Scheel-Mann Heated Seat / Aftermarket Heated Seat / JDM Vertical Switches / Electrical Yoda's?

[NorCalFJ100]

I read through the heated seat with OEM switch install thread 97' FZJ80 heated seat install with Toyota horizontal low/high switches

I also searched quite a bit. I am a total electrical beginner so I may have misses the answer somewhere.

I see the three wires on the OEM switches that control the Hi / Low / Ground, per the thread above.

First question, since I do not have OEM seats any longer, can I just tap directly into those wires?

There is a power and neutral wire for each heating element of course. My SM Seats came with a ready to go harness, but I am of course not using that since I have the OEM switches. I have taken the heating element connection wires and separated that from the rest of the harness. See pictures below. There is a black ground wire on one and a black wire with yellow stripe ground wire on the other. The 12V+ wire loops from one connector to the other, then one 12V+ comes out of that.

Second question, do I combine the two grounds and tap into the appropriate ground wire on the switch harness itself? Then for the single 12V+ wire I have, do I splice in a 2nd wire and feed that to the appropriate 12V+ Hi / Low connection on the switch harness?

I really hope this makes sense. If not, please ask away. My truck is all torn apart and want to get it back together tomorrow.

 

[NorCalFJ100]

LOVE THESE SEATS!

Here is a picture for reference as to the size difference between the XXL Vario and OEM

 

[Feldrian]

I'm in the middle of installing the heat wires for my Scheel-Manns as well. I'm splicing in to the connectors for the supplied switch though, so I make use of the relay that came with the Scheel-Manns. I have the same vertical Toyota switches that you do, mounting in a DVS shifter console.

Testing on the 4 wires to the Scheel-Mann switch looks like power, ground, high switch signal, low switch signal. Backlighting I'm assuming is internally wired inside the sealed switch unit with a power LED.

Looking at this wiring diagram

...See the attached wiring diagram from an overseas FSM.

[EDIT] Check the wiring diagram linked above for switch function.

 

[NorCalFJ100]

Darn. I already thought I was doing the right thing and started to chop up the Scheel-Mann harness.

Do you think the relay is critical? I thought because all the wiring is already in the truck with the OEM harness we didn't need the relay or fuse...

In the mud article linked above, there wasn't anyone who used the relay I don't think.

 

[Feldrian]

I don't have much choice - I don't see the OEM plugs in my LX450.

Also, just double checked the wiring diagram - My post above isn't accurate. Follow the .PDF linked.

 

[NorCalFJ100]

Ahhhh okay. Yeah it's so strange. The 80 had the plugs, but the Lexus didn't. I guess because the 80 came in Japan but the Lexus didn't??

 

[Feldrian]

Yeah, I've always been under the impression the only real difference with the LX was the grill and headlights. I guess the harness around the phone/ subwoofer/ console was different and deleted my OEM heater plugs.

 

[NorCalFJ100]

Yeah. Perhaps.

Well I'm just a bit confused. The thread I mentioned shows the heating element wires tapping into the connector under the OEM seat where the power seats hooks up. But since I have the SM, I'm wondering if I need to go hack off the connector on my old seats...

I'm way to mechanical to understand all this electrical. Lol. Wrong side of the brain

 

[Feldrian]

If it helps, I'm going to wire as follows [() denotes RHS]:

Pin 2 (1) - +12V
Pin 7 (5) - Hi signal (to SM harness)
Pin 5 (3) - Low signal (to SM harness)
Pin 6 (4) - ground
Pin 3 (2) - backlight
Pin 6 (8) - backlight ground

 

[Feldrian]

I'd suggest double checking how the OEM switches work directly with the the SM harness (without the SM relay). OEM runs the seat pad and back pad in parallel in high and in series in low. Not sure if SM does the same thing.

 

[NorCalFJ100]

Thank you @Feldrian I posted in that thread about using the oem harness. I'm so lost with electrical. But the hook up for heated seats seems so easy with the factory harness hookups on the LC's.

