Power seat help

[Modagger]

Greetings!

As I every so often do, I was wandering around FB Marketplace trying to find things on my wish list. One of the things is a pair of reasonably priced (right), bucket seats that I could build bases for and use as shop chairs for visitors during the the many stop and chats during the day.

The other night, I thought, surely this must be a mistake. But no, it wasn’t.

Anyway, I got two leather seats from a 2002 Chrysler 300. Driver’s has power and heat. Passenger, just power. I’m not interested in getting the heat function to work, but it would be nice to have the power adjust feature.

It’s obvious where the 12v goes. Red/black two pin connector. But there’s another 7 pin connector and I can’t find a wiring diagram on line to help.

Has anyone done something similar or am I alone with too much time on my hands? Any guidance will be much appreciated.

Oh, this project is third in line, so no rush, but I would like to know if it’s possible.

Thanks
Be well
Jeff

 

[whateg01]

If you put power to the +12 and ground, do all functions you operate the way you want? I'm not familiar with those particular seats but for vehicles with memory functions I believe some of that is feedback to the computer. Obviously a couple of those wires are going to go to the heating element for the heated seat. Not Sure what else would be there.

 

[Wrench97]

Is the memory module attached to the seat? I don't believe it is, but here is the wiring diagram.

 

[whateg01]

Weight on seat for the seatbelt and airbag is another set of wires potentially.

ETA: or just look at the wiring diagram that was posted LOL

 

[Old tool guy]

Some of the wires will be sensors to tell the seat is occupied for the airbag and seatbelt functions.
(oops … typing in tandem)

 

[whateg01]

Synchronized replies should be an Olympic sport!

 

[larry4406]

Need adapters to use Makita/ Dewalt/ Milwaukee tool batteries (your choice of platform) so stools are cordless.

Cool project!

 

[RPH]

Looking at the wiring diagram I suggest relays to handle the motor and heater loads. No need for sensors. Use the large switch at the top of the print to drive the position motors. Heater, do you high temp all the time? If not, then some kind of temp control is needed.

 

[Modagger]

If you put power to the +12 and ground, do all functions you operate the way you want? I'm not familiar with those particular seats but for vehicles with memory functions I believe some of that is feedback to the computer. Obviously a couple of those wires are going to go to the heating element for the heated seat. Not Sure what else would be there.

I haven’t gotten to the point of applying 12v yet. It does have memory function but that’s not something I’ll be connecting. I’ll report when I put the voltage to it. Hopefully tomorrow.

Thanks whateg01

 

[Modagger]

Synchronized replies should be an Olympic sport!

 

[Modagger]

Need adapters to use Makita/ Dewalt/ Milwaukee tool batteries (your choice of platform) so stools are cordless.

Cool project!

I like that!

 

[Wrench97]

I haven’t gotten to the point of applying 12v yet. It does have memory function but that’s not something I’ll be connecting. I’ll report when I put the voltage to it. Hopefully tomorrow.

Thanks whateg01

The memory module is what controls the seat motors, there is not a direct wire from the switches to the motors like the old seats had.
You push the switch and it pulls down a signal from the module, the module then engages a internal relay to run the seat motor.
The switches themselves will not carry the current required to run the motor without burning out.
You are going to have to at minimum wire a relay block in to control the motors.

 

[whateg01]

I wonder if it's cheaper to just use a couple winch relays

 

[Wrench97]

I wonder if it's cheaper to just use a couple winch relays

They might be a tad big to get under the seat. plus you'll need to protect the terminals from objects and seat springs.

 

[Modagger]

The memory module is what controls the seat motors, there is not a direct wire from the switches to the motors like the old seats had.
You push the switch and it pulls down a signal from the module, the module then engages a internal relay to run the seat motor.
The switches themselves will not carry the current required to run the motor without burning out.
You are going to have to at minimum wire a relay block in to control the motors.

Wrench97

These are the modules I found under the seats.

I’m thinking that maybe I’ll just leave them in the position they’re in and if someone stopping for a stop and chat is uncomfortable, I may get some work done after they leave.

Jeff

 

[Wrench97]

Looking at the diagram again I do see that it says the modules are under the seat.
So you should be ok just connecting the red to hot and the black to ground.


Is the 6 pin connector you posted about yellow?

 

[Modagger]

Looking at the diagram again I do see that it says the modules are under the seat.
So you should be ok just connecting the red to hot and the black to ground.


Is the 6 pin connector you posted about yellow?

The pic with the large connector is the driver’s. Because of the two person memory?

 

[LXCam]

The memory module is what controls the seat motors, there is not a direct wire from the switches to the motors like the old seats had.
You push the switch and it pulls down a signal from the module, the module then engages a internal relay to run the seat motor.
The switches themselves will not carry the current required to run the motor without burning out.
You are going to have to at minimum wire a relay block in to control the motors.

Wrench, I put powered buckets out of a 2016 300 in my ram. And all I did was pick up the power leads into it. Granted I never did get around to installing the heater module but everything else worked perfectly.

 

[Wrench97]

The pic with the large connector is the driver’s. Because of the two person memory?

Look to see if one of the modules is unhooked.
Or if these colors match up from connector 2(C2)

 

[Modagger]

Look to see if one of the modules is unhooked.
Or if these colors match up from connector 2(C2)

Thanks wrench

First thing tomorrow morning.

 

[Modagger]

Thanks wrench

First thing tomorrow morning.

It doesn’t appear that anything is unplugged. Too hard to trace the wires without cutting open the harness so I’ll put 12v to them and see what happens.

 

[Modagger]

It doesn’t appear that anything is unplugged. Too hard to trace the wires without cutting open the harness so I’ll put 12v to them and see what happens.

I put the only 12v supply (besides the car battery) on and the relays only chatter. The amp output is only 2 so I suspect I’m going to need a few more jiggawatts.

Any idea what I need in terms of amps?

 

[Wrench97]

The Diagram shows a 20 amp circuit breaker.

 

[whateg01]

power seat motors draw more than 2 amps

 

[Modagger]

The Diagram shows a 20 amp circuit breaker.

Thanks Wrench

I was just now able to open the diagram. I keep getting an intermittent message telling me that to continue using the site I have to accept cookies.

 

[Modagger]

power seat motors draw more than 2 amps

Thanks whateg01

I figured I was a tad light on the amps when all I got was chattering from the relay.

 

[Ole Slewfoot]

They go pretty fast on 18V, so if you have M12 or similar, maybe aim for that.
A seat switch from a precomputreized vehicle connected to the big wires on the motors might be the way if it freaks about not being in touch with the central data core (timer module).

 

[no704]