s80 II fitting towbar

norwek · May 21st, 2018, 15:49

hi all. i am planning to fit a towbar to my s80. I need some advice about electric conection. I was looking for manufacture towbar connection plug in the boot but I couldnt find it. do i have to connect straight into cables by lights? do I need a bypass ?( I will only use a towbar for bike carrier platform) does anybody know which colour of cable is for what? thanks for any help

Waynedance · May 21st, 2018, 21:14

https://rover.ebay.com/rover/0/0/0?m...2F172490046271

I fitted this to mine, was plug and play mainly. The plugs were already in the boot on the near side.

apersson850 · May 22nd, 2018, 19:13

Today's cars don't have towbar connections already prepared. They have a connection for a computer module, in Volvo's case called a TRailer Module. It's this TRM that then connects to the trailer, or whatever it is.

Direct connections to the different lights will confuse the monitoring the car has for the different lights.

norwek · May 24th, 2018, 12:19

I have located the manufacturer connectors in the boot. one is grey with one red cable and secondis green with five cables. could someone tell me which cable is L and R indicator, stop light, etc. I have a bypass TEB7AS. i hope this will work

apersson850 · May 24th, 2018, 16:34

As I wrote above, it doesn't work like that any more.

The car is not designed to connect the trailer to the lights directly. You should use the TRailer Module, which interacts with the car's electric system the proper way, and creates the signals you need for your trailer. The TRM gets information from the car's CANbus communication system about when to turn on turn indicators, fog light etc.

Connecting the way you are thinking about is a thing of the past. There's no place to connect to in the lamps (as there were in a Volvo 850), so you would have to tamper with the wiring to make a connection.
In my opinion, the kind of module you have acquired is a piece of crap.

GrantA · May 24th, 2018, 22:06

Quote:

Originally Posted by norwek

I have located the manufacturer connectors in the boot. one is grey with one red cable and secondis green with five cables. could someone tell me which cable is L and R indicator, stop light, etc. I have a bypass TEB7AS. i hope this will work

When I bought my Volvo in 2012 the towing electrics were via a bypass TEB7AS exactly the same as yours. There was a problem with the way it was wired to my Volvo in as much as the towing electrics were fitted with the tailgate open so power to the trailer brake lights were taken off the lower rear lights on the car which operate when the tailgate is open - shut the tailgate and the brake lights are powered from the lights on the tailgate itself so the brake lights on my trailer stopped working with the tailgate closed.

I ended up getting advice from a bloke called "Colin" via enquiries@indilec.com and he sent me a wiring diagram for my Volvo and I managed to access the correct wire to allow the brake lights on my trailer to operate correctly when the tailgate was closed. If you Google "TEB7AS" you will see loads of advice on how to fit the TEB7AS unit and if you email "Towsure" or another similar company I'm sure they will help with which wire to connect to where.

PS. The only thing that does not work is the park assist as it sees the trailer as an obstruction and has to be turned off when the trailer is hitched up. The TEB7AS module blips when the indicators are used so you know that the trailer indicator lights are working.

norwek · May 25th, 2018, 08:15

Quote:

Originally Posted by GrantA

When I bought my Volvo in 2012 the towing electrics were via a bypass TEB7AS exactly the same as yours. There was a problem with the way it was wired to my Volvo in as much as the towing electrics were fitted with the tailgate open so power to the trailer brake lights were taken off the lower rear lights on the car which operate when the tailgate is open - shut the tailgate and the brake lights are powered from the lights on the tailgate itself so the brake lights on my trailer stopped working with the tailgate closed.

I ended up getting advice from a bloke called "Colin" via enquiries@indilec.com and he sent me a wiring diagram for my Volvo and I managed to access the correct wire to allow the brake lights on my trailer to operate correctly when the tailgate was closed. If you Google "TEB7AS" you will see loads of advice on how to fit the TEB7AS unit and if you email "Towsure" or another similar company I'm sure they will help with which wire to connect to where.