 

[jonheld]

On my LX450 I just replaced the supplied seat heater switches that came in the seat heater kit with the factory switches and mounted them in the Wits End ashtray mount. I uploaded a very basic schemo of the switches in the resources section.

 

[aviator31]

Are these seats available with manual controls also, or just electric? They look amazing!

 

[NorCalFJ100]

On my LX450 I just replaced the supplied seat heater switches that came in the seat heater kit with the factory switches and mounted them in the Wits End ashtray mount. I uploaded a very basic schemo of the switches in the resources section.

Well oddly enough there are connectors under the center console specifically for oem jdm Vertical switches. I guess this is only on the LC models and not the LC. I just need to get my heating elements tapped into that.

 

[TomH]

This recent thread might be helpful.

97 seat heater install with factory switches

So I know there is a whole other tread on this, but I wanted to write down my concise experience with my install. I had new seat covers from Land Cruiser Heaven installed this summer and while they installed them I had the upholstery shop install seat heats, but not the wiring. The ones my...

forum.ih8mud.com

 

[NorCalFJ100]

This recent thread might be helpful.

97 seat heater install with factory switches

So I know there is a whole other tread on this, but I wanted to write down my concise experience with my install. I had new seat covers from Land Cruiser Heaven installed this summer and while they installed them I had the upholstery shop install seat heats, but not the wiring. The ones my...

forum.ih8mud.com

Thank you. That was the thread I posted in my initial thread at the beginning.

 

[Delta VS]

Pretty sure you want some kind of relay in the mix for the SM heaters. They are a 15 amp circuit, not sure how/if the OEM wiring/switch is set up for that kind of thing. Might be fine without relay too, report back when your rig doesn't burn down!

 

[SLCFZJ]

I read through the heated seat with OEM switch install thread 97' FZJ80 heated seat install with Toyota horizontal low/high switches

I also searched quite a bit. I am a total electrical beginner so I may have misses the answer somewhere.

I see the three wires on the OEM switches that control the Hi / Low / Ground, per the thread above.

First question, since I do not have OEM seats any longer, can I just tap directly into those wires?

There is a power and neutral wire for each heating element of course. My SM Seats came with a ready to go harness, but I am of course not using that since I have the OEM switches. I have taken the heating element connection wires and separated that from the rest of the harness. See pictures below. There is a black ground wire on one and a black wire with yellow stripe ground wire on the other. The 12V+ wire loops from one connector to the other, then one 12V+ comes out of that.

Second question, do I combine the two grounds and tap into the appropriate ground wire on the switch harness itself? Then for the single 12V+ wire I have, do I splice in a 2nd wire and feed that to the appropriate 12V+ Hi / Low connection on the switch harness?

I really hope this makes sense. If not, please ask away. My truck is all torn apart and want to get it back together tomorrow.

View attachment 2529655

Any update on this? Just about to start down the same path with the Scheel Mann and factory vertical switches. Thanks

 

[jstouder]

After reading through all the threads on after-market seat heaters, I'm looking for some help on this. Here's my setup:

1. FZJ80 with OEM seat heater plugs (not in use currently).
2. Scheel-Mann heated seats fully wired direct to the battery with appropriate fusing and relays.
3. OEM switches from Japan (84751-60010, 84751-60020)

Do I use the OEM seat heater plugs and OEM switch and just splice the SM wires into that? If so, would someone please help me connect the dots between OEM and SM?

@Feldrian kindly posted the following for the OEM harness [() denotes RHS]:

Pin 2 (1) - +12V
Pin 7 (5) - Hi signal (to SM harness)
Pin 5 (3) - Low signal (to SM harness)
Pin 6 (4) - ground
Pin 3 (2) - backlight
Pin 6 (8) - backlight ground

SM (see pics)
Red/Orange (1)
Red (2)
Red Blue (3)
Black (7)

 

[BILT4ME]

@Malleus Can you help him with this latest one? You seem to be the wiring diagram guru.....