Adding heated and lumber support seats?

O

Olerype

Member
Going from: standard non heated non lumber seats

Going to: full leather sportseats with heating and electrical lumber

Are there any treads in here to make this swop?

Guess the mechanical part is just a bolton job, but guess I need to take the electrical loom (and AC unit) from the donor car? Is the power taken from the AC unit or a dedicated fuse?
 
@timmus will be the one to confirm, but apart from harvesting the red and green connectors from the ends of the looms at the seats, and the big green connectors from behind the climate unit, it would be easier to leave the wiring in the donor car and build new looms for the recipient. I understand it's to do with the routing of the heated seat circuit which would involve removing the dashboard to get it all out.

The lumbar circuit may be better routed, but it's so simple that you can easily power the lumbar (on a temporary basis) to get your desired setting. Wire one of the red connectors to a 12v plug - just two wires for 12v and earth - and connect it from the 12v socket to each of your seats in turn to power the motor while you adjust the lumbar with the switch.
 
Since you mention connectors, does this mean that the powersupply to the heating comes from the AC unit (dial)?

Will never use the lumbAr, but just built like «if it is there, it should work». But then I just need to pull power from somewhere? Maybe I just pull power directly from battery since that is very easy.
 
I'd be very surprised if the heated seat circuit didn't have its own fused power supply, as far as I know it's just the switches that are clipped into the back of the climate unit. Several people have done their own lumbar circuits though, I'm sure someone will be able to tell you how they configured it.
 
Tom did my lumbar wiring, took all of 10 mins
He picked up power in the passenger side (RH Drive car) A pillar, added a fuse and ran the loom along the sill and under the carpet at the back of the hump where the front seat mounts bolt to, one loom exits the carpet for the (RH drive) passenger seat, the remainder of the loom goes under the centre console and comes through the carpet in the middle of the drivers side seat.
the power draw is not very much and only fora few seconds whilst the lumber is adjusted

The heated seats draw a lot more power, I'm sure there is a dedicated fuse in the fuse box for them
I wired my home brew electric seats from the large power feed under the (RH drive) passengers secret compartment and used a 15 amp fuse. mine draw 4.5 amps per seat on number 5
 
It's a completely different A/C unit with two extra rotory controls for seat heating. A dedicated wiring harness, too. It's pretty important to purchase those components at the same time as the seats. Also, there is a difference between an A2 with a single or double-DIN dash. The lumbar side of things is simpler .... you just need a simple extra harness for each side. It is so simple that you might as well have it fully operational. Again, it's always worth getting them when purchasing the seats ......

David
 
Relax; I bought the whole car just to get to the seats hehe.

So I got everything from the donor that physically match my car. It is just the wiring loom that concerns me; as I also think I will not being able to pull the wiring loom from the donor. Just curios about the wiring from the rotary dials and the power to the heating element. Is it just in series or is there a aux relay somewhere?

Have a subwoofer under the seat already with fused power directly from battery. That very easy.
 
damadgeruk said:
This may be of interest...
www.cum-cartec-shop.de

Kabelsatz für Sitzheizung

Mit diesem Anschlusskabel können Sie eine nachgerüstete Sitzheizungsmatte anschließen. Das Anschlusskabel muss mit den originalen Sitzheizungsreglern im Armaturenbrett und der Zentralelektrik verbunden werden. Passend für folgende ...
www.cum-cartec-shop.de www.cum-cartec-shop.de
Click to expand...

Ahh; will check this one. Need to purchase cruise control there anyway!
 
Olerype said:
Relax; I bought the whole car just to get to the seats hehe.

So I got everything from the donor that physically match my car. It is just the wiring loom that concerns me; as I also think I will not being able to pull the wiring loom from the donor. Just curios about the wiring from the rotary dials and the power to the heating element. Is it just in series or is there a aux relay somewhere?

Have a subwoofer under the seat already with fused power directly from battery. That very easy.
Click to expand...
No relays involved with the seat heating.
 
Olerype said:
. It is just the wiring loom that concerns me; as I also think I will not being able to pull the wiring loom from the donor. Just curios about the wiring from the rotary dials and the power to the heating element.
Click to expand...
You shouldn't find it too difficult. The technique is to methodically follow it from the seats, forward to the dash and controllers. Take photos of routing and connections to the associated components. Just take your time and all will be well. I have added heating and lumbar to seats on two occasions ... That is much more hassle than simply changing the seats! AND I have even made a composite A/C unit from double and single DIN units, just to get the shiny buttons and front-finish!

David
 
Kleynie said:
This is the heated seat loom we used, worked a treat. We also have the cruise loom from the same company.
Click to expand...

Do you remember the connections; do you just clip one connector to the rear of the AC unit, and the other connector at the seat? Or need to do some cable splicing somewhere? Where was power taken from?
 
There is a connector to the rear of each of the roller heated seat switches. Apart from these switches being housed on the the sides of the climate front panel the heated seat wiring is independent of the climate system. I am sure Kleynie will reply in due course.

I will send you a PM with a link for an A4 wiring diagram which is similiar I believe to the A2 to give you the logical layout, it is quite easy to understand and will give you the idea.

Andy
 
Olerype said:
Do you remember the connections; do you just clip one connector to the rear of the AC unit, and the other connector at the seat? Or need to do some cable splicing somewhere? Where was power taken from?
Click to expand...
Yes, one in each seat, one in the climate control unit, and there is also a switched ignition source and a constant live source needed. There's also one for illumination, so that the switches light up with the headlights on. It sounds like a lot, but it's easy enough when you know where to get the connections from.
 
Installed with wire kit. The lumber support wiring I made my self.

52688


52689
 
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