Electric Brake Controller
Driver School Candidate
Joined: Feb 2014
Posts: 2
Likes: 0
From: CA
Brake controller for 2010 RX450h
I am buying a small travel trailer with electric brakes and I need to install a brake controller in my 2010 RX450h. If anybody has details on how to do it I would greatly appreciate it.
Racer
Joined: Oct 2016
Posts: 1,404
Likes: 215
From: Texas
I got my 2012 RX 350 on Sept 30th. On Oct 1 I was installing a Draw-Tite class III hitch and brake controller.
The dealer wanted $500.00 plus parts to install just the hitch!
I bought the hitch and wiring harnesses for $250.00.
It took me 8hrs to do myself and I know what I'm doing!
The hitch install took all of 45 min. The time consuming part was the wiring for the brake box and trimming the appearance moulding.
I still haven't decided how I want to mount an RV 7 blade wiring harness to the back of the RX 350.
I'm a little vain and don't want it to stick out like a sore thumb.
If anyone is interested in the way I wired a brake controller let me know. It will be and extensive write up and I don't have time to write it out right now.
Happy RVing
The dealer wanted $500.00 plus parts to install just the hitch!
I bought the hitch and wiring harnesses for $250.00.
It took me 8hrs to do myself and I know what I'm doing!
The hitch install took all of 45 min. The time consuming part was the wiring for the brake box and trimming the appearance moulding.
I still haven't decided how I want to mount an RV 7 blade wiring harness to the back of the RX 350.
I'm a little vain and don't want it to stick out like a sore thumb.
If anyone is interested in the way I wired a brake controller let me know. It will be and extensive write up and I don't have time to write it out right now.
Happy RVing
Last edited by gadgetman1; Jun 8, 2017 at 10:25 AM. Reason: spelling
Lexus Champion
Joined: Sep 2016
Posts: 2,047
Likes: 135
From: AB
dual axle 18 footer with 1 ton van, graduated with 32 ft. fiver with F250 HD towing special Super cab. There were pendlum type, manual type, tiee into brake hydraulic line
type. I think there are more modern electronic controller nowadays. Better have right one properly installed. Good luck.
Lexus Champion
Joined: Sep 2016
Posts: 2,047
Likes: 135
From: AB
I know this is an old post, but I'm hoping someone on here has installed a 7-pin trailer wire harness by now. I have a 2016 RX 450h with the trailer package. All I can find is a 4-pin install. I have a 6X12 enclosed utility trailer with brakes that's way under the 3500 lb towing limit. I need to know how to get the brake wiring done without butchering the wiring. The dealer was ZERO help!
Racer
Joined: Oct 2016
Posts: 1,404
Likes: 215
From: Texas
I'd suggest you let the trailer shop install one for you. Because of ABS it is not just simple matter of installing one. I started pulling camping trailers when kids were young,
dual axle 18 footer with 1 ton van, graduated with 32 ft. fiver with F250 HD towing special Super cab. There were pendlum type, manual type, tiee into brake hydraulic line
type. I think there are more modern electronic controller nowadays. Better have right one properly installed. Good luck.
dual axle 18 footer with 1 ton van, graduated with 32 ft. fiver with F250 HD towing special Super cab. There were pendlum type, manual type, tiee into brake hydraulic line
type. I think there are more modern electronic controller nowadays. Better have right one properly installed. Good luck.
CL Community Team
Joined: Apr 2001
Posts: 16,559
Likes: 1,385
From: Austin, TX
Check this out
https://en.wikipedia.org/wiki/Traile..._North_America
I dont like the colors they used as text does not show through.
Also remember the American trailer wires combine the turn and brake together .. so tp interface with Lexus, you need a module instead of straight tapping into turn signal [logically Turn OR Brake]. This what a 5 wire module gives you.
For 7 wire, you can take the 5 wire module and add 2 more wires by directly tapping into Brake and Power (Aux -> ACC/RUN). You have to make sure your Aux can handle the current needed by the trailer, and if not, you need to run a dedicated wire + fuse from the battery and add a relay which is activated by the switched power (Accessory/run).
Once the above is understood, you can search to see if the 7 wire module has a built in relay .. would require an additional run to +12v battery and then do the wiring of 5 + 3 more wires [12v, switched 12v, brake].
Salim
https://en.wikipedia.org/wiki/Traile..._North_America
I dont like the colors they used as text does not show through.
Also remember the American trailer wires combine the turn and brake together .. so tp interface with Lexus, you need a module instead of straight tapping into turn signal [logically Turn OR Brake]. This what a 5 wire module gives you.
