Either you have the brown and black wires mixed up (black ground / brown park lamp) or the daytime running lamp (DRL) module is faulty.
In theory, if the headlamps are turned on and you have power going to ground at that socket, it may be back-feeding through to the light and indicator. Check to make sure they are in the correct order.
Next, when the turn signal is turned on, there is a relay in the DRL that allows power to reach the signal. Once that switch is turned off, the relay should return to an open position which will allow the parking light to turn back on. (See pic below)
Check to make sure the wiring is correct, and you have a good ground.
Let me know what you find.
See pic below.
Image (Click to make bigger)
Sunday, February 11th, 2024 AT 4:58 PM