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Old 17 September 2015, 11:20   #131
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Originally Posted by Pikey Dave View Post
Nope. With the module fitted & no resistors, the Disco just didn't recognise the trailer. The parking sensors still worked, you could select off road height without getting the warning message about there being a trailer attached, nada! As sip as I fitted the resistors, everything worked as it should. My previous home made led lightboard just had the resistors & no fancy module & it worked fine.
But that's my point - the module is the interface - if it can't detect the trailer, why would it tell the car there is a trailer there?

What your resistors are doing is making sure the "obviously really not designed for LED" trailer lighting module can see something that looks like a traditional bulb. I suspect the LED cluster type (as in what manufacturer etc) will also play a big part in your issue. It would be interesting to see if you could get a different LED board & see if it does the same thing..... or if your board is detected by mine..... and all the other combinations!


Parallel story for illustration:
- I had a (rather badly designed) 13 pin plug dissassemble itself on me somewhere between the House & the Real Food Cafe in Tyndrum. First I knew of it was when the reverse sensors went ballistic when I parked. - The entire back end of the plug had unclipped from the bayonet and was swinging merrily on the end of the wire. (bayonet still locked in the car socket). Needless to say that plug was replaced at the first opportunity later that afternoon!


This also is another rant of mine - certainly about Fords, don't know if other makes do the same - but the indicator bulb failure is treated same as a car bulb failure - it flashes fast. So if the whole plug works loose and the car then can't "see" the trailer.....

How difficult would it be to light a light or put a symbol on the multieverything display to say a trailer is connected?

/rant


I honestly think we and caravanning forums will be seeing threads like this until EVERY trailer module supplier & OEM recognise that LEDS are here to stay and the black boxes of electronics are going to have to work with them.
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Old 18 September 2015, 05:10   #132
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Quote:
Originally Posted by 9D280 View Post
But that's my point - the module is the interface - if it can't detect the trailer, why would it tell the car there is a trailer there?

What your resistors are doing is making sure the "obviously really not designed for LED" trailer lighting module can see something that looks like a traditional bulb. I suspect the LED cluster type (as in what manufacturer etc) will also play a big part in your issue. It would be interesting to see if you could get a different LED board & see if it does the same thing..... or if your board is detected by mine..... and all the other combinations!


Parallel story for illustration:
- I had a (rather badly designed) 13 pin plug dissassemble itself on me somewhere between the House & the Real Food Cafe in Tyndrum. First I knew of it was when the reverse sensors went ballistic when I parked. - The entire back end of the plug had unclipped from the bayonet and was swinging merrily on the end of the wire. (bayonet still locked in the car socket). Needless to say that plug was replaced at the first opportunity later that afternoon!


This also is another rant of mine - certainly about Fords, don't know if other makes do the same - but the indicator bulb failure is treated same as a car bulb failure - it flashes fast. So if the whole plug works loose and the car then can't "see" the trailer.....

How difficult would it be to light a light or put a symbol on the multieverything display to say a trailer is connected?

/rant


I honestly think we and caravanning forums will be seeing threads like this until EVERY trailer module supplier & OEM recognise that LEDS are here to stay and the black boxes of electronics are going to have to work with them.
I think there's some confusion here. This is the module that is fitted. The trailer came without any fancy box of tricks, just the LED lights. Plugging these into the Disco worked to a point. The lights worked, brake light, indicators, side lights etc. But the car did not recognise the trailer was attached. On my old boat, I built my own LED lighting board & had the same results until I fitted the resistors to the indicators, then all worked fine. The disco sends a low Voltage pulse around 1/sec through the indicator circuits. The pulse is too short & too low a Voltage to light a traditional filament bulb, but the LEDs pick it up & start strobing. The car is looking for a filament bulb resistance which on a 21W indicator bulb is around 6 Ohm. When I spoke to the trailer supplier about the issue, he said not to worry, he had this magic box which solved the problem & he'd send me one, which he duly did. The module sits inline with the trailer plug. Car/trailer plug is wired in one side, LEDs are wired in the outgoing side. What the module is supposed to do, is sit on the end of the trailer lighting cable. The car sees this as a conventional trailer & assumes that the trailer is attached. The module receives the lighting inputs from the car & drives the relevant LEDs on the trailer, everybody's happy...that's the theory On the Disco this didn't work, I still had to put the resistors in on the car side of the module. I'm assuming that the Disco isn't using a Can-Bus signal to detect the trailer, it looks like a simple analogue LV pulse or a combination of the 2
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Old 18 September 2015, 08:53   #133
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AAAAhhhhhh Ok. I thougt the "module" you were talking about was the trailer lighting module in the Disco.

So,
- Without the "processor", your trailer lights go disco?
- You presumably therefore have the trailer lighting hooked straight to the loom? (i.e no module in the Disco?
- I don't know the DIsco to this level, but how does it do bulb failure indication? Beeps / Lights on the dash as in the old relay style or do you get an on screen message / fast flashing like a lamp on the Disco has gone?



I'm going to take a slight tangent here.....

Where does the cabling to the socket on the hitch come from?

You said the park sensors etc didn't switch off etc. That says to me that the Disco probably should have a module that it doesn't have..... Was the hitch a delaer fit?

