Two questions.......is this both front and rear parking lights?
Also, is it both sides....or just one?
The head light switch and multi function switch on the column, send their signals to the instrument cluster. The instrument cluster acts as a body computer or CTM.
The cluster then sends a signal to the front control module to turn on the relay. Since the lights go out when the FCM is unplugged it is safe to assume that it is being told to turn the lights on by the cluster.
So, now we are either down to a problem with the instrument cluster itself, or the messages it is getting from the switches.
I see you changed the multi function switch, but no mention of the headlight switch.
You might want to unplug the headlamp switch and see if the lights go out, if not it appears the problem is in the cluster.
Alright, I think you need to sit down and sort out what is what, here. You are now saying that you were wrong about the FCM........and here are 2 statements that contradict each other.
"If I put on my hi-beams the taillights will go out also"
" when I put on the hi-beams the taillights don't go out"
We will only go in circles unless you can get the facts straight because not only are you wasting your time but mine as well.
Can I have you read back over the questions I have asked you.......make sure all the other answers are correct!!
Thanks, XXXXX XXXXX's just concentrate on why the park lights are staying on and leave everything else for a minute.
So, when you unplug the FCM, the park lights are still on?......Correct?