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RX 400h trailer wiring

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Old 10-15-13, 06:38 AM   #16
smassey321
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Watch this video and pause at 1:30. His hand is pointing at both the plug and where the connector will be taped (if equipped). Some people just remove the plug from below and can see the connector and plug in. I was able to remove my tool tray and then get my hand under the side tray to pull the connector loose from the tape that held it to the harness.

This video is for an install of an aftermarket harness in a RX that is not pre-wired but it shows where the factory wiring would be if equipped.

http://www.youtube.com/watch?v=d-KQLY5heJ0#t=1m30s

Last edited by smassey321; 10-15-13 at 06:44 AM.
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Old 06-09-14, 07:04 PM   #17
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Perchance, could someone take the time to post a picture of a hitch installed on you RX400h? Having a 3rd party hitch installed soon and would like to see how it actually looks.

Thanks
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Old 06-30-14, 05:40 PM   #18
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"Mine is an 08 model though, so I don't know if your 06 would be identical. I found my connector taped up to the harness over in the left hand corner, inside.

Good luck...Randy'


I have a 2007 RX400h and my connector was on the left under the plastic bin.
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Old 07-01-14, 09:03 PM   #19
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Default pictures of trailer hitch and wiring harness, 2007 RX400h

Here are 2 pictures I took of my recently installed hitch (Truck N Trailer) and wiring harness.
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Old 07-01-14, 09:05 PM   #20
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Sorry, couldn't get 2 pictures to upload together. Here is a pic of the trailer hitch
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Old 07-21-14, 03:50 PM   #21
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I just installed my hitch. I found the connector but what is the other connector for?


Also here is a tip for a one man install.. i used a jack stand to hold up one side.
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RX 400h trailer wiring-img_20140718_111705.jpg   RX 400h trailer wiring-img_20140718_102838.jpg  

Last edited by jooksing82; 07-21-14 at 04:08 PM.
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Old 08-19-14, 12:45 PM   #22
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Quote:
Originally Posted by CometVR4 View Post
We have towing prep package. Also I ended up getting the harness from Lexus for $50. It plugged right in, also it was a bit of a PITA to put everthing back together. I'm getting ready to head to NC with my ZX-14 in tow and the lights worked on the trailer.
Does any one have the harness part number. i want to get a non-OEM harness ( I have the 400h with tow package) and It looks like it is just wires with the connector at the end. I don't want to pay $50 for it. I do not want to install the T-connector since i already have a connector.( I think the second link is mislabeled t connector)

The sites say this do not fit but it looks like it my. Any thoughts.

Amazon Amazon

or

Amazon.com: CURT Manufacturing 56083 T-Connector: Automotive Amazon.com: CURT Manufacturing 56083 T-Connector: Automotive
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Old 09-23-14, 08:02 PM   #23
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Default 2008 RX400h Trailer wiring parts

