Factory fit towbar

eribaMotters

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I think I'm about to have a run-in with Audi UK. I have a factory fit towbar and electrics which states:-
[... allows continual use of electrical devices in the trailer/caravan whilst driving...]
When looking at ordering I confirmed with supplying dealer and Audi Customer Services that this means the fridge electrics. I was told yes. I believe the only electrics legally allowed to run in the van whilst towing are the fridge and battery charging. No power can go to internal lights and any outside/awning light is also starved of power.
Following a tow last week I noticed the fridge was warm. I suspected no feed through the towbar electrics. Audi Liverpool have had the car all day and say it's fine. Asked specifically about feed through pin 10 they said it had not been individually tested as they don't do it that way. I was annoyed as this was what I had booked it in for. I was then told they had spoken to a towbar specialist and informed English law does not allow powering of the fridge. I kept calm, I didn't tell them this was a load of crap.
Does anybody out there have the factory fit bar and electrics and can confirm one way or the other if feed goes to the caravan fridge. This is not a simple thing to test as you need to induce a load across terminals 10 and 11, which I tried, but this shows up as a fault due to the canbus set-up.

Oh the next thing beggers belief. I asked about the fuse location for the electrics as it's not in the owners manual. It is behind, not inside the glovebox. You need to remove the gloxebox and MMI unit to access them.

Colin
 
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I think I'm about to have a run-in with Audi UK. I have a factory fit towbar and electrics which states:-
[... allows continual use of electrical devices in the trailer/caravan whilst driving...]
When looking at ordering I confirmed with supplying dealer and Audi Customer Services that this means the fridge electrics. I was told yes. I believe the only electrics legally allowed to run in the van whilst towing are the fridge and battery charging. No power can go to internal lights and any outside/awning light is also starved of power.
Following a tow last week I noticed the fridge was warm. I suspected no feed through the towbar electrics. Audi Liverpool have had the car all day and say it's fine. Asked specifically about feed through pin 10 they said it had not been individually tested as they don't do it that way. I was annoyed as this was what I had booked it in for. I was then told they had spoken to a towbar specialist and informed English law does not allow powering of the fridge. I kept calm, I didn't tell them this was a load of ****.
Does anybody out there have the factory fit bar and electrics and can confirm one way or the other if feed goes to the caravan fridge. This is not a simple thing to test as you need to induce a load across terminals 10 and 11, which I tried, but this shows up as a fault due to the canbus set-up.

Oh the next thing beggers belief. I asked about the fuse location for the electrics as it's not in the owners manual. It is behind, not inside the glovebox. You need to remove the gloxebox and MMI unit to access them.

Colin
Cannot help with the TB stuff but the fuse box is accessible via the access panel to the rear of the glovebox. There is no need to actually remove anything other than this cover and the procedure is detailed within your manual.

Audi A3 8V 2013 2018 fuse box location interior left side 300x179
 
That's what I thought, but no fuses are identified in the handbook and Audi Liverpool say there a 4 behind the glovebox, hence that is why it has to be removed. It makes no sense.
 
That's what I thought, but no fuses are identified in the handbook and Audi Liverpool say there a 4 behind the glovebox, hence that is why it has to be removed. It makes no sense.
I remove these glove boxes every day, never seen any hidden fuses.
 
I've got a factory bar on the SQ5, it wasn't fully wired from the factory but dealer arranged it FOC as part of the sale.
Your dealer is talking absolute rubbish about the legalities of this, the car charges the caravan battery and powers the fridge when towing. The caravan is fitted with a habitation relay which switches off all the other power when it's hooked up to the car.
 
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I think I'm about to have a run-in with Audi UK. I have a factory fit towbar and electrics which states:-
[... allows continual use of electrical devices in the trailer/caravan whilst driving...]
When looking at ordering I confirmed with supplying dealer and Audi Customer Services that this means the fridge electrics. I was told yes. I believe the only electrics legally allowed to run in the van whilst towing are the fridge and battery charging. No power can go to internal lights and any outside/awning light is also starved of power.
Following a tow last week I noticed the fridge was warm. I suspected no feed through the towbar electrics. Audi Liverpool have had the car all day and say it's fine. Asked specifically about feed through pin 10 they said it had not been individually tested as they don't do it that way. I was annoyed as this was what I had booked it in for. I was then told they had spoken to a towbar specialist and informed English law does not allow powering of the fridge. I kept calm, I didn't tell them this was a load of ****.
Does anybody out there have the factory fit bar and electrics and can confirm one way or the other if feed goes to the caravan fridge. This is not a simple thing to test as you need to induce a load across terminals 10 and 11, which I tried, but this shows up as a fault due to the canbus set-up.

Oh the next thing beggers belief. I asked about the fuse location for the electrics as it's not in the owners manual. It is behind, not inside the glovebox. You need to remove the gloxebox and MMI unit to access them.

Colin
@eribaMotters - Apparently factory fit tow vars from BMW have the same issues with the electrics as you are having
I the majority of cases these have rectified FOC by the BMW dealers

I know this may not help but at least it would appear your not alone
 
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Audi Nottingham changed my electrics in my old 8V in this respect, and Audi Derby agreed with my current car as well, though I've never actually tested my current car so I don't know if they followed through with their promise or not. I need to get around to testing it (though I don't have the testing kit myself) before the warranty expires...
 
Just collected the car. After 1 1/2 days they finally realised I was correct and power was not getting through. I am guessing they had been confused by the canbus system not allowing you to induce a specific load across a couple of terminals as the caravan plug had to be in place with all pins located. They accessed the "recognition unit" in boot behind panel on lhs, which I am told replaces the old split relay charging set up. I'm assured it now works. I hope it does, as the first time I'll know one way or the other is when I'll be 500 miles from home in France with a fridge full of food and my beers better still be cold.

Colin
 
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Caravan fridges are not very effective on 12v. If you hooked up to the vn and ran it for a couple of hours you would then start to see a difference. the best test is running it on mains to get it down to temperature prior to leaving. When you get to destination if it's still cold you know all is well.

Colin
 
Aah, I see the problem, Colin.....as I’ve never owned a caravan, thanks for the explanation.
 
Stick a multi meter on the caravan battery and then get someone else to start the car up, you'll hear the habitation relay click and, if it's been wired properly, you should then see the meter readings start to go up as the car charges the caravan battery.
 
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I wish it was that simple. I have a 1017 Hymer Eriba van with a Dometic 5330 fridge. The way these are wired up means the fridge light is on even when the caravan battery 12v circuit is turned off, mains is off and it's not attached to car electrics [that work] as it has a separate 12v live feed.
I worked out this afternoon if I break into the caravans transformer/charger unit I should be able to pick up the feed that should be there from the car.

Colin
 
Coincidentally I've got a Hymer as well, a 545 luxusline - with a dometic fridge!

If it's still getting power from the caravan battery when the 12v isolator is flipped off (not 100% certain but don't think mine does) I think you'll be fine so long as the car is charging the van battery?
 
Sorry, typo should have been 2017 not 1017. I managed to get meter readings directly off the contacts in the booster/transformer unit and all looks good.
Wired up to car, engine running, 14.8v showing. Flick the switch on the fridge to 12v supply and drops to 12.6v. My beers will stay cold ready for arrival.

Colin
 

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