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Discussion Starter #1
I have the factory installed Towing Package. The trailer electric plug is prewired and located behind a small plastic plate next to the hitch. My dealer did not install the socket for the trailer plug.

I installed the socket (it's a simple plug and play installation) today; but the voltage at the pins is 1.35 volts, as opposed to 12-13 volts as needed for the trailer running lights, brakes and turn signals.

If I turn everything off, the voltage is zero; but when turning on the lights and flashers, there's a steady (not pulsing) 1.35 volts on the three powered pins.

Does this thing need to be coded by the dealer? This is not connections for a brake controller - just simple trailer lighting.

I do have access to a VCDS/VAG-COM, but not sure how to change the codes, if at all.

Thoughts?
 

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You may find the voltage supply used is a duty cycle so you will not receive standard 12 volts.
 

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Discussion Starter #5
You may find the voltage supply used is a duty cycle so you will not receive standard 12 volts.
Unfortunately, it takes 12 volts to light the trailer lights.

I have an email in to my dealer's Service Manager to see what needs to be done.

Thanks for your feedback.
 
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