interior lights dont turn off
04-04-21 | 08:22 AM
#16
Driver School Candidate
Joined: Apr 2021
Posts: 1
Likes: 0
From: VA
Had same problem
For anyone going thru this there is quite a bit to the interior wiring.
The problem is the Body ECU manipulates the ground wire for the interior lighting circuits. Many of the lamp's ground wires are spliced into the same common ground wire so if there is a short to frame ground in any in the ground wires in any of the lamps in question it will bypass the body ECU and keep all lights lit in the circuit.
How I would start:
Step 1: Confirm Body ECU recognizes all doors closed by info in dash cluster.
Step 2: Verify front overhead light and/or rear overhead light turn off/on properly when door closed/opened and if not see if position switch isn't shorted by manually turning lights on/off thus confirming a failed switch isn't completing the ground for all other lights in the circuit.
Step 3: List all lights that are failing to turn off,
Step 4: Attempt to figure out which component/wire/junction is shorting to frame ground and keeping all lights lit in affected circuit.
Hopefully this can be done without tearing out the interior chasing wires but would be helpful to know if any of the interior lights are turning off properly when doors are closed and narrow it down. Bad Body ECU with interior light circuit failure is another possibilty I should add.
The problem is the Body ECU manipulates the ground wire for the interior lighting circuits. Many of the lamp's ground wires are spliced into the same common ground wire so if there is a short to frame ground in any in the ground wires in any of the lamps in question it will bypass the body ECU and keep all lights lit in the circuit.
How I would start:
Step 1: Confirm Body ECU recognizes all doors closed by info in dash cluster.
Step 2: Verify front overhead light and/or rear overhead light turn off/on properly when door closed/opened and if not see if position switch isn't shorted by manually turning lights on/off thus confirming a failed switch isn't completing the ground for all other lights in the circuit.
Step 3: List all lights that are failing to turn off,
Step 4: Attempt to figure out which component/wire/junction is shorting to frame ground and keeping all lights lit in affected circuit.
Hopefully this can be done without tearing out the interior chasing wires but would be helpful to know if any of the interior lights are turning off properly when doors are closed and narrow it down. Bad Body ECU with interior light circuit failure is another possibilty I should add.
Have you disconnected your battery for any reason? When you do that you will have to recenter the windows and sunroof by rolling then all the way down them back up one at a time. This could solve it. If that doesn't work disconnect the battery for 30 min, recenter everything and try that. This happens to me often and thats the only thing that's seemed to work. On mine both dome lights are affected. They stay on but flicker a bit
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fred9xx (11-04-22)
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