Hello and good evening.
I have already carried out this test.
I used a side repeater bulb(I thought this a sufficient load to test with) and plugged it into the two pin plug
that connects to the heater control valve and turned the plug through the three positions.
The bulb did not light in any.
I then assumed that the original heater control panel and the replacement(Second hand) I had bought where both broken.
If it did light I would expect the heater control valve I had purchased new was broken.
Violet/Black and ignition off 0v
Violet Black and ignition on 12v
I have put a nick in each of the two heater control valve cables.
I turned the ignition to pre-ignition.
I then tested the voltages.
In the green and black cable the voltages.
Cold setting - 12v
Mid setting - Pulsed between 9.5v to 12v
Hot setting - 12v?
Does this mean that the heater control panel is broken.
The previous readings where:-
With the two wire plug ( Violet/Black and Green/black wires) connected to the heater control valve.
The previous readings where to earth point on the car to the green/black wire
New readings below where taken across the two wires and with the plug connected to the heater control valve.
Across the two wires
Cold setting - 0v
Mid setting - 0.56v Fluctuating
Hot - 0V