Yep, did the search, worded things differently but only found one topic with no real ending, so here I am asking the knowledgable people on this great forum.
I have a 2014 Colorado twin cab ute with globe lights and a 2014 caravan with LED lights.
When van connected to the Collie the side and rear light on the van flash every 5 seconds or so. No drama that I am aware of and the post I read refered to resisters being fitted to the Collie wiring. I got a bit confused with the various comments in the topic, yes I know, that's not hard for me, never the less, confused.
The Collie will go in for a service early May so will probably get Holden to do the job as I don't like playing with the cars existing wiring. Is it something they will actually know about please?
Also has anyone lately had this problem and how did you go about fixing it
Please be gentle with me cos I'm confused enough now and getting older. I can't afford to lose another feather
Cadpete said
01:10 PM Mar 11, 2016
Hi Dougwe,
We had the same problem on our Trailcraft van. It is a conflict in the Collies computer in trying to decide wether the globes have blown or not - another case of making cars 'smarter'! Our dealer switched off the check in the Collie's computer so it is a known problem. I would refer you to the original thread in Techies but the search won't find it.
-- Edited by Cadpete on Friday 11th of March 2016 01:16:39 PM
Dougwe said
02:55 PM Mar 11, 2016
Thanks Pete, that's the thread my search found but got lost through reading it. Uncle Al got up first today mate.
I will make a note of that comment about the Collie and talk to Holden when I get to Townsville in a couple of months. I know them and them me as I bought the Collie from them and they have serviced it so know the car.
Woody n Sue said
10:04 PM Mar 11, 2016
IMHO pets is the money our VW Jetta used to bring up a light on the dash when we plunged the motor cross trailer on and it had led lights it cheesed me off enough that I wired in old fashion globes inside the trailer and it was happy then as Peter said ist trying to decide if there is a load there or a short darn computers are too smart for there own good sometimes
Woody
Cruising Cruze said
10:06 PM Mar 11, 2016
Hi Doug
Are you trying to make contact with Aliens again Doug
Cheers John
Dougwe said
04:58 PM Mar 12, 2016
Don't have to try John. I have a direct line now.
iana said
09:41 PM Mar 13, 2016
Hey Doug has this problem just started, or has it been with you since you purchased the rig?
Dougwe said
07:06 AM Mar 15, 2016
Sorry Ian, just noticed your question.
Since the day dot mate but haven't really bothered about it to be honest. I noticed a week ago you can JUST see them blink in daylight so thought I would try and sort it out.
-- Edited by Dougwe on Tuesday 15th of March 2016 07:09:14 AM
iana said
07:59 AM Mar 15, 2016
With the modern vehicles, and their computers, you can't just add things to the system wiring anymore. The Stop and park lights on my ute have got what are called "Cross over" relays in the circuit. When the stop or park lights are switched on, these relays are activated, but draw very little current, not enough to upset the computer. The power for the van lights are taken direct off the battery via the relays, so then it doesn't matter about current draw.
It may pay to check to see if you should have these cross over relays fitted.
Dougwe said
01:28 PM Mar 15, 2016
Thanks Ian, I have made a note of your comment as well and will discuss with Holden in Townsville at this stage.
The Phantom said
11:29 PM Mar 15, 2016
I have resisted to this stage but cannot hold back any longer.
The thread title reminds me of the old story about Paddy and Mick taking a car for a test drive.
Paddy (driving) asks Mick to stick his head out of the window and check if the flashing indicators are working.
Mick reports, "They are, they're not. They are, They're not. They are................."
Sorry
The Phantom
03_Troopy said
08:34 AM Mar 16, 2016
Douge, the body control module in your Colorado sends a pulse to your lighting system to check if your globes are OK. With LED lights, the load is not large enough and will usually trigger a blown bulb warning on your dash. The pulse may also cause LED lights to flash but isn't big enough to cause incandescent globes to flash. To overcome this, you need to have a trailer wiring adaptor that includes load resistors or relays to present a higher load to the control module.
Dougwe said
03:55 PM Mar 16, 2016
Thanks for your input Troopy. Will look into that as well.
rockylizard said
07:44 PM Mar 16, 2016
Gday...
... praps don't worry about it Doug .... flashing yellow lights will only enhance your safety as it warns everyone to stay well clear of you.
However, now that I think a bit more about it ........... flashing red lights might mean you are likely to 'solicit' attention - albeit perhaps some cash accruing attention. That could make those sometimes lonely nights at camps pass more quickly.
Then again, if you are sensibly fussy about the people you 'solicit' - it could not only be a valuable asset to generate a fund to pay for the travel ... it just might ..... not that I'D know ... but it might be just a little bit pleasurable.
Cheers - John
Phil C said
07:58 PM Mar 20, 2016
Gday Dougwe..
My advice is jack up the caravan and put a Ranger in front of it... lol (you knew I would say that)
Seriously, hold on should have an adaptor to go between your tug and the van. The fault is that the on board computer (in the hold on case 2 mice in a cage) doesnt recognise the lower voltage drop over the LEDs and needs a resistor to drop the rest of the voltage. Ford is the same, but as I said they have an adaptor for these things.
