Trailer Adapter Plug

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Apr 17, 2022 | 03:03 PM

SQ8westcoast

Thread Starter

AudiWorld Senior Member

Joined: Apr 2021

Posts: 912

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From: Vancouver , BC Canada

Trailer Adapter Plug

just found a great adapter for my boat trailer .................https://www.reesetowpower.com/produc...er-7-to-5-flat

Apr 18, 2022 | 08:27 AM

BRITinUS

AudiWorld Member

Joined: Jun 2021

Posts: 273

Likes: 83

From: US Central South

Quote:

Originally Posted by SQ8westcoast

just found a great adapter for my boat trailer .................https://www.reesetowpower.com/produc...er-7-to-5-flat

I have not yet towed with the RS Q8, but have with my Q7. My experience with adapters that have integrated LED indicators to test the trailer lighting circuits was not good. Bottom line is they draw too little current for the vehicle to detect there is an electrical "load" connected to the socket, so the clever vehicle electronics do not send power to the socket and the LEDs do not light up. This leads you to believe there is a problem when in fact there may not be. Connect a real load (including a trailer with LED lights) and there is sufficient current draw for the vehicle to automatically enable the circuit and everything works!

I made a simple custom checker with light bulbs, see details here. If I remember correctly an indicator also comes on in the virtual cockpit showing there are trailer lights connected.

Apr 18, 2022 | 08:52 AM

SQ8westcoast

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Joined: Apr 2021

Posts: 912

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From: Vancouver , BC Canada

I'll check that out , thanks . I really didn't care about the LED I really liked the idea of the 12 V socket externally , the car is in getting coated and then over for some vinyl work to the splitter and fascia , I have to move my boat soon so will provide a full report .
Cheers !

Apr 19, 2022 | 08:05 PM

SQ8westcoast

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Joined: Apr 2021

Posts: 912

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From: Vancouver , BC Canada

The LED indicator lights work fine on the unit I purchased ,

Apr 21, 2022 | 04:36 AM

rdA4WtQ5

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Joined: May 2011

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From: Western Mass

On the one I have the test LED's work and still get a bulb out warning (and fault code) if the trailer is not also connected at the same time.

Apr 21, 2022 | 04:56 AM

BRITinUS

AudiWorld Member

Joined: Jun 2021

Posts: 273

Likes: 83

From: US Central South

Quote:

Originally Posted by rdA4WtQ5

On the one I have the test LED's work and still get a bulb out warning (and fault code) if the trailer is not also connected at the same time.

Yes indeed, it appears our vehicles need to see a significant electrical load before they declare everything is in order, often the tester does not fully confirm that. I guess the moral of the story is that if your tester indicates there is a fault, there may not be. The acid test is to connect the vehicle to a trailer with lights that are known to work, or make a custom setup as shown in the link below:

https://www.audiworld.com/forums/q7-.../#post25601369.