some where in its "ext_config.ini" you must set this to 0 if its 1
CAST_LIGHT=0
or this
RANGE=0
or post your ext_config.ini
there is also this to help you find out what CSP has guessed as lights for your car
https://github.com/ac-custom-shaders-patch/acc-extension-config/wiki/Cars-–-About-guessed-configs
Thank you so much for the answer, I found out that the light is linked to this:
[LIGHT_HEADLIGHT_0]
AFFECTS_TRACK=1
BOUND_EMISSIVE_MAX=500
BOUND_EXP=1
COLOR=200,180,120,0.1
DIFFUSE_CONCENTRATION=0.88
DIRECTION=0, 1.0, 10
EXTERIOR_ONLY=0
FADE_AT=450
FADE_SMOOTH=50
INTERIOR_ONLY=0
LOWBEAM_RANGE_MAX=150
LOWBEAM_RANGE_MULT=5.0
LOWBEAM_RANGE_ONCOMING_MULT=0.8
MIRROR=0.53
MIRROR_DIRECTION=0
POPUP_ENABLED=0
POSITION=0, 0.94, 1.7
RANGE=310
RANGE_GRADIENT_OFFSET=0
SECOND_SPOT=70
SECOND_SPOT_INTENSITY=0.27
SECOND_SPOT_RANGE=10
SECOND_SPOT_SHARPNESS=0.28
SECOND_SPOT_SKIP=0.3
SINGLE_FREQUENCY=0
SPECULAR_MULT=1
SPOT=58
SPOT_EDGE=0.02088, 0.01992, 0.018
SPOT_EDGE_SHARPNESS=50
SPOT_SHARPNESS=0
SPOT_UP=0.0499376, 10.998752, 0
which is used for the front headlights, so if I delete this, the "interior light" would go away along the headlights, I'll take right now a look for the guessed configs, thanks again. I can't post the whole ext_config since I'm editing it right now and there are some other mistakes to fix