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04-06 DC Tundras installing aftermarket seat heaters w/ factory wiring/switches w/ Katzkin leather

Discussion in '1st Gen Tundras (2000-2006)' started by speedtre, Mar 2, 2020.

  1. Nov 16, 2022 at 3:12 AM
    #61
    abcinv

    abcinv OEM (+) Junkie

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    See if this works
     

    Attached Files:

    shifty` and cpapa1783[QUOTED] like this.
  2. Nov 16, 2022 at 6:52 AM
    #62
    Teutonics

    Teutonics New Member

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    Try the post above, and if that doesn't work, try a different browser. Both the document in the original post and the one above both work for me.
     
  3. Nov 16, 2022 at 7:19 AM
    #63
    AleHole

    AleHole PNW

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    Do I need 3 of these for each seat, so 6 total? Im just getting started on this project.
     
  4. Nov 20, 2022 at 9:21 AM
    #64
    AleHole

    AleHole PNW

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    I just lifted my drivers seat out to check out the wiring situation. I've read that PDF attached above several times and am under the impression there are supposed to be two unused plugs under the seat. Is that correct?

    I have two plugs but they are already attached and used.

    Are these the plugs I need to utilize for heaters?

    upload_2022-11-20_9-20-9.jpg
     
  5. Nov 20, 2022 at 9:39 AM
    #65
    shifty`

    shifty` Is the Gila Copter a love machine?

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    Is the one on the left actually plugged into anything wired? Or is that just a "dummy" receiver to protect it? I imagine the one on the right is probably for SRS/airbag sensor, hence it being wired.
     
    speedtre[OP] likes this.
  6. Nov 20, 2022 at 9:54 AM
    #66
    AleHole

    AleHole PNW

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    The one on the left only has 2 wires that swing around and appear to go back around to the plug on the right. Wiring is not my strongest skill thats for sure.
     
  7. Nov 20, 2022 at 12:26 PM
    #67
    abcinv

    abcinv OEM (+) Junkie

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    The plugs are under the removeable pad next to where the OEM seat warmer switches are located

    heater 3.jpg

    Is this what you're referring to?
     
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  8. Nov 20, 2022 at 2:24 PM
    #68
    AleHole

    AleHole PNW

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    No. The plugs under the seats…
     
  9. Nov 20, 2022 at 2:57 PM
    #69
    abcinv

    abcinv OEM (+) Junkie

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    I'll check mine out tomorrow, see what I can find.
     
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  10. Nov 20, 2022 at 3:06 PM
    #70
    AleHole

    AleHole PNW

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    That would be great!
     
  11. Nov 25, 2022 at 4:46 PM
    #71
    AleHole

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    Well after a lot of confusion regarding the plugs under my seat I finally think I have things figured out. I had to read that pdf file about 100 times and do some digging around but finally got my head wrapped around this. My truck has the factory plugs for the OEM seat heater switches under the console and I was looking under the truck seats for unused plugs that would plug directly into the trailer harness linked in some of the previous posts. The details on modifying the plugs are vague so hopefully this helps someone else out in the future.

    Order the 3 trailer harness wires and disassemble.

    You need the wires with the smallest pins (the red and white wires). 3 wires plug into the back of the seat side harness of each seat. The other end of the wires get connected to the seat heaters.

    IMG_4871.jpg IMG_4872.jpg IMG_4873.jpg
     
  12. Dec 3, 2022 at 10:13 AM
    #72
    DesertRoads

    DesertRoads Telecom Guy

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    Hmmm I might have to try this for my split cloth bench seat up front. If my Subaru with cloth seats can have heated seats, so can my cloth seat Tundra. :). I'll have to investigate on whether or not the wiring harness is there or not. Hopefully it won't turn into a big wiring project like my aux lights.
     
  13. Dec 3, 2022 at 10:16 AM
    #73
    cpapa1783

    cpapa1783 New Member

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    @DesertRoads i tried looking at the electrical diagrams (never done electrical before) and it might as well have been in Cantonese, I ended up finding a pretty good set of seats out of a ‘05 parts truck that is perfect, with that said I’m gonna end up selling this interior I had pieced together , just haven’t gotten around to listing it yet
     
  14. Dec 7, 2022 at 10:08 AM
    #74
    speedtre

    speedtre [OP] New Member

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    Sorry for my lack of replies, I haven't been online much lately....life has just been too busy. This is good additional info for anyone doing this. :thumbsup:
     
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  15. Mar 4, 2023 at 2:29 PM
    #75
    Bourbon

    Bourbon 2006 Tundra DC V8 4WD

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    I'd like to install heated seats (ok, actually my girlfriend is asking for it) in my truck so I'm placing orders this weekend for parts. I'm not getting seat covers, so wasn't planning on ordering the heating elements from Katzkin. Did anyone order from HeatedSeatKits.com, as shown in the original pdf? Just wondering how reputable/reliable that site is.

