Brake Lights on Trailer Not Working With 2017 VW Golf SportWagen
Published 09/06/2019
Question:
You have answered to my earlier question regards the issue I am having with brake lights not working, can you tell me or have a diagram of what functions are carried over the wires on trailer side 4 pin connector Green - Right turn/stop White - Ground Yellow - Left turn/stop Brown - Taillight what about the vehicle side is this the same I can see 3 wires going to vehicle taillights turn Green wire turn yellow wire tail brown wire Do green and yellow wire carry STOP function with turn signal ? or do the brown wire carry taillights and stop function? Thanks
asked by: Paul
Expert Reply:
While we do not have a table, we do have some diagrams in the help articles I linked on trailer wiring and wiring troubleshooting which I recommend taking a look at. And even though your 2017 VW Golf SportWagen has brake lights and turn signals on the same circuit, a 4-way with a powered modulite can still have issues.
I recommend first start by checking your grounds to ensure they are securely attached to a bare metal surface free from any type of corrosion, dirt or paint; a bad ground may cause this issue because it would be unable to handle the consistent voltage output on your brakes as opposed to the intermittent output on a turn signal. It could be that when you went away for a month the connection somehow became loose or got impeded.
The other thing I recommend taking a look at, if your vehicle's brake lights don't work at all (as opposed to just when you have a trailer connected) is the fuse for your brakes, as that may have blown.
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Paul
9/6/2019
You have answered to my earlier question regards the issue I am having with brake lights not working, can you tell me or have a diagram of what functions are carried over the wires on trailer side 4 pin connector Green - Right turn/stop White - Ground Yellow - Left turn/stop Brown - Taillight what about the vehicle side is this the same I can see 3 wires going to vehicle taillights turn Green wire turn yellow wire tail brown wire Do green and yellow wire carry STOP function with turn signal ? or do the brown wire carry taillights and stop function? Thanks