D4 Electric Trailer Brake Wiring

Hi White D4,
The earlier D3's had an issue with the indivator lights flashing like hazard lights when trailer in tow with LED tail lights.
This was due to the circuitry in the vehicle doing a continual pulse check via the indicator lights-hence why it will flash.
BUT on the D4 it works a little different, they have counter acted this to a point, no the lights will no longer flash, but if the "Led Adaptor Module" (see here home (www) ) is not fitted then you will still have problems with the reverse park sensors continually beeping when reverse is selected as they are supposed to turn off (the vehicle will not pick up on the extra load due to LED's operating instead of normal incandescent globes). Some poeple can live with this & some cant!

HTH. :)

If the D4 doesn't "find" a trailer with only LEDs on it, then the D4 should also go to "extended height" when put in Rock Crawl, as it doesn't see a trailer.

thanks Sniegy, I might try without it first as with my current Pathfinder R51 you have to turn them off via a switch in the back and i always forget so it hasn't bothered me for the last 3 years.

I have selective hearing so the missus tells me.:angel:

Thanks for your knowledge mate much appreciated, now only one sleep to go until i get my Disco 4.:D

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Originally Posted by Dingmark Jim

If the D4 doesn't "find" a trailer with only LEDs on it, then the D4 should also go to "extended height" when put in Rock Crawl, as it doesn't see a trailer.

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Jim, This is also possible as i have yet to try.

Quote:

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Originally Posted by White D4

thanks Sniegy, I might try without it first as with my current Pathfinder R51 you have to turn them off via a switch in the back and i always forget so it hasn't bothered me for the last 3 years.

I have selective hearing so the missus tells me.:angel:

Thanks for your knowledge mate much appreciated, now only one sleep to go until i get my Disco 4.:D

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Congrats, you will have so much fun in your new beast.

Hmm ........ so does this mean that the D4, like the D3, will not recognise that a trailer is connected if it has LED's period??

So no trailer stability, no disabling of the tranny adaptations (so that it doesn't 'learn' based on a trailer attached) etc etc?

This could be a bit of a problem !!

Cheers,

Gordon

If I connect my caravan (electrically) what should I expect the car to do?

I did test the connection and all the lights worked as required. I have LED tail lights and the clearance lights are standard bulbs. The car gave me no indication the caravan was connected other than the brake controller showing a connection.

Does the weight of trailer also need to be on the car for it to detect a van is attached?

Quote:

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Originally Posted by gghaggis

Hmm ........ so does this mean that the D4, like the D3, will not recognise that a trailer is connected if it has LED's period??

So no trailer stability, no disabling of the tranny adaptations (so that it doesn't 'learn' based on a trailer attached) etc etc?

This could be a bit of a problem !!

Cheers,

Gordon

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Gordon, Yes. Hence why we still recommend an LED adaptor module.
Once this is connected the vehicle will work as with normal incandescent globes.

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Originally Posted by mowog

If I connect my caravan (electrically) what should I expect the car to do?

I did test the connection and all the lights worked as required. I have LED tail lights and the clearance lights are standard bulbs. The car gave me no indication the caravan was connected other than the brake controller showing a connection.

Does the weight of trailer also need to be on the car for it to detect a van is attached?

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Mowog, The vehicle will not really do anything, it wont flash on the panel trailer connected or such. As u have found out the Electric trailer brake is an indication you have a trailer connected & it is sensing that connection.

The lights will work even if u do have LED's, but the ecu will not pick up drain from normal globes (incandescents) so it thinks a trailer is not connected.

Normally it would stop the Rear park sensors from working, so if u select reverse with trailer connected, it will probably continually beep at you, it trailer oscillation speed would decrease for trailer stabilty to operate correctly too.

Weight being connected to the vehicle has no bearing, the only system this gets working is Air Suspension, regardless whether you have a heavy trailer or the loaded with bricks.

HTH.

Cheers.

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Originally Posted by sniegy

Normally it would stop the Rear park sensors from working, so if u select reverse with trailer connected, it will probably continually beep at you.......

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I towed for the first time with my D3 last weekend, and was decidedly annoyed by the constant beep when reversing..... based on what you are saying here, my car didn't pick up that it had a trailer.... :confused:

My brother in-law's 05/06 D3 has a button that can disable the reverse sensors, I wonder why they did away with that...... :confused:

Quote:

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Originally Posted by sniegy

Gordon, Yes. Hence why we still recommend an LED adaptor module.
Once this is connected the vehicle will work as with normal incandescent globes.

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Thanks Sniegy, at least that's an improvement on the D3 - mine doesn't recognise the trailer even with an LED shunt module. By the way, when the D3 does recognise a trailer, it flashes a trailer icon when you first activate an indicator. Doesn't the D4 do the same?

Cheers,

Gordon

How much will the LED module cost?

Am I going to have to surrender my first born?

Actually I would be willing to surrender my youngest. He should be an asset to anyone because the little **** knows everything.