You don't need to increase the car fuse size for the lights, that's the job of the 7 way relay. The relay only samples the voltage on each wire, the 7 way relay then powers the trailer lights

It was good to see the problem with the brown fire. So many idiots do the jobs without testing. This is why I love these videos because everything is explained in normal English. No BS. In a way, it is good for me, as I have a lot of work LOL. I do not use scotch grips and I use a gas solder iron and use it to heat shrink too. But that is why I am a mechanic and not a fitter and get paid a lot more

p.s.. 16:40 You talk of needing a HIGHER rated fuse in the circuits your car uses for various functions. YET that canbus "box" is merely a relay box - fed DIRECTLY from the battery (fused at the battery) which itself POWERS the various RELAY operated lights on the trailer. The RELAY for each circuit it controls - draws extremely low current from the "control" circuit .. ie: If the side/tail lamp circuit is powered ON (in the vehicle) and the canbus see's that 2 amp is drawn "normally' - it will NOT see the extra 20 mA that the relay coil draws. It will ALSO NOT see whatever amperage the trailer side marker lamps draw - as THEY draw current directly from the battery - via the relay contacts. That is the same for EACH of the six other circuits in the 7 pin flat plug. NO TRAILER LAMP CIRCUIT - draws any current from it's identical vehicle circuit - as ONLY a relay coil - draws current from them. Putting say a 15 A fuse on a normally 10A circuit - may cause a future problem to BURN OUT THE WIRING, long before the higher rated fuse blows. The "can-bus trailer BOX - is merely a box containing 6 relays for each of the six "control" circuits - the relays FEED directly into the trailer - via the battery fused wired.

Thanks for the video mate. Really helpful, especially for a Cavan man who doesn't want to pay a mechanic!

I really love the videos from bodgit and leggit garage and so many are helpful. I love the way that it is not BS. Glad it is not raining as many of my call outs have been or needed to be done in rain or cold

Absolutely Brilliant Discourse on how to wire in a Canbus Relay to a 7 pin trailer Tow Bar. Professionaly, eloquently and precisely explained! What a God Send. Keep up the good work 😊👍

Hi do you need to run separate 2.0mm cables to the battery 1 for the caravan side and one for the bypass relay? Thanks

first time i really got impress by you , the way you teach its fantastic and explained all ups and down so well in detail cant thanks to you , but really really good teacher , thanks a lot

your vw golf cam belt fitting instructions made the job so much easier i never done one before but i managed it was so helpful with video

Absolutely Brilliant Discourse, professional, detailed and eloquently

How do I know if my car need can bus box for the tow bar wires?

thanks bod for showing us all this right the way through from fitting towbar its really helpfull ive recently got a focus and it will be one of the jobs ,just prpping for mot all new front suspension done .rear brakes to do and when mot gonna source a cheap towbar ,keep up the good work Ant from sunny Wales

If the live feed is direct from the battery why do you need to start to car to check it’s got power ?. Surely it will be under constant load ?. (I ask as I’m trying to get my head around wether it needs to be switched )

I didn’t really see the part we’re you got the power source from the battery to the canbus box, so do you have to run a separate wire through the car to the battery?

that thing you drilled a hole for is a rivnut,if you have a 12 volt socket in the boot why not use that instead of running a cable all the way to the battery?

Very interesting job well-done the tool you cannot remember the name of it called "Rivet Gun". You need to explain the tools you are using and it is very important. Wonderful explanation. Thanks ! The boring job taking the wire from back to the battery is more important for learners.

Excellent video very helpful. Answers all the questions

Stumbled across your video whilst trying to get an insight into tow bar electrics with Can Bus and PCT ZR2500 Relay.Unfortunately the van I have purchased has tow electrics in camper gas locker, noT standard practise and I need to move or isolate so no potential electric current is within box. I have chosen to isolate as don't intend to use the electrics on tow bar at this time. My intention is to remove 12V live from car battery going to relay, this I believe would prevent signal current going to tow bar plug, however I believe there would still be a small current going to the PCT Relay from the light cluster connections? My plan is to break these connections at PCT relay tape and put back into pillar column and seal entry hole, this I am hoping will remove any electric current in gas locker. I would appreciate your thoughts on my methodology. Thank you for these informative videos most helpful. Can you provide link for your can bus wiring tester. Thank you

off to this job tomorrow, thank you Big Man!

The special thing is called a rivnut or thats what I call them anyway 😉 Great helpful video cheers👍 Keep bodging

Hi , on my grand cmax ive got a fuse box near the left rear lights and a big red permanet live feed there, could i put the inline fuse red wire to this instead of going to the battery ?

How can i know if my car has canbus? I have renault clio 2 (2002), and i bought used towbar, now i dont know if i can just directly connect the wires or do i need that extra electric box u showed

thank you, very well explained.

Enjoy watching your video's thanks Going to give this a try myself. If my car has already got the harness as factory but I've already brought the universal kit. Can you power the harness with a 15a fuse and get the power supply form there instead of running the cable to the battery?

You know your stuff,I wouldn't know where to start with electrics well done good video both parts

Could you not use the 12v socket as your 12v supply to the relay

You make an easy job look hard mate Jesus

I was really impressed until the scotch locks came in to play 😂 thanks for the video anyway

Scotchloks in damp environments are so prone to failure or even fail before first use. Put them in the bin. Solder and heat shrink instead then you can forget that blue rats nest!!!

You dont upgrade the fuses when using this canbus box. The box is a bunch of relays and this negates the need to change the fuse. Heat shrink soldered connecters are tidier and make a better, weather proof connection. The name of the threaded rivet is "threaded inserts".