    Other question - ordering qty 3 of the Curt 51362 harness is enough to do both front seats, not one correct?
     
  16. Mar 6, 2023 at 7:59 PM
    #76
    speedtre

    speedtre [OP] New Member

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    Yes, three of the Curt harnesses total...and I recommend the seat heaters in my post below...they get nice and toasty on high.

    https://www.tundras.com/threads/04-...witches-w-katzkin-leather.63131/#post-1740902
     
  17. Mar 7, 2023 at 8:27 PM
    #77
    Bourbon

    Bourbon 2006 Tundra DC V8 4WD

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    Thanks - ugh I didn't get those, I must have overlooked your link. I ordered some from Summit Racing by Rostra, I plan to give an update when I get everything installed. Will be another couple weeks before everything is here.
     
    speedtre[QUOTED][OP] and CodyP like this.
  18. Mar 22, 2023 at 9:00 PM
    #78
    Bourbon

    Bourbon 2006 Tundra DC V8 4WD

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    I started on this today.

    I'm following the instructions in the PDF as well as the tips in this thread. I'm stuck on one part - the driver's side connector already has a wire populating position #3, where the PDF says "3: Ground (Existing)". I agree, there is already a wire existing there. What do I do with it? Splice it into the wire I placed in position #3, or tape it back? I attached a picture showing the white wire I added in position #3, and the contact I removed to do so.

    IMG_7824.HEIC.jpg
     
    Last edited: Mar 23, 2023
  19. Mar 23, 2023 at 4:22 AM
    #79
    BubbaW

    BubbaW Been Real

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    Looking at the pdf, it appears you are at Step 4: Finishing up the Wiring, which is the BQ2 step ??

    Might have other comments/questions but for now I feel you need to relook at the drawings.

    Pins 6/7, red/blk are the Hi/Lo feeds from Seat Heater Sw
    The white wire is in pin 3 and the 2 black wires you are questioning, are in pin 14

    SeatHeater BQ2.jpg
     
    Last edited: Mar 23, 2023
  20. Mar 23, 2023 at 6:53 AM
    #80
    Bourbon

    Bourbon 2006 Tundra DC V8 4WD

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    Sorry, maybe I'm not being clear. You cropped out the pin I'm asking about. I realized I said black wire above and may have caused confusion, I'm asking about the black wire I removed to add the white wire in pin 3.

    This is what I did for the wires shown:

    Pin 3: Removed black wire (yellow circle shown), added white wire, back heater negative
    Pin 6: Added red wire, heating elements positive
    Pin 7: Added black wire, cushion heater negative
    Pin 14: left existing wire, no touch

    So, what to do with the existing wire in pin 3 this guy refers to, but doesn't address? Splice it in or tape it back?

    IMG_7824.HEIC.jpg
     
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  21. Mar 23, 2023 at 7:38 AM
    #81
    BubbaW

    BubbaW Been Real

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    I'm with you now, some of the confusion was definetly on my part also.

    I looked at the BQ2 pic I placed above which was from the pdf you're following and assumed the notes the original poster placed there were correct.

    Where he says pin 6 and 7 are the + and - for the heating elements, that is not correct according to an 05/06 EWD. Pin 6 and 7 are you're HI/LO signals from the Seat Heater Switch.

    Long way around the barn, you indeed have to splice the white wire you installed to the "Removed from position 3" wire. The black wire removed from pin 3 was the Gnd for the Seat buckle switch.

    Seat Htr.jpg
     
  22. Mar 23, 2023 at 8:02 AM
    #82
    Bourbon

    Bourbon 2006 Tundra DC V8 4WD

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    Awesome, thanks for the info! I was worried I was removing a ground for something that needed it - that would definitely be the case if I left it out.

    Do you think I still wire both positive's to pin 6, and the cushion black to pin 7? I'm now wondering if hi/lo would function properly that way.
     
  23. Mar 23, 2023 at 9:10 AM
    #83
    BubbaW

    BubbaW Been Real

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    I'm not following what you're saying relating to "both positive's".
    Pin 6 is HI conductor from Htr Sw, Pin 7 is LO conductor from Htr Sw

    Let me ask it this way, speaking of drivers side only....

    1 Did you have a cable and connectors under center console area already pre-installed with your DC ?

    2 Was there a connector under your driver seat that the connector you're showing plugged into ?
    If so, a picture of that connector would be awesome, couple different views....one of face of connector and one of the other side where conductors go in.

    3 The 3 wires you are showing that you installed....red, blk and white....where do they hook up on other end ?

    The 2 little blk wires we mentioned already....for seat belt switch.
     
  24. Mar 23, 2023 at 10:30 AM
    #84
    Bourbon

    Bourbon 2006 Tundra DC V8 4WD

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    Haha sorry - a picture is worth a thousand words. A picture with words on it - priceless?

