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Old 01-22-2003, 02:14 AM   #1
parid
Scooby Newbie
 
Member#: 16336
Join Date: Mar 2002
Chapter/Region: NWIC
Location: Eugene, OR
Vehicle:
2002 WRX Wagon
Black

Default Wiring for Recaro Sports

I tried to help a friend of mine wire in his new Recaro Sports in his WRX wagon today. They fit great and look good too.

We only hand one pretty big problem. He ordered the heated/power seats and they require a power lead to make them work. From what we have gathered, it is 12v. There are two ground wires, and one power wire. Seats came from the vendor made for the wrx but they completely failed to provide /any/ directions on how to wire it up. The information we got from them was ridiculous and made no sense.

I'm gathering that the heaters in the seats (he got the front set) could possibly draw a lot of power. The best way would probably be to run a completely new line to the battery. The only problem with that is that now the seats can sit (especially with the heater on) and drain the battery when the car isn't in use. I don't have a good enough multimeter to measure the draw from the seats just straight to the battery. I'm not really sure exactly how much power they use.

I can see two possible solutions:

A. We find some existing circuit in the car that can handle the load and that is only on when the car is on.

or

B. We run a new lead to the battery. In the middle of the line, we put a switch in. The switch would then somehow, know if the car was on or not. It doesn’t sound like it would be too hard to rig up but I have never worked on anything like that.

Does anyone have these seats (or any other power seats, they would probably have the same problem too)? I was looking around the wiring diagram for the car and I noticed that the relay for J-spec heated seat option was in it. Would it be possible to tap into that somewhere?

Help!

Thanks!
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Old 01-22-2003, 03:32 AM   #2
teiva-boy
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Member#: 22825
Join Date: Aug 2002
Chapter/Region: NWIC
Location: Seattle, WA
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The good ole US of A didn't get the heated seat option but Canada did. You could get an OE looking switch from a suby dealer there. Or perhaps get some from www.leatherseats.com as they sell heated seat inserts with their leather kits as an option and the switches look really good.

You would of course wire in a switch to the seats. No point in wiring it to a 12V line without being able to turn it on or off.


Ideally you want to follow choice A. But there are a few caveats to this.

1. You want to use a relay. A normal switch or the OE switch if you go that far into making it look stock is not strong enough to power something that could possibly draw some 10amps per seat. So you would wire in a relay that gets a constant 12V input. Then wire in a switch to turn the relay on or off. This way the relay will handle all the work of the high current load being switched on or off.

2. Assuming that it is a 10 amp circuit, and it's going to be for two seats... You need two switches and two relays. A SPST relay will do x2. Or a DPDT relay I think... I would have to look at the schematics for relays again, it's been a while

3. As for a circuit to tap into... I'm not sure. If there is no booming stereo in there you could tap the radio line. Personally I would run a 10ga cable from the relay to the battery or the relay to the back of the fuse block. There is a 12V+ constant there you just have to find it. You dont wantto take it off a fuse, but rather from the bulk line that comes into the dash from the engine bay

4. Now you want to wire the switch to the relay in a way that it gets only a switched 12V signal. So in this case, you have to look for a 12V wire that only goes hot when the car is in a ON state. This lets you only heat the seats with the car on.


I hope this gets you somewhat started. It's really not hard to do or understand if youthink about it. But it's going to take a couple hours to do and do right. Electrical work is never fun on automobiles.
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Old 01-22-2003, 02:04 PM   #3
Alan
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Member#: 3601
Join Date: Jan 2001
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Location: Tigard, Oregon
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2006 WRX Wagon
BRIGHT BLUE!

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Actually the US cars do have most of the wiring available for the seat heaters. You need to insert a relay into the relay box near the clutch pedal at location B104 which is the 3rd relay location from the top. Having done that, you'll now have fused, relay controlled power at the harness next to the passenger seat, connector B97 which is right at the bottom of the B pillar - a Blue wire. From there you just hook to switches in the center console, and to the seats - and from the seats to ground.

You really ought to get the wiring book, it's only $15 or so, it makes it really easy to find out this stuff.

Or you can download it.
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Old 01-22-2003, 02:09 PM   #4
parid
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Member#: 16336
Join Date: Mar 2002
Chapter/Region: NWIC
Location: Eugene, OR
Vehicle:
2002 WRX Wagon
Black

Default

Actually the buttons for the seat heaters and fans (it has ventilation :P) are on the seat its self. We don't need to wire any other buttons on them, just needs straight 12v power that turns off with the car.

I think I'm catching on. I know where the relay box is near the clutch petal. What relay should I use? Is there a part number I can just go pick up from the local parts counter? Then we should be getting 12v through to the blue wire in the B-pillar right?

Last edited by parid; 01-22-2003 at 02:18 PM.
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Old 01-22-2003, 02:47 PM   #5
Alan
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Member#: 3601
Join Date: Jan 2001
Chapter/Region: NWIC
Location: Tigard, Oregon
Vehicle:
2006 WRX Wagon
BRIGHT BLUE!

Default

The relays are all the same in that box, So the one that works the fogs or such is what you need. I was lucky to find one used at a junkyard for a buck, I think Subaru gets about $30 for them.

And then you WILL have fused relay controlled power at the Blue wire. I'm using it in my WRX to power the subwoofer amp under the seat.
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