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General E46 Forum
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Old 03-29-2012, 09:25 PM   #1
kkamakasi
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Is it possible to power e46 m3 front seats with wall plug?

I am working on a project and want to power a driverside e46 m3 power seats. I was wondering if there was a way to hook up a wall plug by soldering some pins to power up the motors that move the seat.

Does anyone understand what this is saying and how to make this work? if it's even possible?





And I believe this is the only plug that hooks up to the car...

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Old 03-29-2012, 09:31 PM   #2
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maybe maybe not. gonna make it into a chair?
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Old 03-29-2012, 09:33 PM   #3
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maybe maybe not. gonna make it into a chair?
Yes... wanted to. but now I realized that I do not know JACK$H!T about electrical..... things.
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Old 03-29-2012, 09:37 PM   #4
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Uh, no. You'll need a separate power adapter for that. 120v is a bit off from the 12-14v most car electronics run on.
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Old 03-29-2012, 09:37 PM   #5
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Wall plug ??? are you nuts ? Hook them up to a car battery to test them. put 2 wires on a battery and the end into that socket, try different pins to find which one powers the seats. Should take 5 minutes
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Old 03-29-2012, 09:40 PM   #6
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Uh, no. You'll need a separate power adapter for that. 120v is a bit off from the 12-14v most car electronics run on.
Quote:
Originally Posted by Blocked Out View Post
Wall plug ??? are you nuts ? Hook them up to a car battery to test them. put 2 wires on a battery and the end into that socket, try different pins to find which one powers the seats. Should take 5 minutes
well I am pretty sure he knows that.
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Old 03-29-2012, 09:56 PM   #7
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You need to use a AC to DC adaptor (rectifier) to power the seat. I don't know if the seat requires any connections to the car modules in order to work though.
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Old 03-29-2012, 10:03 PM   #8
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Actually, i thought of something...

Instead of a wall plug, I can use a battery then.. right?

I can get some 12V rechargeable battery out of those Power Wheel toy cars that kids ride around in.. those are rechargeable and those power motors...
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Old 03-29-2012, 10:06 PM   #9
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There's a reason those power little tiny cars....and not huge car seats.

You should probably leave this to a professional and not fry the logic board on your $500 seat.
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Old 03-29-2012, 10:23 PM   #10
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Quote:
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Wall plug ??? are you nuts ? Hook them up to a car battery to test them. put 2 wires on a battery and the end into that socket, try different pins to find which one powers the seats. Should take 5 minutes
I clicked on the link in your sig thinking it was air suspension
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Old 03-29-2012, 10:31 PM   #11
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these would make awesome GT5 seats
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Old 03-29-2012, 10:38 PM   #12
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There's a reason those power little tiny cars....and not huge car seats.

You should probably leave this to a professional and not fry the logic board on your $500 seat.
There is no logic boards to fry..

The front two seats that I am currently trying to make a chair out of are spares. .. as in I have my power seats in my M3 and these were obtained separately.

They are not hooked up and all I am trying to figure out is how to power the motor that adjusts the tilt of the seat, the front-back movement, and the up-down motor.

And I'm pretty sure I can do this with a battery pack..

Thoughts?


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these would make awesome GT5 seats
Indeed they would.
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Old 03-29-2012, 11:26 PM   #13
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You don't adjust your electric seats that often, I'd be curious to know how long the batteries would last.
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Old 03-29-2012, 11:29 PM   #14
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You don't adjust your electric seats that often, I'd be curious to know how long the batteries would last.
I can get detachable, rechargeable ones..
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Old 03-29-2012, 11:49 PM   #15
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Its very hard to tell from those diagrams if it'll work just with a power source. Since the seats are memory, there must be a way for the computer to determine the positions of the seats. They may be stepper motors, which would make them impossible to control. Try connecting power straight to a motor and see if it moves.
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Old 03-30-2012, 12:05 AM   #16
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Old 03-30-2012, 12:22 AM   #17
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I have this AC-DC 12v/60A PSU that I use to power on my HID and other stuff for testing purposes. It's able to provide enough juice to power on the seats

http://www.ebay.co.uk/itm/ws/eBayISA...E:L:OC:US:3160
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Old 03-30-2012, 12:39 AM   #18
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Uh, no. You'll need a separate power adapter for that. 120v is a bit off from the 12-14v most car electronics run on.
Not to mention the whole AC/DC issue.
It can be done, and there ar devices made to do thi, but the fact that you asked if you could plug it in directly makes me think you need to read a lot more before trying this. This box is similar to what you would need. I don't know if 3amps is enough to power that seat without blowing it. I would guess it is closer to 8 to 10 amps. Itcan be done, but it is not as simple as wiring it up. You need a power inverter that transforms the 120VAC to 12VDC. That is what this device does.
http://www.amazon.com/gp/product/B00...M440TWAKNMXEP3
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Old 03-30-2012, 12:47 AM   #19
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Options:

1) hook up a car battery (not toy batteries) to the proper pins. You'd have to figure out which pins.
2) put them in your car, adjust until you're happy with the position, take the seat back out.
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Old 03-30-2012, 01:30 AM   #20
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you can get inverters that convert 12v to 220v (UK) ive looked at them to use in my garage to power a drill, hoover and the like, same thing as used in motorhomes, caravans etc so you can use ordinary home appliances on the move ie kettles hoovers etc so i would think its possible to get one that converts from 240v to 12v.

http://www.ebay.co.uk/itm/1000W-Car-...item4161852388
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