Volvo Community Forum. The Forums of the Volvo Owners Club

Forum Rules Volvo Owners Club About VOC Volvo Gallery Links Volvo History Volvo Press
Go Back   Volvo Owners Club Forum > "Technical Topics" > Towing and Caravan Topics


Towing and Caravan Topics A forum for all towing/caravanning related topics

  • VOC Members: There is no login facility using your VOC membership number or the details from page 3 of the club magazine. You need to register in the normal way
  • AOL Customers: Make sure you check the 'Remember me' check box otherwise the AOL system may log you out during the session. This is a known issue with AOL.
  • AOL, Yahoo and users. Forum owners such as us are finding that AOL, Yahoo and are blocking a lot of email generated from forums. This may mean your registration activation and other emails will not get to you, or they may appear in your spam mailbox

Thread Informations

V50 Trailer Control Module

Views : 335

Replies : 3

Users Viewing This Thread :  

Thread Tools Display Modes
Old Nov 4th, 2021, 15:12   #1
New Member

Last Online: Nov 6th, 2021 18:08
Join Date: Oct 2021
Location: Louth
Default V50 Trailer Control Module

Hi all, tried asking this in the V50 section but no luck. Anyone know?

I've just fitted to my 2009 V50 a second hand towbar which came with a used volvo trailer module. This is currently plugged in and powered up but not doing anything as the car presumably isn't talking to it. Does anyone know for definite if this module can be reprogrammed and used? Local dealer wasn't sure but thought if it hadn't been de-registered from its original car, they wouldn't be able to code it to a new one. Does that sound right? If so would seem to make all the second hand units for sale on the internet worthless! I'm guessing its the CEM that actually gets reprogrammed, to look for the trailer module with the correct serial number?
Towbar came from a scrap yard so doubt the original car still exists!
rjdavey68 is offline   Reply With Quote
Old Nov 4th, 2021, 20:20   #2
Premier Member

Last Online: Today 09:28
Join Date: Nov 2013
Location: Newark

I am sure you are right. The basic function ie lights should work straight away and you only get the full functionality when you have had the software downloaded at a dealer.

There was a thread on here a while back that said that you had to deregister the module from the donor before you could use it on another vehicle.

You have made a good saving on the towbar so bite the bullet and buy a genuine Volvo module to get the full functionality.
XC60 2013 D5 215 SE Lux Nav geartronic
Whyman is offline   Reply With Quote
Old Nov 6th, 2021, 02:39   #3
New Member

Last Online: Nov 6th, 2021 18:08
Join Date: Oct 2021
Location: Louth

I've got no functionality at all atm, let alone the extra software stuff.
I can see the TRM in vida fine, but as its not in the car's configuration table nothing doing.
Maybe if a car is already configured with a tow module, which subsequently goes faulty, then a second hand spare might work I don't know. Even then don't know how you get around the serial number being different.
Was hoping not to have to stump up for a new module plus software and dealer time as the cars now quite old and only worth about 500! Looking more like a cheap bypass relay, which is a shame.
rjdavey68 is offline   Reply With Quote
Old Nov 22nd, 2021, 18:26   #4
Genuine Parts Mafia
Tannaton's Avatar

Last Online: Today 13:08
Join Date: Aug 2014
Location: Beverley, East Yorks

The trailer modules are not coded to the car but do need a software update to recognise them - until the software is loaded, nothing usually works. This means you have to go to a dealer or a good indie will licenses VIDA. Whilst VIDA might see the TRM as it's on the canbus, the CEM needs software to talk to it.

You can buy generic trailer modules that don't need programming or software but they won't have all of the functions such as bulb failure warning, parking sensor defeat or fog light control. Most towbar outlets will sell them. Or you could just buy a relay and splice into the wires - will work just as well....
2015 XC60 D5 SE LUX, 2012 Ford Ranger XL SC, 1977 Triumph Spitfire 1500
Tannaton is offline   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT +1. The time now is 14:44.

Powered by vBulletin
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.