Towbar wiring

Towbar wiring

Postby jim80h on Mon Sep 26, 2016 5:48 pm

Hi All,
Im getting a MQ GLX+, and was looking at towbars. My dealer quoted nearly $1000 to fit factory. I have seen a couple of aftermarket ones that come in around $500 with wiring harness. It mentioned that I require a ecu as well? Can someone please explain why?. Im not young and tech savvy, so please help. :?: :?: :?:
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Re: Towbar wiring

Postby coughy on Mon Sep 26, 2016 6:54 pm

the ecu is to protect the wire and system from the current draws from the lights as they use little tinny wire for the factory lights and the trailer would put to much load on the wiring and could blow the etacs that controls the cars features
so the ecu is a multi relay in the back of car and has a power from the battery to power it up to feed the trailer plug
well that is what i was told and thought
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Re: Towbar wiring

Postby aquagen on Mon Sep 26, 2016 7:03 pm

Iron man do a harness for the Mq. As far as I know Mitsubishi will not sell you a harness without a tow bar, comes in a kit. Self install is very easy. There is a taped up plug under the tray that the harness hooks into, and you need to fit an earth wire to the passenger footwell. All the other wiring from battery etc is already run.
When they say you need an ecu, it's already on the car, part of canbus system. Means you can't just tap into tail lights like the old days
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Re: Towbar wiring

Postby ROBTON on Sat Oct 01, 2016 7:15 pm

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Re: Towbar wiring

Postby Machine48 on Sat Oct 01, 2016 7:50 pm

I got a rear bar from protectorstore on ebay. Very nice.

For $629 delivered why pay $550 for an aftermarket towbar? ;)

Fitted it in 1/2 hr.

Don't expect any help if TNT damage it in transit though :x
Last edited by Machine48 on Sun Oct 02, 2016 7:26 am, edited 1 time in total.
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Re: Towbar wiring

Postby bobski on Sat Oct 01, 2016 8:05 pm

Yeah I got my Tag off ebay too for $530ish - only issue was the instructions were for a different vehicle - only one way to fit it though! All wiring included, easy enough to wire up, it has been fine (not that I tow anything other than a single axle box trailer...).
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Re: Towbar wiring

Postby Spaceman on Sun Mar 12, 2017 10:39 am

I'm buying a new MY17 and trading my MQ 15 model but club cabs having to buy auto due to bung knee. I planing to keep the towbar and wiring and install into the new ute. There should be no difference in the wiring but not sure. From what i can see the harness is in 3 parts. 1 from the battery, 2 connection in the passenger foot well and the rear harness under tray. Do in need to remove all 3 harnesses or just the one under the tray, does 1 and 2 come with the ute. They're all maked with the same date but A, B, C.. There is white plug under the tray with a dummy in it next to where you would plug in the trail harness, my mate GLS dual cab has plug in it but mine doesn't
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Re: Towbar wiring

Postby Spaceman on Wed Mar 15, 2017 7:16 pm

What do the relays do on the standard trailer wiring harness.
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Re: Towbar wiring

Postby jezza-au on Sun Apr 16, 2017 9:49 pm

Don't be daunted, it's not that hard to do and don't be swayed by the big brands - as long as it's rated to the ADRs as a block of steel to pull your shtuff. I bought a TAG / Mikano, service was good, one day order to pickup for the MQ GLS. < $150 should be a reasonable install price if you decide to have it done.
Decided to install myself, wiring is a splice in so no extra harnesses - instructions w/wiring photos here http://bit.ly/2oAqZnK

Best o luck mate,
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Re: Towbar wiring

Postby stubec16 on Fri Jun 02, 2017 4:13 pm

Hi all, I picked up a factory towbar and loom for my MQ GLS. I also grabbed a piece of loom out of the left footwell. I can't post photos so its about 25cm long with square plugs either end connected by an orange wire and one white wire coming off that goes to earth.

Mine has vacant plugs where that this goes between (in the passenger footwell). I can see a similar item in the ironman loom fitting instructions (posted above) although that one only shows the earth. What does this piece do? One assumes it takes power from somewhere and sends it down to the lights and adds an earth, but why?

Also spaceman talks about a loom near the battery? I didn't grab this. Do I need it? Where do I need to put it?

Thanks.
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Re: Towbar wiring

Postby jacm on Fri Jun 02, 2017 6:51 pm

Hi,

I just installed mine from Towbars Australia, it came with the wiring loom needed and coast around $650 delivered to Canberra. Fast and easy. It took around 3 hours (could have been quicker but its getting cold here!) but it all went in as per in the instructions. The wiring worked first time as well.

The towbar was the one with a factory rear step variety.

Cheers
John
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Re: Towbar wiring

Postby stubec16 on Fri Jun 02, 2017 7:37 pm

jacm wrote:Hi,

from Towbars Australia, it came with the wiring loom needed
John


John, is that type where you splice into the factory loom or was it plug and play? Was there anything that went in the left footwell or battery area? Thanks. Stu.
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Re: Towbar wiring

Postby jacm on Fri Jun 02, 2017 9:46 pm

Plug and play into the plug on the left hand side of tub underneath. 2 pieces of wiring was supplied. 1 that runs to the battery back to the plugs at the back with a couple of relays and a "double adapter" for the plugs, and (2) the 7 pin plug back to the double adapters. Unplug the original, plug in the new and run the wire to the battery, plug in the lead with the 7 pin plug on it. Just needed a tek screw for the earth wire and to hold the relays in place. Hopefully it makes sense but it was straight forward.

Cheers
John
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Re: Towbar wiring

Postby stubec16 on Mon Jun 05, 2017 11:54 am

Yes, well towbar fitted today (genuine second hand - see above). I am definitely missing one piece of the loom. There is a vacant plug attached to the loom near the LH headlight. As far as I can tell, it feeds 12V supply down the rest of the loom to the trailer harness. I ran a 12V bridge from the battery to the pink wire and it all worked - but it was far from a permanent fix.

I did get the piece that goes in the LH footwell as described in my previous post. Why Mitsi don't spend 3c fitting this I don't know.

Can anyone post what this genuine connection looks like and were it runs to please?
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Re: Towbar wiring

Postby ag9111 on Mon Jun 05, 2017 12:36 pm

If it's the same as the MN then it is just a fuse link between battery and wiring loom.
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