Thread: Elec Brake Controller install to D4 - Perth Area?

Gday , Done my install to RSS following Sniegys intsructions and after a few re-reads of some steps got it done ok , you can get the diode from any electronic shop, cheap as .
Been using my standard LR tow hiych to tow my 1200kg camper with no probs , i have the D4 style hitch insert not the hang down (plough) type . People say they can fall out but imho i can not see how it can if correctly put in .

Originally Posted by sniegy

If you have any questions/queries just ask, happy to help. Shame you weren't closer!


Cheers

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Does anyone have the link to the DIY Instructions? And what do I need for the LED trailer lights on a D3?

Thanks

Originally Posted by roscolrd4

Please make sure the auto sparky KNOWS what he is doing and has prior LR Disco experience. I just engaged an auto sparky thru Ace electrics with specific instruction that he was to know what he was doing. Well he did not have a clue and said he had very little D4 experience nor had put on a P3 onto a D4 before - he said could not work out why there was tail light power at Pin 5 and 7. He did not have a D4 workshop manual.
After he finished there was no more tail light volts at pin 7, and pin 5 was not working properly. I went thru sniegy's notes again and then it made sense to me. I completely reversed all the sparky's work - reconnected the divided blue and brown wires in the loom and started again. I check the trailer connector with a trailer plug tester (that the auto sparky did not have!!) ..and all pins worked as they should with tail lights power at Pin 5 and 7

I did not need to remove the LHS tail light. The sparky was working on the trailer loom inside LH rear corner. He cut the blue wire? why. Can someone tell me what the blue wire does in the trailer loom??
Sparky cut the brown wire BEFORE it divided into the black and brown wires. No wonder why the Pin 7 tail light did not work any more. He connected the P3 thin red wire (brake sense) extension to the divided brown wire (this would then connect to pins 5 and 7, then fed the P3 thicker blue wire extension onto the red (brake) wire. The P3 blue wire is the power wire to activate the electric brakes, and the P3 red wire (brake sense) is connected to the brake light wire in the loom on its way to Pin 6. The sparky had the P3 red and blue wires the wrong way round ( i dont think he knew what each wire did or he forgot that he had wired the extension cable the other way round - P3 red wire to the cable black wire and the P3 blue wire to the cable red wire) and divided the trailer loom blue wire (? why) and the brown wire too early.
Sparky's P3 connection
http://www.aulro.com/afvb/attachment...1&d=1368965350

My repair to P3 end - notice I have changed over the wire colour connections - not critical if one knows whats going on at the loom end
http://www.aulro.com/afvb/attachment...1&d=1368965027

Sparky's loom connection - note blue wire cut, and brown wire severed too high before the black wire comes off. Result no tail light to Pin 7. Note that the loom red and brown have the wrong wires from the P3 connected also - wrong way around
http://www.aulro.com/afvb/attachment...1&d=1368965784

My repair work - reconnected the blue and brown wires that were cut earlier ( had to use some orange wire to join them back up again). Then cut brown wire after the black wire comes off. My black wire that is joined to P3 blue wire is now connected to the trailer connector end of the brown wire.
http://www.aulro.com/afvb/attachment...1&d=1368966395

If someone can tell me how to properly add photos to this Post I would love to add them here to show the botched job and the repair work that I had to do. I'll give the attachment a go but not sure I am doing it correctly.

Holy Shugar Crystals Batman.
WTF was this guy thinking?

I am so glad you have figured this out.
The blue wire is the for the rear fog lights & goes to pin no. 2.

I see this a lot with clients taking the vehicle to their chosen Auto Sparky & then coming back to me to repair as the Auto Sparky just looks at colours & think's just match the colours & all will be fine. Unfortunately that is incorrect.

Cheers

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Originally Posted by Scary

Does anyone have the link to the DIY Instructions? And what do I need for the LED trailer lights on a D3?

Thanks

Scary search this heading.
Electric Trailer brake wired-photo.

This is the heading of the post specifically for the D3.
If you have LED's then there are plenty of posts on this also. I use a module from Linear Electronic Design mounted permanently in my vehicle.

HTH
Cheers

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I saw in another thread that if I run the trailer without the brake controller it will lock the brakes (ie apply full brake force) all the time via the 12N plug connection.

Is that correct? I am picking up our trailer on Saturday and I won't have the controller fitted by then. It is only 680kg unloaded so I don't have to have the brakes working on the trailer to get it home.

Is the theory correct above? If so I guess I can get under the trailer and disconnect the brakes.

Originally Posted by Scary

I saw in another thread that if I run the trailer without the brake controller it will lock the brakes (ie apply full brake force) all the time via the 12N plug connection.

Is that correct? I am picking up our trailer on Saturday and I won't have the controller fitted by then. It is only 680kg unloaded so I don't have to have the brakes working on the trailer to get it home.

Is the theory correct above? If so I guess I can get under the trailer and disconnect the brakes.

Scary,
Does the trailer you are picking up have trailer brakes as it is under 750Kg? Or did you specify that you wanted them?

If it DOES have them, then DO NOT turn on the lights (&/or switch the headlights off the auto option)
As the 2nd park light circuit is run to pin no. 5, this is where the blue wire for the trailer brake feed will eventually go.

HTH
Cheers

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