Electric brakes wiring
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  1. #1
    Fellow Frogger!
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    Icon7 Electric brakes wiring

    Hi,

    Has anybody had the necessary wiring fitted for a feed to a trailer plug to activate electric brakes?

    I am thinking in particular of Peugeot 307 / 407 vehicles, as they, amongst many others, provide signals to stop lamps, trafficators etc using a multi-plex wiring harness.

    The factory towbar has already been fitted, but I do not think it includes any special output other than that needed for a trailer etc for all the normal lights.

    Perhaps no special provision is needed, as I have seen some trailers , pop-tops etc with an adjustable electric brakes controller fitted onto the draw bar.

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    Cheers,

    K

  2. #2
    Fellow Frogger!
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    Quote Originally Posted by KIMDEB View Post
    Hi,

    Has anybody had the necessary wiring fitted for a feed to a trailer plug to activate electric brakes?

    I am thinking in particular of Peugeot 307 / 407 vehicles, as they, amongst many others, provide signals to stop lamps, trafficators etc using a multi-plex wiring harness.

    The factory towbar has already been fitted, but I do not think it includes any special output other than that needed for a trailer etc for all the normal lights.

    Perhaps no special provision is needed, as I have seen some trailers , pop-tops etc with an adjustable electric brakes controller fitted onto the draw bar.

    Cheers,

    K
    It's a long time since I looked at Electric Brakes but the system which I remember was a bit more than just running 12V out to the trailer. The controller used to be mounted below the dash so that you could vary the braking 'on the run'. Very useful with the older style (heavier) caravans

    If you have an external controller then presumably you can take a feed off the brake light wire at some point . Seven pin wiring normally has a spare wire called accessories that potentially could be adapted to do the job.
    Those people that say I know - generally don't.

  3. #3
    1000+ Posts Fordman's Avatar
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    Obviously, it depends on your type of trailer, which you haven't specified as yet. It seems most states have similar regs, but I suggest you check it out.
    Generally, up to 750 kgs (trailer fully loaded) does not require any brakes, but if the towing vehicle can only tow, for example, 500 kgs unbraked, then that is the limit - refer to car owners manual.
    Between 750 and 2000 kgs (trailer fully loaded) it must be fitted with brakes, either electric or over-ride hydraulic.
    Over 2000 kgs it must have electric brakes.

    As far as I know, electric brakes must be controllable by the driver, which requires a controller be fitted to the towing vehicle. I have not heard of a separate electric brake on a trailer operated only by the brake light signal, but that does not mean they don't exist.

    I have a good quality controller fitted to my wagon, it has a completely separate circuit leading to the trailer plug on the towbar, and there is a standard pin for trailer brakes in the 7-pin plug, to allow for inter-changeability of cars/trailers. So a similar arrangemant on a Peugeot with multi-plex towbar wiring would not affect the existing wiring, as long as they can pick up a brake signal wire at the drivers end of the car.

    Mine is a Tekonsha Prodigy controller, very common in caravan towing and with a good reputation. It has progressive application through some form of G-force sensor, possibly a pendulum thingy. It is adjustable on the road by driver input, but once set, works automatically when brakes are applied, and the harder the application the harder the trailer brakes work.

    Because I have an on-board battery in the caravan, at the same time I had the brake controller fitted, I had a separate 12V heavy duty power cable installed from the car battery to the towbar plug to run the caravan fridge while on the road, and to charge the caravan battery for lighting, etc. This power supply has a relay which is switched by the ignition, so power is only supplied while engine is running, to prevent discharging the car battery. The supply and install of the brake controller, the 12V power circuit, the relay and all the wiring was about $500 total. The job was done in a couple of hours by a specialist trailer brake auto electrician in Adelaide - good job done.

    Might I add here, that last year I put together a Oztrail camper 7 with a locally built 6'x3'6" steel box trailer, with swing-up jockey wheel, wind-down rear jacks, extended drawbar with spare wheel mount, Sunraysia wheels, new LT tyres and higher sides for total $3500, all brand new, required one day to mount the camper on the trailer, and ended up weighing 330kg, leaving 170 kg for camping gear, for a friend's Mazda 3 with a 500kg unbraked towing capacity. No brakes required.

    Any more info on what you actually require?

    Cheers.
    Last edited by Fordman; 3rd July 2011 at 11:26 PM.
    2004 Scenic I 2.0 auto (Hers)
    2016 Ford Territory (His)
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  4. #4
    Fellow Frogger!
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    Icon7

    Hello,

    Thanks for the replies,

    The towing specification for a 407 SV HDi Touring (V6 diesel twin turbo) is 1300kg for a braked trailer. We were considering something around 1000 kg (pop-top etc) which would obviously need the support of hydraulic or electric brakes.

    Some we have looked at have electric brakes as standard. This would be supported by ride-levelers etc, so we are really just investigating the options at present.

    Fordman, your analysis & summary is welcomed & we will keep in mind all options.

    Cheers,
    Kim.

  5. #5
    Fellow Frogger!
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    G/day Kim,
    Did you part company with your mobile home ?
    Chers Peter.

  6. #6
    Fellow Frogger!
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    Icon7

    Hi Peter,

    Yes, had a great year touring Aus, after which a year off was needed for other committments.

    Hoping to do it all again in another 12 months or so.

    Were you at this years FCD at Brookfield?

    Cheers,
    K

  7. #7
    Fellow Frogger!
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    G/DAY KIM,
    No neither of the girls could go due to work commitments and i didn't want to go by myself.
    Cheers Peter.

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