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Old 2nd September 2021, 11:02   #3
bluemalbert
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MG ZT 190

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[QUOTE=SD1too;2898180]Yes. Set the centre rotary control fully clockwise to the windscreen demist position. Does the LED in the 'A/C' button illuminate? If not, press the 'A/C' button so that it does.

Hi Simon - the a/c button will only illuminate with the engine running ie not ignition only. When it does .............................see below:

Great care is needed identifying the wiring colours. There is slate/yellow and yellow/slate! The first colour is the main one and the second is the tracer. Confirm your identification by looking for the tiny terminal numbers moulded into the plastic connectors:

1 = slate/yellow
2 = black
3 = yellow/slate
4 = black

To check the faster fan speed you need to bridge terminals 2 & 3.
Do you have a 2 or 3 speed fan Mal?

Sorry for the careless colour ID. Yes I agree with the colours and see the numbers too and can confirm Ive been bridging 2 and 3 with out action! (engine running )
I have no resistor gold or silver that I can see so can only assume its an earlier 3 speed.
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