Curt 4-Way Not Operating Left Turn Signal On 2014 Audi Q5

Question:

2014 Audi Q5, hooked up the 3 leads as mentioned in the tutorial but the left blinker does not work at all and the left tail light is on all the time, appears to be a brake light. All other lights work fine. Trailer is new so works perfect on other vehicles. Any advice? Thanks

asked by: Tim

Expert Reply:

You are going to want to start by checking inside the connectors on the Curt T-Connector Vehicle Wiring Harness # C56404 to verify if any of the pins were bent or pushed out on the connectors. You can also use a Test Light # PTW2993 to test both the power going into the power converter from the different functions and verify the power coming out of the converter as well to verify if it is damaged and would be able to be replaced under the manufactures warranty.

expert reply by: Bud M

Tim

5/2/2024

The harness I was sent wasn't a plug in type, basically showed me the battery connection, tail lights, and turn signals, all being hard wired into a cluster in the back.

Bud M.

5/2/2024

@Tim Okay, you can still perform the test using the Test Light # PTW2993 to verify the power going into an out of the converter box for each circuit.

Tim

5/2/2024

@BudM thanks Bud, upon testing things again, I discovered that with everything hooked up as described, and the vehicle off, that I have 12 volts coming out of the 4 way flat yellow lead. Could the module be bad?