Hope you are well old mate, we are in Perth now after a fabulous trip across from home.. I will put up some pix soon. BTW the Ranger didnt miss a beat..
Luv ya bro
Dougwe said
08:13 PM Mar 20, 2016
Hold on mate, I never pick on your fix or repair daily, now do I.
I am staying put on the NSW coast for a few more weeks so might go chat with a Hold on dealer at some stage.
The Collie us performing real good mate. This light thing is not really bothering me but should get it sorted I spose.
Must contact the king of paint brushes soon, make sure he's not working too hard.
ken thomas said
04:19 PM Mar 21, 2016
Hello Doug
Had the same trouble with the ranger and put resisters in the 12 pin plug to the tail and parkers and all good now
When I get the next van I will get the leckies to put resisters at the lights
Ken
Phil C said
08:18 PM Mar 21, 2016
Luv you Dougweeeeeeee
iana said
08:45 PM Apr 13, 2016
Just wondering if you got the lights sorted. I was looking at the "cross-over" relays on my ute which reminded me of your (ute) problem.
03_Troopy said
07:08 AM Apr 14, 2016
Not many use relays that I know of (and it's change-over, not cross-over), most use resistors in them. Just search for towbar wiring adaptor or similar for your vehicle.
How, all.
Yep, did the search, worded things differently but only found one topic with no real ending, so here I am asking the knowledgable people on this great forum.
I have a 2014 Colorado twin cab ute with globe lights and a 2014 caravan with LED lights.
When van connected to the Collie the side and rear light on the van flash every 5 seconds or so. No drama that I am aware of and the post I read refered to resisters being fitted to the Collie wiring. I got a bit confused with the various comments in the topic, yes I know, that's not hard for me, never the less, confused.
The Collie will go in for a service early May so will probably get Holden to do the job as I don't like playing with the cars existing wiring. Is it something they will actually know about please?
Also has anyone lately had this problem and how did you go about fixing it
Please be gentle with me cos I'm confused enough now
and getting older. I can't afford to lose another feather 
Hi Dougwe,
We had the same problem on our Trailcraft van. It is a conflict in the Collies computer in trying to decide wether the globes have blown or not - another case of making cars 'smarter'! Our dealer switched off the check in the Collie's computer so it is a known problem. I would refer you to the original thread in Techies but the search won't find it.
Found original post -
http://thegreynomads.activeboard.com/t59433616/brake-lights-on-van-flash-every-15-to-2-seconds-when-connect/
-- Edited by Cadpete on Friday 11th of March 2016 01:16:39 PM
I will make a note of that comment about the Collie and talk to Holden when I get to Townsville in a couple of months. I know them and them me as I bought the Collie from them and they have serviced it so know the car.
Woody
Hi Doug
Are you trying to make contact with Aliens again Doug
Cheers John
Sorry Ian, just noticed your question.
Since the day dot mate but haven't really bothered about it to be honest. I noticed a week ago you can JUST see them blink in daylight so thought I would try and sort it out.
-- Edited by Dougwe on Tuesday 15th of March 2016 07:09:14 AM
It may pay to check to see if you should have these cross over relays fitted.
I have resisted to this stage but cannot hold back any longer.
The thread title reminds me of the old story about Paddy and Mick taking a car for a test drive.
Paddy (driving) asks Mick to stick his head out of the window and check if the flashing indicators are working.
Mick reports, "They are, they're not. They are, They're not. They are................."
Sorry
The Phantom
Gday...
However,
now that I think a bit more about it ........... flashing red lights might mean you are likely to 'solicit' attention - albeit perhaps some cash accruing attention.
That could make those sometimes lonely nights at camps pass more quickly. 
Then again, if you are sensibly fussy about the people you 'solicit' - it could not only be a valuable asset to generate a fund to pay for the travel ... it just might ..... not that I'D know ... but it might be just a little bit pleasurable.
Cheers - John
My advice is jack up the caravan and put a Ranger in front of it... lol (you knew I would say that)
Seriously, hold on should have an adaptor to go between your tug and the van. The fault is that the on board computer (in the hold on case 2 mice in a cage) doesnt recognise the lower voltage drop over the LEDs and needs a resistor to drop the rest of the voltage. Ford is the same, but as I said they have an adaptor for these things.
Hope you are well old mate, we are in Perth now after a fabulous trip across from home.. I will put up some pix soon. BTW the Ranger didnt miss a beat..
Luv ya bro
I am staying put on the NSW coast for a few more weeks so might go chat with a Hold on dealer at some stage.
The Collie us performing real good mate. This light thing is not really bothering me but should get it sorted I spose.
Must contact the king of paint brushes soon, make sure he's not working too hard.
Had the same trouble with the ranger and put resisters in the 12 pin plug to the tail and parkers and all good now
When I get the next van I will get the leckies to put resisters at the lights
Ken