Heated seat loom wiring guide question

[Portent 0]

I am toying with the idea of retro fitting heated seat pads to my cloth seats. I have got hold of an OEM loom and switch and was testing it out of the car. I want to make sure it works before either going to the trouble of installing it or buying the heated pads.

 

So to test it I have connected what I believe are the live and switched live to a 12v source (black wire and grey/blue wire). The brown is to negative. I then turned it on at the switch and tested the pins in the seat connector with a multimeter.

 

I understand that without the thermistor (which is on the heated pad) I will only get on or off and that the 1 to 5 settings won't change the voltage. So my expected test results were just to SE a voltage of any kind on one of the pins.

 

What I got was a little surprising and I wondered if it was correct or something isn't working quite right...

 

On the seat plug end of the loom the voltage between pins 1 (brown) and 5 (blue/yellow) shows 12v when the switch is turned on (0v when off). But voltage between pins 1 (brown) and 4 (black/red) always remains at 0v. I had thought that black/red would denote live and so had expected it to be 12v.

 

Have I misunderstood or is something wrong with my test? It's great that I can get a voltage on one of the wires but I'm just a little surprised that it wasn't the black/red one. The relays did click when I received voltage.

 

Thanks.

Edited April 15, 2012 by Portent

[sankysvr6 0]

Hi there,

 

I don't have a Corrado, but i have Mk3 Golf VR6, so not sure if this will be exactly the same but the principal should be.

 

This is for a MK3 Golf,

 

On the connector that goes to the actual seat, there are 4 contacts, 1 to 4.

 

4 - GND

3 - SW+ via ignition

 

1 and 2 - is like a variable resistor, so if you put your meter on Ohms and put you meter probes across pins 1 and 2. You should see the resistance change when you move the heated seat dial from 1 to 5

 

Hope that makes sense

[Portent 0]

Thanks. Will check that.

[sankysvr6 0]

I'm in the process of repairing mine at the moment, so I've made a simpler diagram. To understand what all the wires do, i can email it to you if you think it might help you.

[Portent 0]

Thanks that would be great. I'll drop you my email although it might be better to post it in here too so it's useful for others in the future.

[sankysvr6 0]

I would post it it on here, but in not sure how to as i did it on power point. Please feel free to post it here when i send you it.

[sankysvr6 0]

Sent it to you via email, i tried PM you but not sure if it worked due to my low post count.

 

But i have been lurking this place for around 7 years

[Portent 0]

Thanks. Haven't received an email. But did get a pm (no attachement). Could you re-send to my email. Thanks.

[sankysvr6 0]

Not sure why that would be, let me know if you haven't still received it by tonight and i will try and send it from home.

[Portent 0]

Will do thanks.

[sankysvr6 0]

You missed the 'g' from your email address, it should be with you now

[Portent 0]

Thanks for doing this. Got it now. I've screen printed it and uploaded the diagram here:

 

[ATTACH=CONFIG]60429[/ATTACH]

 

[ATTACH=CONFIG]60433[/ATTACH]

[ATTACH=CONFIG]60437[/ATTACH]