Geoff Wilcx Posted February 23, 2009 Share Posted February 23, 2009 Is the water temperaure gauge on a K driven by the sensor on the water rail (pipe). I'm assuming that its the sensor with 1 connection and the other sensor ( 2 wires) next to it feeds back to the ECU. Does the sensor for the gauge earth through the engine - reason for wanting to know it that be gauge reads 0 when switched to water temperature yet when swithced to oil temperature then I get a reading. just dosen't feel good driving a car with zero showing on the water temp gauge. Link to comment Share on other sites More sharing options...
Frying Pan Posted February 23, 2009 Share Posted February 23, 2009 Yes - it's the single wire sensor, and earths through the water rail. To test whether it's the wiring or the sensor, remove the connector form the sensor and touch to the engine or any other earthed point - the gauge should read max (you need ignition on). If it does, the sensor is screwed (They are pretty unreliable, but also pretty cheap and easy to replace). If not, you have a continuity fault between the sensor, changeover switch and gauge Guy -----See some pictures of the build here. 15000 miles completed! Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted February 23, 2009 Share Posted February 23, 2009 It is the sender with the single wire attached to it. With the ignition on, unplug the cable and ground it on to an earthed piece of engine. The gauge should read full scale. This proves the wiring and the gauge. Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted February 23, 2009 Share Posted February 23, 2009 Snap !! Link to comment Share on other sites More sharing options...
Area Representative Paul Richards Posted February 23, 2009 Area Representative Share Posted February 23, 2009 Yes - Water temperature gauge sensor is on water rail with a single wire - it is same as the temperature sensor sticking out of the apollo tank. Start by removing wire and putting to a good earth. Make sure ignition is on and switch for gauge is over to water. Temperature gauge should deflect straight across to max temp. If it does, it is the sensor or it's earth that is the problem. If not you are looking for a problem in the wiring to the gauge. Good luck. Edited to say I must type quicker. Paul Richards Area Representative - L.A.D.S. (Lancashire and District Sevens) LADS Website Growing old is compulsory - Growing up is optional Edited by - Paul Richards on 23 Feb 2009 21:38:13 Link to comment Share on other sites More sharing options...
Frying Pan Posted February 23, 2009 Share Posted February 23, 2009 At least we all agree See some pictures of the build here. 15000 miles completed! Link to comment Share on other sites More sharing options...
Geoff Wilcx Posted February 23, 2009 Author Share Posted February 23, 2009 Thanks guys - as suspected its the sensor at fault - just ordered one from the online store - wonder how long it will take to arrive? *confused* Link to comment Share on other sites More sharing options...
Stationary M25 Traveller Posted February 23, 2009 Share Posted February 23, 2009 And don't use loads of PTFE tape to seal it, or you won't get the metal - metal contact needed to make the circuit !!! (Is this the problem ?). Link to comment Share on other sites More sharing options...
Geoff Wilcx Posted February 24, 2009 Author Share Posted February 24, 2009 Sure its not PTFE causing the problem either as I have just tested for continuity from the body of the senser to chassis earth and all is okay...that in addition to earthing the wire to the gauge and gettng Full Scale reading all points to a duff senser....have one on the way so hopefully that will cure. www.geoffwilcoxphotography.co.uk Link to comment Share on other sites More sharing options...
LazerBrain Posted February 24, 2009 Share Posted February 24, 2009 Mine took about a day to arrive, ordered a couple of weeks ago. cheers, Darren. Link to comment Share on other sites More sharing options...
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