206 Zephyr front driver side park/running light stays on always even overnight keys out?

Have the turn signal stalk changed. It appears to be worn out. When the lighs are off and the key is off or out, there should be no power to a healthy switch.

I was just going to tell you to look for a Short, GREAT JOB finding it.

Replace the BCM.

park-run -tail
the most complex lights on car, huge number of lamps in side and outside. are ALL 20 dead ,side lamps. license, park, tail, dash , dash dim lights, ALL ?
check the fuses. first. always for ever and ever, check them first.
maked TAIL , even the front parks are run of TAIL. oddly.
parking lamps is the better term.
TAIL is 1929 word back when they had just 1 lamp... EEEEKKKSSS

Did you do some electrical work on the car?

drivers seat ? is there a console in the middle with park rev neutral stick?

no year compass stated, so will do 1st year.
USA/ Car?? (we are USA forum so answers default to bingo us)
engine runs ok, all else runs OK> just lamps problems?
Just is very important word in the electric world.
Drivers ok? too. (engine cranks, runs and stays running?) (turns on many meal all that)
gen1 is 2006 to 2016, later is GEN2.
ill pick first years.
seems headlights/binkers (turns sigs) are shorted together or parks.
Park/(aka, tails) may be in the mix.

1: fuses check ok
2: battery fully charged, reads 12.6v key off rested, and 13.3 to 15vdc running,
3: check for wiring damage behind lamps on the effected sides.
and for trailer hitch from H3LL hacks. there? looking is first.
collision damage by other owners, is possible (if 2nd owner you)
now electrics have a chance to perform. good power.
This system is all networked now.. needs to be understood
the first step now is to SCAN it. that's right, what if the communications bus, cant all talking between modules.
those lamps are all run by a computer under the hood
called TIPM , the module insides is called the "electronics module. EM"
it has 4 blinker wires as an output. (not shared a key fact for diagnoses)

you said driver side blinker (left works better)
drivers in UK are on right.
the left side front and rear. my guess , NO not rear)
if true the problem is there, left front blinker.
wire damage there, even the LAMP it self can short, (get new one?)
blinker,
damage at TIPM , can be possible look there yet.
its just a computer and has transistor drivers. to lamps
and if it told to do something, and is told correctly(scans)
then its bad or its output wires are shorted.
try a new lamp ?

Refr. page 50 in the SM ( MK jeep service manual, SM)
and 52.(turns)

the 4 head lamp wires(power) all are seperate at the EM
not parallel at all. independent, x4
and last the park lamps are independant on the EM
that means if the lamps are good and wires good then the EM
is faulting.
or its getting wrong commands, on the CAN-BUSS network
now you know how it works,
better is get the SM and read, it covers ALL this, in vivid details.

One of the door pin switches is faulty, Interior light must be staying on and draining the battery. If you don't see the dome light staying on possibly the trunk switch is bad.

MAKE SURE THE INDICATOR STOCK IS IN THE OFF POSITION WHEN YOU LEAVE THE VEHICLE AS THIS KEEPS THE PARKING LIGHTS ON IN THAT DIRECTION.GOOD LUCK.

What happens when you remove both switches, and wires? What happens when you use a jumper wire acros both wires, on both doors?