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12-08-2019, 03:39 PM | #1 |
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Recaro Sportster CS help with heated seat
I'm looking to get some recaro sportster for my e90 m3. I want heat but how does this work? Does it connect to the oem harness from the oem seat?
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12-25-2019, 01:35 AM | #2 |
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^ You need the M Performance Seats or the Sportsters and harness from AMX Max to plug right in and retain your oem heated seat button, I believe.
I am not sure how the standard Recaro heaters plug in, but they have a dual stage element with a button on the base/bracket of the seat if you go this route. Bump for confirmation. I don’t have factory heated seats but would like heated Sportsters, so I’m also wondering how the heaters would get juice. |
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12-25-2019, 08:13 AM | #3 |
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12-25-2019, 05:47 PM | #5 |
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12-25-2019, 05:50 PM | #6 | |
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https://www.gmpperformance.com/galle...-drivers-seat/ |
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12-25-2019, 10:30 PM | #7 | |
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12-25-2019, 11:25 PM | #8 | ||
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12-26-2019, 12:14 AM | #9 |
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Samm3y, is your heat hooked up now? If so, how’d you do it? I’d be fine tapping a power source and using the button on the CS since I have no factory heated seat button. Curious what the details are of tapping a power source.
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12-26-2019, 12:37 AM | #10 |
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Yah, I ran a relay on the 20amp cig lighter circuit so you can't leave them on when you turn the car off. The added load is just the relay coil, the seats have their own fuses/wiring going to the battery. Running the wiring is pretty painless, sorting the mounts, receptacles and coding out the seat airbags is more of a pita.
I'd love to implement the stock controls to them though and I'm very tempted to chop up my old seats for the elements. I never looked too hard into how BMW did the stock Elements, is it a single element or multiple? Are they using variable dc voltage like 3-12vdc for the various stages? Or are they using a thermistors and controllers for the heat?
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12-26-2019, 01:03 PM | #12 | ||
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the heater circuit's main power is connected to the battery, and the relay switch power source is the 12V switched power source which is the cigarette lighter circuit. This allows the seat to draw more wattage while allowing the circuit to use a 12V switched source as the trigger. It's a standard textbook relay circuit that should be pretty easy to implement. Now the OEM heater circuit, since there are 3 modes, I wonder if it is a PWM circuit or just 3 different step voltages to let the heater module do the work. I'll have to look if I can find some information on it on TIS. Edit: Quote:
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12-26-2019, 02:07 PM | #13 | |||
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12-26-2019, 02:24 PM | #14 |
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The actual 12V? you can either do it from the fusebox or directly from the battery for the power source.
For the 12V switched, in this example, it would be the Cigarette lighter circuit.
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12-26-2019, 02:57 PM | #15 | |
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12-27-2019, 09:24 PM | #16 | |
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12-27-2019, 09:43 PM | #17 | ||
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https://www.gmpperformance.com/galle...-drivers-seat/ |
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12-27-2019, 10:02 PM | #18 | |
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AMX performance has video on how they connect their harness for Recaros. You know I wonder if in the video, you just leave the switch on the recaro at the hottest, and you just use the OEM PWM signal to adjust it with the seat module.
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12-27-2019, 10:13 PM | #19 | ||
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I message Amx and he uses a custom heat pad for his seats. |
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12-28-2019, 12:00 AM | #20 |
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That makes way more sense now! Intersting about his custom heat pad. I mean..in reality, the heat pad is just a resistor circuit and is as hot as the amperage going through it allows.
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01-04-2020, 03:19 PM | #21 | |
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01-07-2020, 07:37 PM | #22 |
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So the harnesses from bmw I ordered came in and decided to test my theory on my X1. Just set it up like I said before and it actually worked!!! So excited install them in my M3 with oem intergration!
I'll be making a full post about this once I get to install them. Last edited by m3_tristan; 01-07-2020 at 07:43 PM.. |
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