    Here's a few photos of where I am at. Including driver's side truckside connector showing that I have the white/blk, green, and red/blu wires needed for heat seating.

    When I said "both positives" I meant both red wires from the heating elements. Based on the EWD you attached I am not sure how hi/lo is supposed to work, the production heating elements appear to be 3-wire and I'm installing 2 wire.

    When the switch is in Lo Position:
    Current flows from pin 7 (seat heater negative) to pin 3 (gnd)

    When the switch is in Hi Position:
    Current flows from pin 6 (seat/back positives) to pin 3 (gnd)

    Is that what you're seeing?

    IMG_7829.jpg
    IMG_7831.jpg
    IMG_7832.jpg
    IMG_7834.jpg
     

    Attached Files:

    shifty` likes this.
  25. Mar 23, 2023 at 1:30 PM
    #85
    BubbaW

    BubbaW Been Real

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    Pictures definitely help and answer quite a few things, so thanks.

    Naw, that's not how HI/LOW works in our 1st Gen Tundras.

    That's the tricky part with your 2 wire pads you bought but doable. However, you'll have a few choices to make if you wish to be non-standard for our Tundras.

    We do indeed utilize 3-wire....2 heating elements and GND.

    In LOW, current flows from battery to Htr switch to pin 7 of the seat connector BQ2. Our system then places the heating elements in series, current flow thru each element is then same, less current = less wattage

    In HI, current flows from battery to Htr switch to pin 6 of the seat connector BQ2. Our system places the heating elements in parallel, voltage across each element is then the same, more current = more wattage.

    Good ole OHMS Law !

    Choice one....place both of your red leads(seat and back) to pin 6(HI) of seat connector and the 2 black from each element to pin 3. When you place your Seat Heater Sw to HI, it will turn on both elemnets.
    Choice two....place 1 red in pin 6(HI) and other red in pin 7(LO) and the 2 black from each element to pin 3. You then have choice, HI turns one of the elements on and LO truns the other element on.
    Choice 3....find or buy proper seat elements and hook it up standard.

    That might be confusing but best I can do :facepalm:
     
  26. Mar 23, 2023 at 2:45 PM
    #86
    Bourbon

    Bourbon 2006 Tundra DC V8 4WD

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    ...But the PDF is written for 2-wire pads. Unfortunately I jumped into this just following the PDF, rather than first looking at the EWD. I think I would have looked for 3-wire pads, although in all of my searches I don't recall coming across any.

    Sorry - I'm not asking how the 1st Gen production system works, I'm asking about the expected behavior of following the PDF. Clarification is below.

    I am going with Option 1. I'm trying to understand/confirm, when wiring my 2-wire pads up to the production switches, what will happen on Low and what will happen on High.

    When the switch is in Low Position:
    Current flows from pin 7 (seat heater black) to pin 3 (gnd). This would be both pads in series, if I'm not mistaken.

    When the switch is in High Position:
    Current flows from pin 6 (seat+back red) to pin 3 (gnd). This would be both pads in parallel, IF pin 7 acts as ground when switch is in HIGH.

    Attached is a photo of my proposed wiring. Any help is appreciated, would love to know if I'm thinking about this wrong. Thanks!

    IMG_7836.HEIC.jpg
     
  27. Mar 23, 2023 at 3:35 PM
    #87
    BubbaW

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    One of the main things I'm trying to get across is the heater switch is passing the battery positive either out pin 3 of switch or out of pin 5 of the switch.

    This is the part of your thinking that I am trying to convey is wrong and doing a poor job.
    Does the below pic make sense ?

    Seat Heater.jpg
     
  28. Mar 23, 2023 at 6:02 PM
    #88
    Bourbon

    Bourbon 2006 Tundra DC V8 4WD

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    It does, thanks for helping me with this. I still think I'm seeing this work - and my confusion was looking at the original seat heaters as being 3-wire. I don't know if that's right. It's just the EWD notation showing both heating elements in the same block.

    Below is the current paths I'm trying to show. Haha, ok if I get this wrong again I'll stop commenting!

    IMG_7838.HEIC.jpg
     
  29. Mar 26, 2023 at 9:48 AM
    #89
    Bourbon

    Bourbon 2006 Tundra DC V8 4WD

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    I installed my heating elements per the PDF instructions, and they work great. I think I was getting confused looking at the Toyota EWD and I took us down the wrong path there with the 2-wire vs 3-wire debate. After looking at it another time I figured it out.

    Just drove 11 hours yesterday to Sun Valley, ID where it is still very cold, and these seat heaters were worth ALL of the effort. PS seat belt warning works still, so keeping that pin grounded on #3 was the right call. Thanks @BubbaW for working with me on this!
     

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