Mgzt fan issues

[mgzrjake]

sadly I kept fan an wires but not box

[SD1too]

Originally Posted by Arctic

... yes the grey thin wire is connected to the same terminal as the blue/red wire ..

Steve; I notice from Jake's photos that his thin grey wire (1) isn't spliced into the blue/red wire and (2) appears to have been cut off at the exit from the control box.

Simon

[mgzrjake]

Originally Posted by mgzrjake

Simon I will await any info any time.

Simon yet again I cannot thank you enough .

I will try this tomorrow and report back as now clean and tidy to go out and the missis will kill me.

Shall I replace blue/red wire before trying this next stage ?

Jt

[Arctic]

HI Simon.
I have just seen that now you mention it, but as I said I have sometimes seen the grey thin wire connected to the blue/red wire inside the conduit.


[QUOTE]

Originally Posted by mgzrjake

Shall I replace blue/red wire before trying this next stage ?

Jake strip back the conduit and see if the grey wire is joined to the blue/red thin wire anywhere along its length lets us know please Arctic

[mgzrjake]

[QUOTE=Arctic;2645760]HI Simon.
I have just seen that now you mention it, but as I said I have sometimes seen the grey thin wire connected to the blue/red wire inside the conduit.

Jake strip back the conduit and see if the grey wire is joined to the blue/red thin wire anywhere along its length lets us know please Arctic

I will do this later thanks guys I’ll report findings

[SD1too]

Originally Posted by mgzrjake

Shall I replace blue/red wire before trying this next stage ?

Yes, the blue/red connector should now be reattached to its terminal on the PCB (it carries the fan control signal from the car’s main ECU).

Simon

[Arctic]

Hi Simon.
Found this photo amongst the large amount I have I really must get round to organising them, as you can see this one too as the grey wire cut at the entrance of the control box, I am fairly that these type of control boxes have the grey wire connected to the red/blue wire inside the conduit.

Who knows why Siemens decided to do this, I presume it was them, on request of Rover, maybe to use up the ones which populated all the terminals ?
1

[SD1too]

Originally Posted by Arctic

I am fairly that these type of control boxes have the grey wire connected to the red/blue wire inside the conduit ...
Who knows why Siemens decided to do this ...

Hi Steve,

Thanks to the photos which you sent to me ages ago of the components side of the PCBs I noticed that the 3 speed circuit was modified to 2 speed by removing components and connecting the grey wire to blue/red.
FrenchMike deduced how it worked. The grey wire was moved to enable the fast speed to run when demanded by the air conditioning trinary switch (normally it would trigger the medium speed which, of course, doesn't exist on a 2 speed fan motor). Engine cooling isn't affected.

Simon

[Arctic]

[QUOTE=SD1too;2645852]Hi Steve,

Thanks to the photos which you sent to me ages ago of the components side of the PCBs I noticed that the 3 speed circuit was modified to 2 speed by removing components and connecting the grey wire to blue/red.

FrenchMike deduced how it worked. The grey wire was moved to enable the fast speed to run when demanded by the air conditioning trinary switch (normally it would trigger the medium speed which, of course, doesn't exist on a 2 speed fan motor). Engine cooling isn't affected.

Hi Simon.
yes I have four to send to him later this week or early next week, I also have some that he as already modified from 3 speed to 2 speed, the ones I am going to send I am going to keep as 3 speed.

1

2

Modified already by Mike
3

4

[mgzrjake]

Firstly thank you. Sorry not been back on only just got home after a horrible day at work. Not checked wires or done 2nd test to see if fan spins but will do it in the morning and report back.

Jt