Climate Control Problems With Manual A/c

[eddy72]

Hi,

 

i have a strange combined problem. I have a ford galaxy tdi from september 2003. Whilst i was driving suddenly the backlight of the entire section where one controls temperature airflow and the ventilator speed went out. It kept on flickering for a while untill it totally went dead. Next to that i discovered that the only button on the panel that was still working is the ventilator speed control. The airflow and temperature control buttons stopped working, also the a/c button, the button for the ventilator in the back and the recirculation button stopped working.

 

I took the whole unit out, checked whether it received power which it does, but now i'm lost. I'm looking in the Ford Technical Information System, but i don't find this combined problem to occur. I already got myself a replacement unit (part nr YM2119980BE) but the problem persists.

 

So in short at once the fresh air/recirculation flap, the temperature flap, the a/c switch and the backlight of the unit became inoperable..

 

Hope someone has a clue where to look.

[big_kev]

Could be a bad earth.

 

Might be worth checking fuses.....can't remember exact ones for your model.

Try F18 to F23.....or somewhere around there.

 

Can you confrim that part number.....seems a bit weird ?

[eddy72]

Could be a bad earth.

 

Might be worth checking fuses.....can't remember exact ones for your model.

Try F18 to F23.....or somewhere around there.

 

Can you confrim that part number.....seems a bit weird ?

Thanks big_kev, i can confirm that the part number is right, it's the manual control unit, tried to attach the pictures of it, don't know whether i succeeded or not. This is the ford part nr. there is also a Vw part number on it as well.

I did check the fuses but they're all ok.

[big_kev]

You probably won't be able to attach pictures yet until you have posted more.

 

What was the VW part number ?

[eddy72]

You probably won't be able to attach pictures yet until you have posted more.

 

What was the VW part number ?

 

I found the problem (and solved it). The back of the ventilation control unit has three connectors: one in the middle for the ventilator switch, one that goes to the rear ventilator (the ventilation control unit in the dashboard has an internal relais for that), and a multiconnector with 36 connections. This connector provides connections to the light switch for the backlight of the panel, connections to the actuators for the temparature flap, the flaps that control the airflow, the aircon, and the recirculation flap. I found the pin layout in the Ford Information System of the connector (N270). Pin 10 and 26 are directly behind fuse 3 and should have 12V on them and 32 is behind fuse 32 and should also have 12V on it. In the end pin 26 was out of any voltage, i.e. a broken electrical wire between the fuse and this pin. I shortcutted pin 26 and 10 on the print with a little wire in the ventilation unit and now it is working again.

Really thin wires are being used for this connector.. quite error prone with regards to the chance that they break over time.