BMW seat install

[rydog1130]

Thank you Rob! One quick question and that is are the heat switches necessary for the whole seat to work? I thought I saw earlier in the thread people left them out? I know my wife would love the heat but I’m not concerned about it if it’s just an additional bonus to the seat. Once again thank you!!!

 

[Yooper74]

Not BMW seats but I just installed a set of 2007 mustang GT seats in mine. I think they fit really nice. Cut the 'feet' off of them so they would sit lower. Welded on a couple brackets and used the stock seat holes for the most part.

Friend of mine makes race cars out of that vintage mustang so he had a bunch of these seats he was selling. If anyone is interested I'm pretty sure he has more.

 

[71 CA Bronco]

The switches are only necessary for the heated seat option. For the power you only need to hook the large red wire to a 30A fused hot and the large brown wire to ground.

 

[71 CA Bronco]

not bmw seats but i just installed a set of 2007 mustang gt seats in mine. I think they fit really nice. Cut the 'feet' off of them so they would sit lower. Welded on a couple brackets and used the stock seat holes for the most part.

Friend of mine makes race cars out of that vintage mustang so he had a bunch of these seats he was selling. If anyone is interested i'm pretty sure he has more.

View attachment 523774

nice! ;d

 

[rydog1130]

Not BMW seats but I just installed a set of 2007 mustang GT seats in mine. I think they fit really nice. Cut the 'feet' off of them so they would sit lower. Welded on a couple brackets and used the stock seat holes for the most part.

Friend of mine makes race cars out of that vintage mustang so he had a bunch of these seats he was selling. If anyone is interested I'm pretty sure he has more.

View attachment 523774

If I was unable to find the seats i have the mustangs were my next goto! they look nice!

 

[rydog1130]

The switches are only necessary for the heated seat option. For the power you only need to hook the large red wire to a 30A fused hot and the large brown wire to ground.

Awesome,..... thanks!....called the salvage yard where I got the seats.... they still have the car the seats were in and are shipping the plugs! score!

 

[rydog1130]

Im not going to run the seat belts from BMW. Ok to remove the female buckle and wires? Looks like there's a cable inside a track attached to the buckle. I'm assuming its a switch of some sort when you're in an accident. Not sure if its just a sensor to replace belts or if it trips an air bag in the seat....thoughts?

 

[.94 OR]

I think that track is a shock absorbing spring when the belt comes tight. We removed it on the set we installed in the Yota project.

 

[71 CA Bronco]

Im not going to run the seat belts from BMW. Ok to remove the female buckle and wires? Looks like there's a cable inside a track attached to the buckle. I'm assuming its a switch of some sort when you're in an accident. Not sure if its just a sensor to replace belts or if it trips an air bag in the seat....thoughts?

Remove it. Its just extra BS you will not need.

 

[rydog1130]

Done....thanks

 

[rydog1130]

Any ideas why my seats work intermittently? I’m noticing when running the power to move them in to position that I’ll be able to adjust them and then the power will cut out and nothing. If I wait a awhile it’ll work again. There’s 2 brown ground wires and one hot. I’ve tried both brown separate and together. Seems to favor one single brown ground. Any pointers on what might be going on? This is a direct power from battery no fuse, should I have a fuse in the line? Not sure if I’m tripping some sort of internal overload limiter

 

[rydog1130]

I did some research on other sites and found that if seats are not being used they will go into sleep mode. Here’s is the supposed fix. Listed is the diagram and power inverter used. I’ll let you know if it works

Test 1:
GND to the 2 brown wires
12VDC to big red and red/white wire
Result: working, but timed out after a few seconds when not operating the buttons.

Test 2:
Same as above, but this time with a power supply set at 5VDC
positive to pin 2 (CAN_H)
negative to pin 3 (CAN_L)
12VDC to pin 7 (Lumbar support)

 

[71 CA Bronco]

Hey Ryan,
Interested to see what you find out. My seats don't have that issue at all. Wondering if the heated part needs to be connected for proper use? I would fuse those hots though. You don't want to burn something up unintentional.

 

[71 CA Bronco]

Just thought of something else. Are you using heavy gauge wire for the hot? If I remember right, that hot for the power seat option is beefy.

 

[.94 OR]

I had the same "sleep" feature on the BMW seats we installed last year. Seemed like the simple answer is to put a power interrupt switch to wake it back up. Maybe there is a simpler way.

 

[71 CA Bronco]

I wonder if it is specific to certain cars or years of the donor?

Just checked. My seats are out of a 2005 BMW 330ci.

 

[.94 OR]

I think it is. Some models had way too much crap on them which I think these seats did. I about pulled my hair out trying to figure out how to wire them. Stripped most of the stuff down just to the bare necessity and it worked for a while. Driver seat is not causing issues again.

 

[rydog1130]

Ok update, I hooked everything up except for the 12v - 5v converter (hasn’t shown up yet. I improvised with a cell phone charger that put out 4.5 v and 200 milli amps……NOTHING ….arghhh…..so we improvised again with 4 double A batteries putting out 6v w/ about 200 mAmp and BOOM seats work!!! I have both brown together, red power plus small black w/ red stripe on 12 v system and Orange/green wire getting 5v positive and all green negative. These are E92 seats out of a 2008 328i for reference

 

[rydog1130]

I also found this YouTube video where they wire in a NE555 pulse generator to the CAN L and CAN H leads to make the computer stay awake. https://m.youtube.com/watch?v=Y1lOHxfewRA Doesn’t look to hard in case the 5v trick does not work

 

[rydog1130]

Just ordered these as a back up plus the pin connectors pre assembled. Here’s the links to those parts

https://www.amazon.com/DAOKI-Genera...generator&qid=1628033156&sprefix=ne555&sr=8-6



https://www.amazon.com/HKBAYI®-10Pa...tor&qid=1628033014&sprefix=3+pin+jst+&sr=8-11