| Author | Message | ||
     John Rowney Experienced User Username: johnrowney Post Number: 160 Registered: 02-2015 |
The external temperature gauge on my 1978 Corniche DRH32489 has been playing up. It works occasionally, but mostly it indicates about -30 deg C (the lowest it can read). In a moment of madness, I have taken off the radiator shell and looked at what I have got installed as the sensor.  The sensor and the associated gizmo enscribed 7K1.  Another view The Sensor is a VDO device with the number 977. I have looked at the Introcar and Flying Spares sites and there appears to be nothing resembling the system I have found. Does anyone have any idea of what I should do? Does anyone know what the gizmo labelled 7K1 actually is? By the way: Now that I have pulled the radiator shell assembly off, the external temperature is reading perfectly!! Looks like I will have to reassemble everything before I get the dodgy temperatures again. | ||
| Alan Dibley Frequent User Username: alsdibley Post Number: 390 Registered: 10-2009 |
John, the temperature reads very low because there is a break in the two-wire circuit from meter to sensor and back. Twiddling the wiring while watching the result at the meter should find it - most probably at a connector. The environment around there is hostile to electrical connections. HTH, Alan D. | ||
| John Rowney Experienced User Username: johnrowney Post Number: 161 Registered: 02-2015 |
Thanks, Alan I fiddled around with the connections and taped over the damaged covers, and the temperature reading remained exact. I also noticed that the gizmo labelled 7K1 had a hole in it corresponding to the hole in the bracket which holds the sensor. So I bolted it on and the wiring looked like it was originally in place there. I put the radiator shell back on and went for a spin for an hour or so - the temperature was perfect! Many thanks for the suggestion. It would be interesting to find out what the 7K1 gizmo is. Perhaps it is part of a wheatstone bridge type of measuring system. |
