2001 trans am DLR/ parking light problem
When your headlights come on, a signal is sent to the DRL module to turn off the DRL lights. (That is the turning off you are seeing.)
At the same time, the headlight switch should directly power the running/parking light filament.
So, I would think: (to check out)
- Your bulb is bad (try stitching left to right and see if the problem moves)
- Your socket is not wired correctly or you have a socket problem
- You have a wiring problem on the running/parking light circuit