PS. The only thing that does not work is the park assist as it sees the trailer as an obstruction and has to be turned off when the trailer is hitched up. The TEB7AS module blips when the indicators are used so you know that the trailer indicator lights are working.

thanks. will try to contact them

V70Driver76 · May 26th, 2018, 07:34

I have just instaaled tow bar electrics on my V70. After messing around with a dedicated kit, I sent it back for a refund and put a genuine Volvo one on from FRF. Cheaper than aftermarket at about £100 including deliver but everything works! It does need to be coded in at a cost of about £80 by Volvo (software download).

Good luck but if you don’t get it sorted, this is my recommendation.

Waynedance · May 26th, 2018, 09:11

No coding on the kit I used, plug and play mostly just one wire to the fog light with connectors supplied.

apersson850 · May 27th, 2018, 20:50

All your comments confirm my opinion. Throw the bypass thingy where it belongs, in the dustbin, and get the real thing.

May 21st, 2018, 15:49	#1
norwek New Member Last Online: Dec 18th, 2019 13:11 Join Date: May 2018 Location: Wrexham	s80 II fitting towbar hi all. i am planning to fit a towbar to my s80. I need some advice about electric conection. I was looking for manufacture towbar connection plug in the boot but I couldnt find it. do i have to connect straight into cables by lights? do I need a bypass ?( I will only use a towbar for bike carrier platform) does anybody know which colour of cable is for what? thanks for any help

May 21st, 2018, 21:14	#2
Waynedance Senior Member Last Online: Mar 15th, 2021 22:31 Join Date: Jun 2017 Location: Nuneaton	https://rover.ebay.com/rover/0/0/0?m...2F172490046271 I fitted this to mine, was plug and play mainly. The plugs were already in the boot on the near side. __________________ S80 P3 SE LUX D5 Auto

May 26th, 2018, 09:11	#9
Waynedance Senior Member Last Online: Mar 15th, 2021 22:31 Join Date: Jun 2017 Location: Nuneaton	No coding on the kit I used, plug and play mostly just one wire to the fog light with connectors supplied. __________________ S80 P3 SE LUX D5 Auto

May 22nd, 2018, 19:13	#3
apersson850 Premier Member Last Online: Apr 17th, 2024 21:40 Join Date: Jul 2011 Location: Traryd View Photos By: apersson850	Today's cars don't have towbar connections already prepared. They have a connection for a computer module, in Volvo's case called a TRailer Module. It's this TRM that then connects to the trailer, or whatever it is. Direct connections to the different lights will confuse the monitoring the car has for the different lights.

May 24th, 2018, 16:34	#5
apersson850 Premier Member Last Online: Apr 17th, 2024 21:40 Join Date: Jul 2011 Location: Traryd View Photos By: apersson850	As I wrote above, it doesn't work like that any more. The car is not designed to connect the trailer to the lights directly. You should use the TRailer Module, which interacts with the car's electric system the proper way, and creates the signals you need for your trailer. The TRM gets information from the car's CANbus communication system about when to turn on turn indicators, fog light etc. Connecting the way you are thinking about is a thing of the past. There's no place to connect to in the lamps (as there were in a Volvo 850), so you would have to tamper with the wiring to make a connection. In my opinion, the kind of module you have acquired is a piece of crap.

May 26th, 2018, 07:34	#8
V70Driver76 Junior Member Last Online: May 23rd, 2021 14:47 Join Date: Jul 2017 Location: Grantham	I have just instaaled tow bar electrics on my V70. After messing around with a dedicated kit, I sent it back for a refund and put a genuine Volvo one on from FRF. Cheaper than aftermarket at about £100 including deliver but everything works! It does need to be coded in at a cost of about £80 by Volvo (software download). Good luck but if you don’t get it sorted, this is my recommendation.

May 27th, 2018, 20:50	#10
apersson850 Premier Member Last Online: Apr 17th, 2024 21:40 Join Date: Jul 2011 Location: Traryd View Photos By: apersson850	All your comments confirm my opinion. Throw the bypass thingy where it belongs, in the dustbin, and get the real thing.

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