Borealis

New Member
I seem to have an odd problem with the temperature gauge or/and sender in my Td5 (Defender 110). When the engine is cold the gauge shows "H" and as the engine warms up the gauge sinks towards the "cold" mark. The wiring can't be mixed since they have these grooves that make the socket only fit in one way.

Any suggestions?
 
Yeah, lol.... But frankly, there is only three components here: the sender, the wiring and the gauge. All you people with some experience of LR's, where should I start my search? Which of the mentioned are most likely to break down? All tips appreciated. Thank you.
 
Unusual to have one read backwards - issues are usually earth fauly, cable broken/chaffing or failed sender

What colour is the wire attached to the sender?
 
When visiting the local dealer workshop I mentioned the temp gauge. The mechanic checked the engine with a computer and discovered that the ECU is not original, but from a Disco 2. You get two effects from this. The gauge is the most visible sign, but you also get a small improvment since the Disco ECU seems to slightly tune the engine. The drawback is that the Swedish equivalent to the MOT test can detect a emission level that is too high. A new ECU is about £1400 so that is out of the question. We are looking for a used unit. So, the mystery is solved.
 

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