Added power rear vent windows in my GX470. First world problem solved! (1 Viewer)

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MightyBombJAC said:
I always hated that the rear vent windows were manual in my GX (I guess I got spoiled in my old LX). Just on a hunch, I looked at pictures of the manual latch from a 100 series and it looked just like the ones I’m my GX so I picked up a LX window motor on eBay. I was right! Bolted right in. Big problem was figuring out how to wire it in. There are only 2 wires from the motor so you have to reverse polarity to make it close. Also, I wanted to make it look factory so I used the height control switch to open and close the window. I made a video of it because it would be too much to write to try to explain how I did it.



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Thank you for the write up I appreciate the work to you put in. Do you have part numbers and where you bought the relays? I was finally able to pick myself up a set of these motors and plan on using the same switch you did as it's just taking up space for me as well.

Thanks!
 
LX450JC said:
Thank you for the write up I appreciate the work to you put in. Do you have part numbers and where you bought the relays? I was finally able to pick myself up a set of these motors and plan on using the same switch you did as it's just taking up space for me as well.

Thanks!
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The 2 relays and relay harnesses I picked up at Pep Boys:

Dorman 88069 30 AMP 12 Volt 5 Pin Universal Relay

Novita RS40 relay socket
 
Yeah we all must be looking for those motors! Can’t find one.
 
Go to car-part.com - called rear quarter window motor. It's a search engine for nation wide junk yards. Got mine from Pam'sauto.com two motors for $135 shipped. Dont pay the Ebay prices.
 
You got a good deal. Granted I haven’t looked there but I called my local junk yard and they wanted $150 per side! I found mine from a CL part out.
 
So got some motors off of eBay. Picked up a Sienna switch as well. I just want to open both at the same time so a single switch will work for me. Got the wire and relays off of Amazon. The real issue is I am terrible with wiring so hopefully you all can help with wiring for a dummy. Can someone show me how to wire the back of the switch?
 
Do you have a DVM? How much were the switches from EBay?
 
Oh did you buy the connector that goes on the bottom of the relays? It has all the wires that you then tie to the swotches
 
Yes got a factory 3 way switch. And got the relays with the harnesses.
 
I'm working on the same project :)

I'm using a solid state device instead of relays, but same idea -- use the Sienna switch to open/close both windows by wiring motors in parallel and changing polarity to operate the motors.

There are a few different versions of the Sienna switch, but they have similar wiring. The latest version (switch is rounded like other gx/4r switches) does have momentary SPDT capability. If you look carefully at the switch harness plug (I had to use a magnifying glass), you'll see numbers for each pin. To use the Sienna switch, pretty simple. Pins 3/8 close, and pins 3/7 open. Also, pins 1/5 are for the illumination.




subspd said:
So got some motors off of eBay. Picked up a Sienna switch as well. I just want to open both at the same time so a single switch will work for me. Got the wire and relays off of Amazon. The real issue is I am terrible with wiring so hopefully you all can help with wiring for a dummy. Can someone show me how to wire the back of the switch?
Click to expand...
 
MiracleToast said:
I'm working on the same project :)

I'm using a solid state device instead of relays, but same idea -- use the Sienna switch to open/close both windows by wiring motors in parallel and changing polarity to operate the motors.

There are a few different versions of the Sienna switch, but they have similar wiring. The latest version (switch is rounded like other gx/4r switches) does have momentary SPDT capability. If you look carefully at the switch harness plug (I had to use a magnifying glass), you'll see numbers for each pin. To use the Sienna switch, pretty simple. Pins 3/8 close, and pins 3/7 open. Also, pins 1/5 are for the illumination.
Click to expand...

SO with this switch we don't need the relays?
 
With that particular Sienna switch, you still need some way to change the polarity. As an earlier poster observed, the motors do not share a common ground, and reversing is only accomplished via a polarity change.

So, if you want to use those vent motors, you either need a different kind of switch (DPDT), or, you use relays. Both can be used to drive the motors. Those motors use a remarkably low amount of current, until they max out -- less than 100ma, to approx 600ma at max load. That's why I decided to use solid state instead -- just smaller (I just have to find a case), and works well w/ the Sienna switch. Relays work too, you just need a couple, and they can either be SPDT, or DPST. But, they don't have to be those huge 30amp monsters used to turn on lightbar, fans, etc. A small set of relays to switch a few amps is all that is needed. Alternatively, if you don't want to mess w/ relays, you can use a different switch to accomplish the same goal. Momentary DPDT switch capable of switching a few amps is plenty for this project. But, it won't look as "factory" as the Sienna switch, which does look pretty cool (pun intended).

I thought someone posted a wiring diagram earlier. If not, I can make one later. I'm probably making it sound more complicated that it is.
 
Good information Miracle. I posted a switch that will work without the relays in an earlier post #39 on page 2, and the OP posted his wiring diagram that is easy to follow (I used it) if he wants to use the relays. I really wanted to simplify by just using the switch but I couldn’t find a good location to cleanly mount it because of its size and I didn’t want it on the gear shift console. But that’s the way I’d go especially if the other switches there aren’t being used (mine are) I’d stick it there, run a few wires and be done. The hardest part is cutting the rear panels and re-glueing the liner so it looks clean. Good luck, it’s an awesome mod!
 
Last edited:
MightyBombJAC said:
I always hated that the rear vent windows were manual in my GX (I guess I got spoiled in my old LX). Just on a hunch, I looked at pictures of the manual latch from a 100 series and it looked just like the ones I’m my GX so I picked up a LX window motor on eBay. I was right! Bolted right in. Big problem was figuring out how to wire it in. There are only 2 wires from the motor so you have to reverse polarity to make it close. Also, I wanted to make it look factory so I used the height control switch to open and close the window. I made a video of it because it would be too much to write to try to explain how I did it.



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So that I am clear... If I already have power and a ground at the back of the truck, all I need is two wires going to the switch?


I also want to do constant power to the motors so that I can move them at any time.
 
Same challenges here -- where to put the switch. The later model Sienna switches "look" like regular 4r/gx switches -- kinda round on the button edge. But, they mount differently -- they're a little bigger. I really want my switch mounted in that switch cluster to the left of the steering wheel, so it required some cutting of the both the plastic switch, and the plastic bezel itself. You can't tell on the surface -- it looks like factory, but it's basically held in place with a tight fit. And since the switch only has a single pole, I had to wire another device to toggle the polarity around.

It'll all work out, and I'm quite looking forward to the finished product. Not looking forward to cutting the rear panels, but I figure I'll eventually have molle panel (like OrangeBoxFabrication) over the Windows, so won't notice as much anyway.


evilorgoodtwin said:
Good information Miracle. I posted a switch that will work without the relays in an earlier post #39 on page 2, and the OP posted his wiring diagram that is easy to follow (I used it) if he wants to use the relays. I really wanted to simplify by just using the switch but I couldn’t find a good location to cleanly mount it because of its size and I didn’t want it on the gear shift console. But that’s the way I’d go especially if the other switches there aren’t being used (mine are) I’d stick it there, run a few wires and be done. The hardest part is cutting the rear panels and re-glueing the liner so it looks clean. Good luck, it’s an awesome mod!
Click to expand...
 
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