Member Since: 18 Feb 2016
Location: Effingham
Posts: 237
I fitted a standard 12v relay on each indicator circuit. I used the 12v feed from the car to feed both the switch and the power supply of the relay.
The relay can't respond quickly enough to transmit the canbus pulse to the trailer, but the load of the relay plus trailer led is sufficient to trigger trailer warning light on the dash.
I located both relays in the nsr locker in the boot. If you open the boot and listen carefully, you can hear the relays twitching with the canbus pulse.
This setup has worked fine for about 15,000 miles...
24th Sep 2016 10:38 pm
ostosix
Member Since: 19 Mar 2017
Location: Lincoln
Posts: 324
Cheers, ill have a go at that.
23rd Mar 2019 11:39 pm
Farmer Chalk
Member Since: 06 Mar 2013
Location: Independent Republic of Kentishshire.
Posts: 4197
I had this on my horsebox when I changed across to LED’s .... the indicators flash but the dash illuminator didn’t...
I fitted resistors across both poles...I.e across the positive and negative of the supply to the light... did one on both sides left and right indicator circuit and problem cured....
24th Mar 2019 6:54 am
M3man
Member Since: 03 Mar 2019
Location: Stoke-on-Trent
Posts: 28
Has anyone got an up to date satisfactory solution to this problem, my preference would be to buy a plug & play adaptor, can forum members suggest a solution ?
Surely a sensibly priced option should be available now
14th Jun 2019 9:35 am
Jamiehol
Member Since: 13 Nov 2015
Location: Ipswich
Posts: 394
There are plug and play solutions available in the Caravan market but sadly none of them are cheap.
14th Jun 2019 5:00 pm
M3man
Member Since: 03 Mar 2019
Location: Stoke-on-Trent
Posts: 28
Can anyone suggest a specific example that they're happy with ?
15th Jun 2019 5:37 pm
DirtBuddha
Member Since: 25 Feb 2019
Location: West Sussex
Posts: 31
I am replacing all the filament bulb lights on my trailer with LEDs and have the rapid-flashing issue.
I haven't bought one yet, but it looks like the kind of thing that should work.
Anybody use one?
5th Aug 2019 6:41 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10736
Why? Keep indicator lamps
And save yourself loads of money and hassle.
5th Aug 2019 7:17 pm
stew 46
Member Since: 01 Dec 2011
Location: cornwall
Posts: 10148
I have this problem on the camping trailer -------------------------------------------------
if you cant hold on dont let go , it ill come in handy for something even if you never use it.
D3 SE 05,
110 s wagon 300 tdi SOLD
h top transit
crew cab transit
transit connect
ausa dumper, muck truck .
peljob 2.5 digger
06 L 200 crew cab
5th Aug 2019 8:01 pm
sailorboi
Member Since: 26 Oct 2012
Location: Bristol
Posts: 2021
Stew I am going to be looking at this over the next few weeks as my trailer does the same
I will let you know what i come up with 07 Java Black TD V6 D3, EGRs Blanked, Tow bar, Full dog guard & divider, LED Spots , DRLs, GG ATs, RLD Sump guard, RLD Spare Wheel Protector, D4 LED Rear Lights, Limo tints on boot and Midnight tint on rear windows, Kenwood screen with Garmin nav, Rear cameras, D4 Steering wheel with flappy paddles, T-max split charge system, Tree sliders, Prospeed roof rack & Ladder, Alisport fast road inter cooler,
Massey Ferguson 35x
Sankey Narrow Track Camping Trailer (Gone but to a great home)
6th Aug 2019 4:20 am
stew 46
Member Since: 01 Dec 2011
Location: cornwall
Posts: 10148
Cheers Simon -------------------------------------------------
if you cant hold on dont let go , it ill come in handy for something even if you never use it.
D3 SE 05,
110 s wagon 300 tdi SOLD
h top transit
crew cab transit
transit connect
ausa dumper, muck truck .
peljob 2.5 digger
06 L 200 crew cab
6th Aug 2019 2:08 pm
Down&Dirty
Member Since: 17 Aug 2012
Location: Somewhere out back
Posts: 1293
Member Since: 15 Jan 2016
Location: GL
Posts: 10736
no
because they don't have a flasher relay
6th Aug 2019 4:18 pm
Down&Dirty
Member Since: 17 Aug 2012
Location: Somewhere out back
Posts: 1293
Ah right MY24 Defender 90 X-Dynamic HSE
MY18 Disco 5 HSE Santorini Black Now Gone.
6th Aug 2019 4:24 pm
Nasher
Member Since: 07 Mar 2009
Location: Clanfield, North of Pompey - UK
Posts: 2821
Nasher wrote:
Did a bit more to my trailer lights yesterday afternoon.
I can confirm that using the resistors plus relays means the car recognises a trailer is plugged in and stops the indicators flashing with the canbus test pulse.
It all still needs to be actually final fitted to the trailer, but that can wait a couple of months now I know it all works OK.
I've built individual light clusters for each side of the trailer, the brackets I've fabricated out of stainless steel and I’ve used waterproof LED light units so I can leave them on the trailer and reverse it into the water.
I’ve taken the added precaution of Conformal coating the backs of the LED clusters and used extra sealant.
The electrics box will be fitted to the upright of the winch post using a large Jubilee clip through a bracket on the back.
Click image to enlarge
I decided to play safe and mount the resisters outside the main box on a stainless plate, despite not believing they will get that hot as they are not used all the time. The plate will fit nicely under the upside-down ‘U’ section the winch is bolted to where the resistors will be protected and reasonably dry. Again I’ve gone OTT with sealant and Conformal coating despite the resistors being supposedly OK outside.
In this image I have a short lead connected up with a 7 pin plug just to test the system. When fitted to the trailer this will be a lot longer. The two cables entering the other end of the box will run up either side of the trailer from the light clusters.
Click image to enlarge
With the lid off the box the connections can be seen.
Click image to enlarge
Then with the external cables removed
Click image to enlarge
The PCB I made using a small piece of Strip board with through hole relays and rectifier diodes soldered on.
Click image to enlarge
This is how the light clusters will look.
Click image to enlarge
Click image to enlarge
Click image to enlarge
Nasher
Having done this to my boat trailer all those years ago now so I could run LED lights behind my D3 I've carried on using the same setup behind my D4.
But the whole system is now showing it's age and I need to dive in and overhaul it.
But I'm wondering if I need to.
Did things get updated between my 55 plate D3 HSE and my 65 plate HSE Lux?
Do I need this bodge to run LED Trailer lights behind my D4?
Will I still get the same issues as with the D3 if I plug LED lights directly into the D4?
It's a bit of work to try it so would appreciate any insight from those with later D4s who've tried.
Thanks
NasherHeaven doesn't want me, and hell is afraid I'll take over.
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