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01-28-2014, 05:29 PM
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#1
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2 Rivet Member
2014 16' Sport
Chicago
, Illinois
Join Date: Jan 2014
Posts: 52
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Brake control necessary for a 2013 Volvo XC70?
Our new Volvo will be towing our new 16' AS Sport. We had the tow package added at the Volvo factory when we picked it up in Sweden, which includes the hitch and 7-pin connector. According to Volvo owners manual, we have DSTC with TSA but seems that the TSA trailer assist only activates when the DSTC senses issues with braking. We can't get a straight answer from our Volvo dealer if we need the added brake control like Prodigy RF brake control. Our AS dealer didn't know either. Any assistance would be greatly appreciated.
We towed the AS home on Saturday without issue but don't know how safe it is to operate without the added brake control.
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01-28-2014, 06:12 PM
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#2
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Rivet Master
2012 30' International
1997 25' Safari
1967 20' Globetrotter
Burlington
, Ontario
Join Date: Jul 2009
Posts: 1,499
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Hi John. You need a brake controller and a weight distribution hitch regardless of what ever all those acronyms mean. There is a new saying, " When in America, do as the Americans do". We have a similar saying in Canada, especially in Quebec. You also need some additional mirrors so you have a fighting chance of seeing your neighbours. That is one nice Airstream you have. Don't let anybody tell you that is subject to depreciation. Jim
__________________
Jim
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01-28-2014, 06:33 PM
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#3
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Rivet Master
2000 19' Bambi
mt. Prospect
, Illinois
Join Date: Oct 2006
Posts: 829
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You could test the 7 pin connector with a test light or voltmeter. From the wiring diagram, locate the pin for the brake controller and check to see if there is current when someone steps on the brake pedal. That will tell you if you have working brakes. No current, no brakes. However, the TSA must use the brake circuit to engage the brakes to react to sway that is detected. I'd think that you'd need a brake controller for normal braking, and the TSA may engage independently when triggered. The TSA must have some sort of modulation, though. It can't be just on or off, or it could lock up the trailer brakes when it engages. Interesting problem.
If you want some help, PM me - I'm in the Chicago area and wouldn't mind looking at it.
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01-28-2014, 06:58 PM
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#4
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2 Rivet Member
Currently Looking...
Marine city
, Michigan
Join Date: May 2013
Posts: 44
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Most new cars have trailer sway control built into the electronic stability control system. If they sense the trailer is pushing the car back and forth they will actuate the cars brakes individually so as to damp the sway. They don't do anything to the trailer's brakes.
You need to add a brake controller to actuate the trailer brakes.
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01-28-2014, 07:44 PM
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#5
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Retired.
Currently Looking...
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, At Large
Join Date: Jun 2003
Posts: 21,276
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Quote:
Originally Posted by Mcdenny
Most new cars have trailer sway control built into the electronic stability control system.
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Which cars are those? Do you have any links so we can read about this?
The only thing I have ever seen in writing about built in sway control has been for Ford trucks, and what it says in that manual is if you get a "sway" alert, you need to make corrections to the trailer, possibly even installing an antisway bar, to safely continue to tow the trailer.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
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01-28-2014, 08:25 PM
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#6
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Rivet Master
2012 27' Flying Cloud
W
, New England
Join Date: Oct 2012
Posts: 7,402
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My Chevy Truck (2013 Silverado 2500 Duramax) has it too. Don't know about others...
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01-29-2014, 07:11 AM
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#7
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2 Rivet Member
2014 16' Sport
Chicago
, Illinois
Join Date: Jan 2014
Posts: 52
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Thanks for the input. We've opted for the Prodigy RF brake control and ordered it from etrailer. Think that this will do the trick.
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01-29-2014, 08:32 AM
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#8
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2 Rivet Member
Currently Looking...
Marine city
, Michigan
Join Date: May 2013
Posts: 44
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Quote:
Originally Posted by overlander63
Which cars are those? Do you have any links so we can read about this?
The only thing I have ever seen in writing about built in sway control has been for Ford trucks, and what it says in that manual is if you get a "sway" alert, you need to make corrections to the trailer, possibly even installing an antisway bar, to safely continue to tow the trailer.
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I think most all new(ish) vehicles have this. For sure Jeep Grand Cherokee and Ford Escape.
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01-29-2014, 10:52 AM
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#9
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Retired.
Currently Looking...
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, At Large
Join Date: Jun 2003
Posts: 21,276
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Quote:
Originally Posted by Mcdenny
I think most all new(ish) vehicles have this. For sure Jeep Grand Cherokee and Ford Escape.
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They sure don't seem to be making it well known. To me, it would be a big selling point of a new tow vehicle, but every search comes up with virtually nothing.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
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01-29-2014, 11:03 AM
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#10
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Rivet Master
2009 23' FB Flying Cloud
Canmore
, Alberta
Join Date: Nov 2013
Posts: 1,762
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Here's a youtube video discussing this (albeit briefly) in the GM trucks:
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01-29-2014, 11:26 AM
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#11
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Rivet Master
Currently Looking...
Vancouver
, British Columbia
Join Date: Oct 2012
Posts: 4,579
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My last three BMW vehicles have had Trailer Stability Control, as BMW calls it, integrated into the vehicle. It was developed by Bosch with BMW. Bosch is also supplying systems to Ford, I saw an announcement about the F150 that referenced the Bosch system. The systems I have had sense vehicle yaw and compare it to the steering angle sensor to see if the vehicle is yawing more than it should, then apply vehicle brakes (only) and reduce engine power to restore stability. The second generation GM system now applies trailer brakes as well as vehicle brakes, before reducing engine power. This seems quite a step forward to me. SAE published a paper on the relative benefits of vehicle braking, automatic trailer braking, and combination braking, in handling unintended trailer sway. I don't have a copy but some posters might.
