Electrics Tow Bar Wiring Help please - Civinfo
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post #1 of 22 (permalink) Old 1st June 2008, 09:42 Thread Starter
 
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Tow Bar Wiring Help please

Hi - this is my first post as the proud (at the moment) new owner of an 07 EX diesel.
I want to add a towbar and although I'm fairly experienced doing it on older cars and the bar is no problem I need some clues as to the wiring.
I assume I'll need full bypass relays and I believe it doesnt need "low voltage or pulsed signal wiring kits.
Is this all correct and any further hints or tips on fitting would be much appreciated.
Thanks
Chris
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post #2 of 22 (permalink) Old 2nd June 2008, 09:51
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I used a Witter HN61Q tow bar (£215) with a 7 pin car specific wiring kit (£111) from Towequipe.

The tow bar itself just bolts on instead of the rear crash bar. I used a removable ball because I have reverse parking sensors fitted.

The (expensive) wiring kit has interposing plug-sockets to connect to the rear lights as well as provision to inhibit the rear fog lamp and reverse parking unit when there is a trailer connected.
The wiring kit includes an electronic unit which does all the extra flash rate / bulb failure stuff.

The biggest bug-bear is just the amount of trim and panels that have to be removed to get the tow bar and wiring loom in place. See the parking sensor Wiki for some info on removal of the rear bumper and trim.
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post #3 of 22 (permalink) Old 2nd June 2008, 13:03 Thread Starter
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Thanks ATmega168 (what a mouthfull )
I still need top know whether I can use the much cheaper version of relays and crimps. Its only for occasional use and the towbars no problem from Towsure (about £65 + vat) as Ive a trade a/c.
Thanks Chris
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post #4 of 22 (permalink) Old 1st August 2008, 01:34
 
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Hi just fitted towbar used 7 core cable and audible indicator relay,no problems.
cable colours on my car are, behind left boot panel block connector to back lights.
red cable lights
blue cable indicator
green cable brake.

cable colours on right side behind panel are.
red cable lights
brown cable indicator
green cable brakes

On the wiring loom on right side near wheelarch were the cable goes to back lights in tailgate,there is a plug taped to the loom you need yellow wire to connect fog lights.hope this helps fitting towbar is very easy.
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post #5 of 22 (permalink) Old 14th September 2008, 17:36
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Quote:
Originally Posted by honda4life View Post
Hi just fitted towbar used 7 core cable and audible indicator relay,no problems.
cable colours on my car are, behind left boot panel block connector to back lights.
red cable lights
blue cable indicator
green cable brake.

cable colours on right side behind panel are.
red cable lights
brown cable indicator
green cable brakes

On the wiring loom on right side near wheelarch were the cable goes to back lights in tailgate,there is a plug taped to the loom you need yellow wire to connect fog lights.hope this helps fitting towbar is very easy.
I read your post to say that (apart from the thing to beep when you indicate) you didn't use any sort of relays or other electronics to separate the trailer from the car wiring. In other words, just what we always used to do on cars until recently. Is that right? Is there any point spending £100 plus on car-specific wiring?

Silly question - have you actually tried it with a trailer yet?
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post #6 of 22 (permalink) Old 14th September 2008, 19:40
 
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Hi only used one relay from halfords. yes i have tried it just done 900 miles with caravan. and also used with trailer.I think the car specific wiring just stops you from splicing into car loom and you just unplug light cables ,and rejion with the new blocks on the new wiring loom.
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post #7 of 22 (permalink) Old 17th September 2008, 19:04
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Thanks very much. I've just bought a second-hand towbar and I've no worries about fitting it now - seems like the electrics should be just like any other (older) car.
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post #8 of 22 (permalink) Old 26th February 2015, 20:05
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Hi, I've just got a 1.8 mk 8 and need to fit a tow bar for trailer. Does the civic have a socket to plug into rather than cutting into car wiring.
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post #9 of 22 (permalink) Old 26th February 2015, 20:07
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I think you can buy a separate harness to save cutting/soldering, they ain't cheap tho

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post #10 of 22 (permalink) Old 26th February 2015, 20:23
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I think you can buy a separate harness to save cutting/soldering, they ain't cheap tho

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You can buy nearly all connecting plugs used by all manufacturers and make your own for a fraction of the cost. It's just identifying the correct plugs. It also helps having a tame auto electrician to call on.
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post #11 of 22 (permalink) Old 26th February 2015, 20:28
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I had a dedicated oem plug in job on my crv and it was so easy to fit but I did notice that there was modules in line it wasn't just connector plugs and that's why me too I'm after an oem one
If I can get a few people interested I may contact someone to see if we could get some money off as I don't want to cut into the loom to fit one myself.
Wardy

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post #12 of 22 (permalink) Old 26th February 2015, 20:59
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I would be interested. Having looked online the Americans have this sewn up and at reasonable prices.
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post #13 of 22 (permalink) Old 29th March 2015, 09:13
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The hardest thing I found with fitting a towbar was the bumber removed and then getting it to fit back on nice, had to dremel away the bottom of the bumper for the towbar not to foul on it.
The one I fit was second hand so I took the time to treat all the areas with surface rust, welds and exposed fasteners first.
Wiring is quite easy, although I didn't wire in the caravan lead, just the one you'd use for a bike rack.
I didn't need any relays, and all is functioning fine. Just bring the cable up through one of the existing grommets, and use something like run+tap 3M connectors.
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post #14 of 22 (permalink) Old 29th January 2016, 17:26
 
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Hello i have just joined this forum. Car is a mk 8

I am looking for help.

I have bought a witter detachable towbar and 7 pin electrics from PF Jones.

I have paid a garage to fit the towbar and electrics. They have fitted the towbar but say the 2m cable supplied isnt long enough, as they want to connect near the rear passenger door.

The supplier says it is long enough but im caught in the middle.


I have tried to take the interior apart and can see behind the rear wheel arch cover and see the loom.

i want some help to be able to take the rear wheel arch cover off and see if the loom goes down to the boot, but struggling to get the full cover off.

Any help would be greatly appreciated, i dont want to break any of the trim.

also is the 7pin electrics just solder and heatshrink?
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post #15 of 22 (permalink) Old 29th January 2016, 17:30
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Welcome to

The garage are correct, you need to get to the front of the rear wheel arch to pick up the reversing cable. If the cable isn't long enough, then extend it.

Getting the interior out is a pain, Google for a solution (it's been a while since I removed mine). If I get a mo, I'll take a look for you.

I soldered my connections, no issues since.

Good luck.
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post #16 of 22 (permalink) Old 29th January 2016, 19:48
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Have a read of this, sounds very familiar to what I needed to do on my 5 door http://www.civinfo.com/forum/bugs-fa...tml#post363010
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post #17 of 22 (permalink) Old 29th January 2016, 19:50
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post #18 of 22 (permalink) Old 29th January 2016, 20:03
 
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Thank you for your help, it is much appreciated.
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post #19 of 22 (permalink) Old 29th January 2016, 22:31
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Thank you for your help, it is much appreciated.
You're welcome, good luck.
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post #20 of 22 (permalink) Old 3rd February 2016, 18:09
 
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When splicing the loom, where is best to splice the loom. I plan on using scotch lock connectors and want to make sure I connect in the right place before it splits.

I cant manage to get the photo onto this thread that I have circled in red where I plan to cut in but it is the upper vertical part.

does the loom come from the top of the car down or up from the arch and split?
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