THAT TOOL IS ALMOST LIKE A THREADED NUT RIVETER LEON.NOT A LOVER OF SCOTCH LOCKS BUT IT GOT THE JOB DONE. WOW (LIKE IM SHOUTING LOL )

So we’re do you run the wire to the battery?

Great Video, Thanks for sharing!! Can I ask you what kind of tester you are using to see which wires are live? Is it something special because of the canbus system? Thanks again,Jim.

On the video it shows one fused wire at the battery. But in the boot you connect two from the front! Have I missed a part on this video?

Hi I have a 2008 mondeo titanium x estate. I’ve been told I need a Ford trailer module. Would you know if that’s true ?

After installing my towbar electrics, I have no indicator light on the dash, any ideas?

Hi, I enjoy your videos and thanks for posting. I am about to wire a towbar on my 2011 Toyota Avensis which has the Canbus wiring. My concern is I have a car trailer ( 1 year old ) with LED lighting and I also tow a boat trailer with the old conventual wiring. Do I need to have any additional fittings to cater for old and new trailer wiring systems being hooked up to my 7 pin socket. Thanks in advance.

If you used a standard phase tester to begin why did you need a can bus combatible tester later

Great tow bar videos man, made it look easy.

What does the canbus module do?

What length wire would I need from battery? I have a Citroen C3 Picasso 2011.

Love whatching your videos, well documented, great guy, Thanks

I can't belive you have used scotchlock's, they are about as reliable to use as just twisting the wires together!! why not solder and heat shrink the joints and do the job properly

CanBus box?? When were the CANBUS wires connected? Seen the video 3 times and can´t find it.

Not a fan of scotch locks. They just go in the bin.

Great presentation. Good clear instructions, Competent Diyer cant go wrong, Save yourself a fortune, Well done. *************

I found this a bit late. Cheers mate!

Why not use the back 12V aux connection right in front of you for power to the can box ? It's not switched as far as I know .... I could be wrong ....

Hi mate ,have question urgently. The tail light wire on my picasso has 2 wires ,so do I need to connect to both or just one. Also my brake light has 2 wires ,so do I need to connect both to the relay or just one wire. Also I read that the battery should be disconnected whilst connecting everything in ? And do I need to disconnet the minus of the battery when connecting in a fuse and positive wire to it.

Hi, what is that electrical tester? I can't find anything like it on amazon. They all seem to be for AC circuits or require an earth connection as well, whereas yours just looks like it has one connection to the wire.

Scotchlocks... The work of the devil. Also you should have taken the two tail light feeds separately from each side so that when you leave parking lights on the trailers parking lights work properly and not light both sides.

first of all great videos pal. i have been avoiding fitting towbars to can bus wired cars di you no what this box does and do these boxes work on all cars with can bus? keep the great videos coming!!!

what size cable is used from the battery to the 7 way bypass

hi as far as I'm concerned you don't need to remove the rear lights you can get the connections for both lights on the left hand side inside the boot you seem to make it much harder than it is ive been fitting tow bars on cars for years my way is much easier and better i would check this out it will be easier for you the tool you used is called a rivet nut tool i use these always if possible

Legend thanks 😊

Hi great video very clear Does the ecu need to be reprogramed after fitting the tow bar electrics ?

you make it look easy :) thank you

Hi...can I pick Your brain?! My trailer lights, indicators, brake lights and side lights all work when I plug it up to the 7 pin socket on my car. When I attach the trailer on to the tow ball and still plugged in, the side and rear lights on the trailer flicker and go out, however brake and indicators still work. I have noticed the towbar is a bit rusty. Would you have an idea what the problem may be? Thanks

Thanks for the vid but what if I have LED lights what do I do with the C2?

I turned off when he took out scotch locks 😂 imagine paying a garage to use those 😮

Can i not take the power from the 12v ciggy light above where your fitting it as trying to feed the wire from the battery is driving me nuts!!!

Why didn't you use the 12v plug in the boot for your power supply?

Can I use a multi meter with can bus wiring ?

the pct box , c2 for led lights ??? how connect

Do you need electric harness to wire a tow bar on a Peugeot 206s registered 2006April

very well explained tks

SCOTCH LOCKS ...NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .NO NO .

where abouts are you located i though UK but then you said Euros but cars are RHD , confused lol it is Gibraltar ?

can you not try flexi conduit to put the cabling in , electrician speaking ha

Hi bought a second hand unit and someone supplied with a canbus relay system I have wired it all into lighting for each colour and tap into brown wire on car for ground and a 12v power but seems the relay isnt going anything. Why??

do you need a fuse between the battery and the relay box?

How do I tell if the wiring is canbus on my car?

Very helpful top man

A threaded rivit tool for www.ebay.co.uk/bhp/threaded-rivet-insert-tool as an exabple

It’s a riv nut

It's called a "rivnut"

Can anyone Tel me if I can run power from the box to a light instead of going all the way to the battery cheers

rive nuts

Hi where can I get the box from ?

That tool is a rivnut gun

If at 1st you can't succeed. Don't worry ... Put your whole body between the work & the camera lens and just "talk" about what you are doing. Oh - you wanted to SHOW people what you were doing? Well fat lot of good that video is then isn't it.. Your body is mostly "always" between the lens & the work.

Scotchlok connectors - really????

how would i do this using a multi-meter.

The dreaded scotchlock I hate those thing and I’m a diy guy

cant find part one?

Rivnut

Rivnuts

38:45 I thought that noise was sparks from the live.

What is that box?

Clearly no idea what you are doing or what you are talking about... Not even talking about you combining the left and right taillight!

Hi can you tell me why my relay makes a constant buzzing when I switch it on is it because I’ve not got the other wires from relay to the lights yet cheeer

Rivnut