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ibexman



Member Since: 13 Dec 2008
Location: Essex
Posts: 2945

United Kingdom 
Rotary carling switch
Could I use one of these for Td5 heater fan would it need resistors.?

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Post #708934 24th May 2018 2:28pm
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rallysteve



Member Since: 10 Feb 2014
Location: Cumbria
Posts: 2237

United Kingdom 2002 Defender 110 Td5 DCPU Keswick Green
To fully replace the heater switch in a pre-tdci defender you will need a 3 position switch (off-on-on). Resistors are not required if you are only changing the switch as they are built into the heaterbox itself. Ignoring the fact that the lever on the left of the binnacle (for rhd vehicles) controls the air inlet flap through the bulkhead, it simply switches the blower motor to earth either through the resistor or not, with the addition of an off position.

I have not looked at the configurations of the rotary versions of the carling switch but if it has an integrated illuminated indicator (telltale) light this will not work correctly as you are switching an earth path not a positive feed. It shouldn't affect any normal switch illumination if the switch has such a thing as they are usually wired completely separate on carling switches.

Steve 02' 110 TD5 Double Cab Rebuild Thread
Post #708997 24th May 2018 8:18pm
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ibexman



Member Since: 13 Dec 2008
Location: Essex
Posts: 2945

United Kingdom 
Could I use this

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Post #709010 24th May 2018 8:57pm
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