I got the place that sold me my Mondeo to fit the hitch. After three separate "and you are absolutely sure this is the dedicated Westfalia / Ford Can talking module?" questions (....'coz I can't buy the module for the price you are offering to fit the whole lot for so I am a bit suspicious)..... and guess what. I plug the trailer in and out of the boot comes "beeeeep.....beeeeep.....beeeeep......".

"but it is for the Mondeo sir, look......" (yep, and for every other car on the planet that a bypass relay will stop the lamp failure warning flashing.......



I think you might be missing a module.....

Land Rover Discovery Towbar Wiring Kits

Looking at this if you have a Disco 4 the fitter would need to have poked your can bus to tell the Disco the module was present....


FWIW I got one of these fitted.
Ford Mondeo All Models 13 Pin Dedicated Wiring Kit Jun 2007 on 29060515RC
(note it has a "yes" on the Trailer LED box, but go up a level in the shop and not all Mondeo modules do - so you canlt generalise!)
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Old 18 September 2015, 09:27   #134
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The Disco towing electrics are factory fit. The actual towing kit consists of a couple of prewired sockets & a couple of relays that plug into the loom behind the NS rear light cluster. The warning light is built into the dash as per Nashers post. The towing electrics have to be enabled by the dealer or someone with software & cable. Mine were all factory done. Absolutely no problem with conventional trailer boards, just LEDs that are the issue.


.....sh1t happens.......
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Old 18 September 2015, 09:43   #135
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Quote:
Originally Posted by 9D280 View Post
But that's my point - the module is the interface - if it can't detect the trailer, why would it tell the car there is a trailer there?



What your resistors are doing is making sure the "obviously really not designed for LED" trailer lighting module can see something that looks like a traditional bulb. I suspect the LED cluster type (as in what manufacturer etc) will also play a big part in your issue. It would be interesting to see if you could get a different LED board & see if it does the same thing..... or if your board is detected by mine..... and all the other combinations!





Parallel story for illustration:

- I had a (rather badly designed) 13 pin plug dissassemble itself on me somewhere between the House & the Real Food Cafe in Tyndrum. First I knew of it was when the reverse sensors went ballistic when I parked. - The entire back end of the plug had unclipped from the bayonet and was swinging merrily on the end of the wire. (bayonet still locked in the car socket). Needless to say that plug was replaced at the first opportunity later that afternoon!





This also is another rant of mine - certainly about Fords, don't know if other makes do the same - but the indicator bulb failure is treated same as a car bulb failure - it flashes fast. So if the whole plug works loose and the car then can't "see" the trailer.....



How difficult would it be to light a light or put a symbol on the multieverything display to say a trailer is connected?



/rant





I honestly think we and caravanning forums will be seeing threads like this until EVERY trailer module supplier & OEM recognise that LEDS are here to stay and the black boxes of electronics are going to have to work with them.

Buy a Defender chap plug in drive off 😜
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Old 18 September 2015, 09:59   #136
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Quote:
Originally Posted by 9D280 View Post
I think you might be missing a module.....

Land Rover Discovery Towbar Wiring Kits
If you look carefully at those kits, they aren't compatible with trailer LEDs
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Old 18 September 2015, 12:17   #137
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If you look carefully at those kits, they aren't compatible with trailer LEDs
Yeah, that's my point..... I believe they (Westfalia) manufacture the tow kits for OEMs - if you look at the Ford link - only about 3 of the ones for Mondeo (and guess what - all post 07 when (I assume) things went "proper CAN") are "LED - yes"

Just had a quick look -
Defender No LED - No coding
Freelander - 1 & 3 - No LED or coding - 2 LED & coding
Disco 3 - No LED, No coding - 4 no LED but needs Coded.
Range Rover - again No LED bt a mish mash of coding or not

So, if you want hassle free LEDs and to stick with LR - Buy a Freelander 2!

A similar look at Ford:
Modeo - 2007 on Ok for LED
Focus 2011 on
Kuga 2013 on
Galaxty - 2006 on
Fiesta - 2008 on.

All bar the Fiesta need the vehicle coded.
My old focus went "disco" with the LEDS...... and it had a factory fit hitch.
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Old 18 September 2015, 12:18   #138
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Buy a Defender chap plug in drive off ��
Errr after I got the right module in the boot instead of some cr@ppy bypass relay that's exactly what I did!

And After my research for the above post I reckon that's coz the defender is likely still using the same electrical architecture of the Mk1 Landy!

(why change it if it works! )
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Old 25 October 2015, 13:38   #139
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My Disco 3 had the usual problems with the LED lighting board.

The lights strobed with the signals produced by the canbus system, and the car could not detect the lights attached.

Solved.

Used a combination of a bypass relay to filter out the flashing, and some 6.8 ohm 50 watt resistors.
I now a have a switch in the boot which needs to be turned on when towing.

The car knows a trailer is attached, so the trailer light on the dash works. The rear parking sensors also are disabled.
I've also been told the car runs a different ABS and traction control program when trailer is attached too.

This is my wiring diagram...
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Old 25 October 2015, 14:29   #140
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Quote:
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NB no fog light...

Are these available as well somewhere.

LED Fog light units and also the number plate lights ?

Or even a complete set ..
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