Coolant temp sensor
Discussion
My coolant gauge has stopped working 
Where would I find the sender unit for it? The fan cuts in and out fine, although did it at 70-80degrees on the gauge (when it was working) which suggested a semi-packed up sender unit. This has now progressed into a fully packed-up sender unit! I'm hoping to clean the contacts and plug or replace the unit to cure the problem. Just hoping its not the gauge!
Thanks
Where would I find the sender unit for it? The fan cuts in and out fine, although did it at 70-80degrees on the gauge (when it was working) which suggested a semi-packed up sender unit. This has now progressed into a fully packed-up sender unit! I'm hoping to clean the contacts and plug or replace the unit to cure the problem. Just hoping its not the gauge!
Thanks
You should find a 'spare' sender up on top of the engine, behind the distributor, next to the coolant sensor. It will have a brass screw on top for a terminal. This is the sender Land Rover use; TVR opted for fitting one on the front. Wire a 120 ohm resistor in series with it: you should be able to get one from Maplin. Rumour has it that it provides a more accurate reading.
If the gauge itself is faulty, this is a cheaper way of finding out than buying a TVR sender.
If the gauge itself is faulty, this is a cheaper way of finding out than buying a TVR sender.
Cider Andy said:
You should find a 'spare' sender up on top of the engine, behind the distributor, next to the coolant sensor. It will have a brass screw on top for a terminal. This is the sender Land Rover use; TVR opted for fitting one on the front. Wire a 120 ohm resistor in series with it: you should be able to get one from Maplin. Rumour has it that it provides a more accurate reading.
If the gauge itself is faulty, this is a cheaper way of finding out than buying a TVR sender.
I used a 200k variable resistor,nice constant readings now for the last 12 months.If the gauge itself is faulty, this is a cheaper way of finding out than buying a TVR sender.
Rich, the temp sensor is mounted at the front of the engine behind the dizzy pointing forwards and is a PITA to get to.
Disconnect the wire from the sender and hold it on the engine to earth it.
With the ignition on the gauge should read full scale. If it does, your gauge is fine but the sender is
knackered. If it doesn't you may have a blown fuse or the gauge is dead.
Hope that helps.
Paul.
Disconnect the wire from the sender and hold it on the engine to earth it.
With the ignition on the gauge should read full scale. If it does, your gauge is fine but the sender is
knackered. If it doesn't you may have a blown fuse or the gauge is dead.
Hope that helps.
Paul.
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