other sites More sharing options...
subseauk Posted December 11, 2014 Share Posted December 11, 2014 My last reply was for you KEV Cheers Ralph Rgds Kev Quote Link to comment Share on other sites More sharing options...
CwazyWabbit Posted July 9, 2016 Share Posted July 9, 2016 So time for a thread revival as I finally repaired the faulty speedo I sold OneAndTwo all those years ago. The faulty fuel light is caused by a blown transistor on the speedo main board. It's a BC817-25 in case anyone else has to replace it on their speedo. I've circled it on the picture. I'm not sending this speedo back to OneAndTwo as I've got him a replacement one, I'm currently awaiting the replacement transistor for this one but have proved the fault by replacing with a transistor in the wrong package type as a temporary measure. Anyway, so there you have it. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.