Perhaps worth reinforcing that these systems combat unintended sway, they don't prevent it. Proper hitch and trailer setup is as important as ever; these are more akin to ABS braking systems in that they get you out of trouble and situations that with careful preparation you may never get into.
I towed with two separate BMWs (X5 and X3) with this system and never saw the Dynamic Stability Control (DSC) light come on due to trailer sway. That same light came on when the traction control intervened, or when the DSC system intervened on snowy roads, so I suspect that it would have lit up when the TSC activated if it had done so. I think the system was sitting there in the background just in case.
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02-03-2014, 05:19 AM
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#13
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2 Rivet Member
2014 16' Sport
Chicago
, Illinois
Join Date: Jan 2014
Posts: 52
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Well we attempted to install the Prodigy RF brake control yesterday that we got a great deal from ETrailer. Mounted it to the right side of trailer frame. Was afraid to drill in left hand side due to wiring running through there. Mounting was simple. Should have known that the rest of the process would not be so easy.
We can't seem to pair the handheld device with the controller. Handheld won't get past n.c. Following pairing instructions to the letter. Will call prodigy tech support later today. Not sure if it's the prodigy itself or wiring issue on Volvo or Airstream. Pretty frustrating however. Glad that we have time before the season begins to get this fixed.
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02-03-2014, 08:48 AM
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#14
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Rivet Master
1966 26' Overlander
Woodstock
, Georgia
Join Date: Feb 2002
Posts: 8,525
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I am looking at a 2007 Volvo XC90. Did ou have to get the Volvo wiring harness to install the prodigy in the vehicle?
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02-03-2014, 08:51 AM
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#15
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2 Rivet Member
2014 16' Sport
Chicago
, Illinois
Join Date: Jan 2014
Posts: 52
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We had the Volvo factory in Gothenburg install the receiver and wiring as part of our overseas delivery program. Not sure if they set up everything correctly as we are having issues pairing our Prodigy RF control.
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02-03-2014, 08:57 AM
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#16
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2 Rivet Member
2014 16' Sport
Chicago
, Illinois
Join Date: Jan 2014
Posts: 52
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Quote:
Originally Posted by robert claus
You could test the 7 pin connector with a test light or voltmeter. From the wiring diagram, locate the pin for the brake controller and check to see if there is current when someone steps on the brake pedal. That will tell you if you have working brakes. No current, no brakes. However, the TSA must use the brake circuit to engage the brakes to react to sway that is detected. I'd think that you'd need a brake controller for normal braking, and the TSA may engage independently when triggered. The TSA must have some sort of modulation, though. It can't be just on or off, or it could lock up the trailer brakes when it engages. Interesting problem.
If you want some help, PM me - I'm in the Chicago area and wouldn't mind looking at it.
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We may need to take you up on your offer of assistance if we can't figure this thing out
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02-03-2014, 08:57 AM
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#17
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Rivet Master
1966 26' Overlander
Woodstock
, Georgia
Join Date: Feb 2002
Posts: 8,525
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Nice! I used to handle that delivery set up for a Volvo dealer. Sold a lot of cars on that program.
By the way there are some great posts about the towing situation on Volvo forums..Google it
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02-05-2014, 05:18 PM
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#18
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2 Rivet Member
2014 16' Sport
Chicago
, Illinois
Join Date: Jan 2014
Posts: 52
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Our local Volvo dealer wasn't much help this afternoon, other than determining that the Swedes who installed the hitch receiver and 4/7-pin wiring didn't do something right. They tested all the pins, to find that there was no (4) Black 12-volt battery power and nothing on the (2) Blue Brake Controller Output. The other pins tested fine. Any ideas?
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02-06-2014, 02:25 PM
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#19
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Rivet Master
1995 30' Excella
Bowie
, Maryland
Join Date: Apr 2005
Posts: 2,345
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Quote:
Originally Posted by john4170
Our local Volvo dealer wasn't much help this afternoon, other than determining that the Swedes who installed the hitch receiver and 4/7-pin wiring didn't do something right. They tested all the pins, to find that there was no (4) Black 12-volt battery power and nothing on the (2) Blue Brake Controller Output. The other pins tested fine. Any ideas?
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Did they test it with the ignition on? Many vehicles will only power the black battery power circuit while the ignition is on, so you don't run down the vehicle's battery while dry camping in the trailer.
The brake thing should work, though, unless you have no brake controller. I'm guessing you don't - it should have a setting somewhere that would allow you to adjust the sensitivity (voltage), since every trailer is different. You probably need to add a Prodigy or something.
__________________
1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel
Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab
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02-11-2014, 03:33 PM
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#20
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2 Rivet Member
2014 16' Sport
Chicago
, Illinois
Join Date: Jan 2014
Posts: 52
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Well good news. Can report that our Volvo and AS Sport are both ready to go. After numerous calls to Prodigy tech support, etrailer and our XC70 spending 3 nights at the dealer, our brake control is finally paired. Anyone else experiencing similar issues with a Volvo should make certain that their dealer installs the latest and greatest trailer module software, as that was our issue. This experience nearly took all of the fun from the initial experience, but figure it must all be upstream from here on out. Can't wait to see what adventures await!
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