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Thread: Electric Brake Controller

  1. #21
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    Location of Trailer Brake controller plug??

    Quote Originally Posted by Mamil View Post

    Attachment 121744

    So looks like LR have thoughtfully provided all the connections ready to plug in an electric brake controller. Unbelievable that none of the "experts" I talked to (including my dealer) knew this, and wanted to run completely new wiring

    SO... Thanks for posting Mamil, its exactly what I wanted to find out! The only problem is I have taken the 'cliped' on cover under the airbag for driver's knee's but cant seem to find any hint of that plug. Can you possibly give me a bit more of an idea where the thing is hiding? I can see a black plug thats next the cover I removed, I assume its some sort of diagnostic port..... am I in the right area there?
    Thank you for you time
    cheers
    Andrew

  2. #22
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    Quote Originally Posted by youngandrew24 View Post
    SO... Thanks for posting Mamil, its exactly what I wanted to find out! The only problem is I have taken the 'cliped' on cover under the airbag for driver's knee's but cant seem to find any hint of that plug. Can you possibly give me a bit more of an idea where the thing is hiding? I can see a black plug thats next the cover I removed, I assume its some sort of diagnostic port..... am I in the right area there?
    Thank you for you time
    cheers
    Andrew
    Hi Andrew, the diagnostics port is on the far left of the driver's footwell, and the brake controller socket is on the far right. It's above the footwell light, which is probably why you can't see it because the light blinds you when you're looking for it, so take the bulb out to make finding it easier. Also my picture earlier in the thread is a bit misleading because it's clipped up in there, I had to unclip it for it to dangle down like that.

    By the way, I never did find a good place for the controller head, and in fact have now removed the brake controller completely because I ended up buying a caravan with override brakes so don't need an electric controller afterall

    Still, it was a fun project, and hopefully useful to others who do need one and get the same BS from their dealers about it needing all new wiring.

  3. #23
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    Hi all,
    any further thoughts on where to locate the dial?

  4. #24
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    Quote Originally Posted by jayray377 View Post
    Hi all,
    any further thoughts on where to locate the dial?
    I never did find a place I was happy to permanently mount the remote knob, so I came up with this instead....

    Brake controller remote.jpg

    The main unit is mounted under the driver's footwell and hard wired into the car electrics, and the remote just plugs into it's RJ45 socket and sits on the centre console near the gear knob when needed, and is stored in the boot the rest of the time. The plastic box was ten bucks from Jaycar, and the cable is the one that comes with the controller, though you can use a longer one if you want - it's just a LAN cable. I checked with Redarc that it wouldn't be a problem detaching the remote, and although they advised against it because the brake controller would not be "compliant" (because it doesn't work when the remote is unplugged, so technically you have a brake controller fitted to the car but it's not working), they said it would work just fine but to be careful with plugging and unplugging the RJ45 as the socket is a bit fragile!

    If you're using a brake controller a lot then you'll probably still want to find a permanent place to mount the remote knob, but I only use it occasionally so this solution suits me fine, and I didn't need to drill any holes in my dash!

  5. #25
    Peefjay Guest

    Trailer Brake Wiring

    Thanks Mamil, I've got a recent D5 and am keen to have a look for the plug. I wouldn't mind betting that The two D4's I have had and paid through the nose to get the brake controller fitted, probably have the plug as well. I read somewhere that the plug is actually a Ford plug from the mid 2000's. So who knows. Anyway I am sick of being treated with disdain when I ask these so called experts technical questions.
    Cheers
    Peefjay

    1976 RR
    1988 RR Hi line manual with Vitesse 4.2 conversion, long range tanks, suspension kit, still driving the old girl weekly.
    1999 Disco 2 TD5 7 seater
    2004 Disco 2 Classic TD5
    2007 Disco 3 S TD6
    2011 Disco 4 SE SD6
    2014 Disco 4 SE SD6
    2018 Disco 5 SE SD4
    And a few Jags






    Quote Originally Posted by Mamil View Post
    Well I've had some fun today! As I'm on holiday I thought I'd look into this brake controller thing a bit by going to a few "experts" - another dealer, two of the big 4WD accessory shops, and two local auto-sparkys.

    To cut a long story short, the dealer wasn't interested, and the other four all recommended the Redarc Tow-Pro Elite same as Bob and Willem. However, none of them had ever fitted one to a Disco Sport (though two claimed to have, but on further questioning it turns out was a Disco 3 or 4 instead), and all confirmed what my first dealer had told me that you need to run all new wiring, some said through the car by removing trim, and others under the car to avoid this. Prices varied quite a bit from $550 to $850 for supply and fitting.

    TBH none of them particularly inspired confidence that I should trust them with the job, nothing specific, they just didn't seem to be able to give straight answers to quite simple questions.

    So I came home and decided to do a bit of research for myself. First thing I found was the LR wiring diagram for the Disco Sport Australian Towing Electrics - Attachment 121742

    You can see from this that the blue "service brakes" wire seems to go from the trailer socket to a box labelled "Module - Trailer brake controller". Not only that, but the same module also has connections to a fused 30Amp supply from the battery, a ground lead, and a feed from the brake circuit - in fact everything you need for an electric brake controller.
    Getting excited now, I had a rummage around behind the panel in the driver's footwell, and sure enough I came across this plug dangling down which had all the wires as specified in the wiring diagram running to it

    Attachment 121744

    So looks like LR have thoughtfully provided all the connections ready to plug in an electric brake controller. Unbelievable that none of the "experts" I talked to (including my dealer) knew this, and wanted to run completely new wiring

  6. #26
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    Thought people following this thread might be interested in this from an American DS owner who found another location for the brake controller remote...

    Trailer Brake controller - Land Rover Discovery Sport Forum

  7. #27
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    Does anyone know where the fuse is on the D5, that runs the constant 12 volts to the pre-wired loom for the trailer brakes? (The plug above the brake pedal).

    Thank you.

  8. #28
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    Quote Originally Posted by Mamil View Post
    Thought people following this thread might be interested in this from an American DS owner who found another location for the brake controller remote...

    Trailer Brake controller - Land Rover Discovery Sport Forum
    Thanks for the link.

    Anyone used a wireless controller such as below?

    Portable Electric Brake Controller | Elecbrakes Pty Ltd

  9. #29
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    what pin does it end up in

    I have a uk import D5 and can't seem to get a brake output at the trailer end ?
    13 pin factory electric towbar

  10. #30
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    Quote Originally Posted by simonplanicka View Post
    I have a uk import D5 and can't seem to get a brake output at the trailer end ?
    13 pin factory electric towbar
    Electric trailer brakes are a U.S. and Australia thing, European regulations do not allow them. So, LRs destined for the U.K. market do not have prewiring for the brake controller or the blue brake wire at the trailer socket, as you can see by comparing the trailer wiring diagram from a Euro-spec DS below, to the one of an Oz spec DS I posted earlier.

    Euro trailer wiring.jpg

    Doesn't mean you can't use electric brakes, but you'd need to add all the wiring yourself instead of it being plug & play like the Australian models.

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