For 7 wire, you can take the 5 wire module and add 2 more wires by directly tapping into Brake and Power (Aux -> ACC/RUN). You have to make sure your Aux can handle the current needed by the trailer, and if not, you need to run a dedicated wire + fuse from the battery and add a relay which is activated by the switched power (Accessory/run).
Once the above is understood, you can search to see if the 7 wire module has a built in relay .. would require an additional run to +12v battery and then do the wiring of 5 + 3 more wires [12v, switched 12v, brake].
Salim
Last edited by salimshah; Jun 10, 2017 at 07:28 AM.
Lexus Champion
Joined: Sep 2016
Posts: 2,047
Likes: 135
From: AB
Tried Google or Youtube search?
1st Gear
Joined: May 2023
Posts: 1
Likes: 0
From: nj
I got my 2012 RX 350 on Sept 30th. On Oct 1 I was installing a Draw-Tite class III hitch and brake controller.
The dealer wanted $500.00 plus parts to install just the hitch!
I bought the hitch and wiring harnesses for $250.00.
It took me 8hrs to do myself and I know what I'm doing!
The hitch install took all of 45 min. The time consuming part was the wiring for the brake box and trimming the appearance moulding.
I still haven't decided how I want to mount an RV 7 blade wiring harness to the back of the RX 350.
I'm a little vain and don't want it to stick out like a sore thumb.
If anyone is interested in the way I wired a brake controller let me know. It will be and extensive write up and I don't have time to write it out right now.
Happy RVing
The dealer wanted $500.00 plus parts to install just the hitch!
I bought the hitch and wiring harnesses for $250.00.
It took me 8hrs to do myself and I know what I'm doing!
The hitch install took all of 45 min. The time consuming part was the wiring for the brake box and trimming the appearance moulding.
I still haven't decided how I want to mount an RV 7 blade wiring harness to the back of the RX 350.
I'm a little vain and don't want it to stick out like a sore thumb.
If anyone is interested in the way I wired a brake controller let me know. It will be and extensive write up and I don't have time to write it out right now.
Happy RVing
Would you please, provide me with your wiring details? I would be highly appreciate for your advice- dealing with the same problem!
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CL Community Team
Joined: May 2005
Posts: 7,180
Likes: 1,721
From: VA
Nicki - welcoome to CL. Please be advised that Natecrna whose post you refer to and have asked for advice has not posted on this forum in 11 years. I doubt he ever comes to this forum anymore or even owns an RX350 third generation at this time.
Your best bet will be to send natecrna a private message as it may possibly be sent to him as an email. That does not mean he will get it or respond if it is received.
See these older threads https://www.clublexus.com/forums/rx-...tallation.html
https://www.clublexus.com/forums/rx-...g-harness.html
https://www.clublexus.com/forums/rx-...er-wiring.html
https://www.clublexus.com/forums/rx-...w-hitch.htmlIf
If you have the tow package the job will be easiier as it is prewired. What year is your RX and do you know if you have the tow package? This will help.
https://www.clublexus.com/forums/rx-...d-threads.html
If you don't go here to join Lexus Drivers, then enter your VIN to find the vehicle build sheet which will list your options. It also has the dealer service history. https://www.lexus.com/My-Lexus/account/create-account
The Toyota Highlander is a mechanical twin to the RX350. There is a lot of information about trailer hitch wiring on this link to the ToyotaNation forum. Scroll down a ways to find it.
https://www.toyotanation.com/threads...ations.264043/
You can probably do some google searching or use youtube to learn more about how to wire a brake controller to an RX.
Also etrailer.com has great installation videos is a great source to buy a hitch etc..
Your best bet will be to send natecrna a private message as it may possibly be sent to him as an email. That does not mean he will get it or respond if it is received.
See these older threads https://www.clublexus.com/forums/rx-...tallation.html
https://www.clublexus.com/forums/rx-...g-harness.html
https://www.clublexus.com/forums/rx-...er-wiring.html
https://www.clublexus.com/forums/rx-...w-hitch.htmlIf
If you have the tow package the job will be easiier as it is prewired. What year is your RX and do you know if you have the tow package? This will help.
https://www.clublexus.com/forums/rx-...d-threads.html
If you don't go here to join Lexus Drivers, then enter your VIN to find the vehicle build sheet which will list your options. It also has the dealer service history. https://www.lexus.com/My-Lexus/account/create-account
The Toyota Highlander is a mechanical twin to the RX350. There is a lot of information about trailer hitch wiring on this link to the ToyotaNation forum. Scroll down a ways to find it.
https://www.toyotanation.com/threads...ations.264043/
You can probably do some google searching or use youtube to learn more about how to wire a brake controller to an RX.
Also etrailer.com has great installation videos is a great source to buy a hitch etc..
Last edited by Clutchless; May 26, 2023 at 08:17 AM. Reason: update
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