I spent many hours trying to find the correct trailer light wiring for my Lexus. It's a Toyota part. 08942-48870-BB. You can get this at either your Toyota dealer or Lexus dealer. If you have a fuse in your fuse box labeled towing, you'll find a female socket in the drivers side rear cargo area tail light wiring harness. Simply plug 08942-48870-BB into it. I first purchased an aftermarket kit. Way overkill!
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Old 03-30-15, 11:02 AM   #24
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Quote:
Originally Posted by tjw914 View Post
I spent many hours trying to find the correct trailer light wiring for my Lexus. It's a Toyota part. 08942-48870-BB. You can get this at either your Toyota dealer or Lexus dealer. If you have a fuse in your fuse box labeled towing, you'll find a female socket in the drivers side rear cargo area tail light wiring harness. Simply plug 08942-48870-BB into it. I first purchased an aftermarket kit. Way overkill!
The million dollar question is is the OEM part just connectors and 4 wires? I am tempted to splice into it with
 this this
The price that they are asking $48 is way overkill if it is only 4 wires and 2 plastic connectors.
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Old 04-27-15, 09:37 AM   #25
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I got a $7 trailer wire extension from menards and a few quick splices and I am good to go. Used a multimeter to figure which wire was which. Add wire loom to it as well.
The colors of the wires actually matched up except for one of them. I managed to blow a few fuses using the multimeter on the small connector .
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Old 03-03-16, 10:58 AM   #26
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Quote:
Originally Posted by tjw914 View Post
I spent many hours trying to find the correct trailer light wiring for my Lexus. It's a Toyota part. 08942-48870-BB. You can get this at either your Toyota dealer or Lexus dealer. If you have a fuse in your fuse box labeled towing, you'll find a female socket in the drivers side rear cargo area tail light wiring harness. Simply plug 08942-48870-BB into it. I first purchased an aftermarket kit. Way overkill!
I have a 2006 Lexus 400h w/ the "Towing Pre Package" per the sticker, seeing the transmission cooler and other stuff. So with that said it appears from you and other posts all I really need is Plug & Play male socket to connect to the female behind the left rear panel or just tap into the wires with a 4 post flat plug? I see yours is a 2008 but I do not think they changed anything? Kick it back....................
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Old 03-03-16, 11:27 AM   #27
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Quote:
Originally Posted by arsooner View Post
I have a 2006 Lexus 400h w/ the "Towing Pre Package" per the sticker, seeing the transmission cooler and other stuff. So with that said it appears from you and other posts all I really need is Plug & Play male socket to connect to the female behind the left rear panel or just tap into the wires with a 4 post flat plug? I see yours is a 2008 but I do not think they changed anything? Kick it back....................
Correct. You can get the Toyota adapter or you can get a generic 4 flat wire plug and then tap into the wires (as was done in the picture above). It is pretty easy to take apart the forward rear hatch to see what is going on. Once you do that you will see that it is pretty easy. Do you need the 5th wire for trailer brake shut off? There is another post here that mentions where to find that. http://www.clublexus.com/forums/rx-2...-location.html

Last edited by smassey321; 03-03-16 at 11:30 AM.
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Old 03-03-16, 03:43 PM   #28
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Or....You can just buy an aftermarket trailer harness for that tow-package connector, like I did: http://www.clublexus.com/forums/rx-2...ge-option.html

I didn't want to pay the $50 for the Toyota harness so I found another one that fit perfect at a fraction of the cost.

ENJOY!
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Old 03-07-16, 07:24 AM   #29
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Originally Posted by checkerj View Post
Or....You can just buy an aftermarket trailer harness for that tow-package connector, like I did: http://www.clublexus.com/forums/rx-2...ge-option.html

I didn't want to pay the $50 for the Toyota harness so I found another one that fit perfect at a fraction of the cost.

ENJOY!
It seems the #1 issue is whether RX's have the "tow pre package" and if so what connector.
The easiest way is to go to your fuse box and see if you have a 30amp fuse in the slot marked as TOW. If you do you are ready to go. Yes, you can get a connector from Toyota or Lexus (same) to plug into the white plug you will find on the left rear cargo area under the left rear plastic storage holder. Now that connector will be $50 to $70. Your can go to any parts store, Walmart , about anywhere an get a good 18 guage flat 4 post for the vehicle for about $6. Cut the plug off the car and solder, butt-end or leave the connector and use plastic quick connects behind the factory plug.

NOW, if it does not have the 30amp fuse and there is not a connector in the left rear, you will have to install the call for $40-$60 connector and run a power wire directly to the cars 12v battery. Before you buy the more expensive set up check and see if the connector is in the left rear, someone many not have put the fuse in. )

Hope this put the question to bed...........................
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Old 03-09-16, 12:41 PM   #30
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Quote:
Originally Posted by arsooner View Post
I have a 2006 Lexus 400h w/ the "Towing Pre Package" per the sticker, seeing the transmission cooler and other stuff. So with that said it appears from you and other posts all I really need is Plug & Play male socket to connect to the female behind the left rear panel or just tap into the wires with a 4 post flat plug? I see yours is a 2008 but I do not think they changed anything? Kick it back....................
The point I was trying to make is that this link has the harness that is direct 'plug n play' if your RX already has the 'Towing Pre Package'. It's much less expensive than the Toyota harness:
Amazon.com: CURT 55255 T-Connector: Automotive Amazon.com: CURT 55255 T-Connector: Automotive

I know this harness works because it's exactly what I used for my RX330 w/ 'Towing Pre Package', seen here: http://www.clublexus.com/forums/rx-2...ge-option.html
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2008, 400h, connector, harness, hitch, lexus, oem, prep, prewired, rx, rx400h, tow, trailer, wire, wiring

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