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there are at least 3; 1 is using the dash light switch-turn all the way up;2 that show 4 lights on it-push it and it will turn them off-push it again and it will turn them on; three push on one end or the other end of the actual light.
There are a few possibilities. First, the Dome light usually has 3 settings on its own switch located in the Dome light case. One position is full OFF, another position is by Door opening, and the final position is FULL ON. If these settings do not help, then you must have a bad doorjam switch or a grounded wire. When the door switch is pushed in by the closing of the door, the plunger in the stem of the door switch is suppose to separate the wires. If the switch is cracked within the door frame opening, the wires may not separate and break the connection. You would need to remove the doorjam switch and BEFORE you removed the wires tape something to the wires to prevent losing the wiring loom in the frame of the body. Another potential reason for the Dome light staying ON is the headlight switch. Turning the light switch beyond the full dash brightness limit will MANUALLY turn on the Dome light. Check to see if the light switch is turned too far.
CHECK ALL THE LITTLE BUTTONS OR SWITCHES THAT THE DOOR HITS WHEN IT CLOSES THEY ARE USALY IN FRONT BY WHERE THE HINGES ARE OR NEAR THE BACK WHERE THE DOOR LATCHES YOU WILL NO CAUSE YOU CAN PUSH THEM IN WITH YOUR FINGER JUST LIKE A BUTTON PUSH ALL THEM IN ONE DOOR AT A TIME YOUR DOME LIGHT SHOULD GO OF WITH THE DOORS OPEN WHEN YOU PUSH THEM IN (ONE AT A TIME) AS EACH ONE YOU PUSH IN TURNS OFF THE DOME LIGHT OR THE BEEPING STOPS LIKE WHEN YOU LEAVE YOURE LIGHTS ON AND OPEN THE DOOR THIS SHOULD HELP YOU FIND THE FAULTY SWITCH THERE IS ONE FOR EACH DOOR
Next to the round exterior light switch is a switch that controls the brightness of the interior dome lights. You can push (detent) that button in and it will pop out to make it easier to brighten/dim those lights. The tricky part is that the switch for making the dome lights illuminate when you enter/exit the vehicle is actually the top half of the backplate of the dome brightness switch. It says "dome off" on the upper portion of the backplate. That one inch area - that barely depresses - is actually the switch to make the dome lights work with the door operation. Try pressing it and then opening your door. It should work. Good Luck!
Center is the off position. Position 2 is "on when doors are open", Position 1 is "on all the time". The switch (relay) that turns it on when the door opens is likely bad. Play with the button ont he door frame to see if this problem is there.
Also, check if the light comes on when you unlock the car when the swich is in position 1. If light does come on when unlocking, you have a bad switch on the door frame (turns light on when you open the door when the doors were already unlocked). If you don't get light, the switch by the dome light might be bad.
three things to check, first make sure the switch to adjust the dash lights is not turned the whole way which turns on the dome light, next make sure its not a push on and off dome light that someone forgot to push off,next would be one of the door switches is not adjusted correctly,which the computer would think a door is not close and keep them on
Been having a problem with the dome lights on a 99 chevy blazer. Still can't figure out what the problem is. There is a dome light overide button located under the dimmer wheel. When I push the overide button in the dome light goes off, but when I open any of the doors the dome light will not come on. When the overide button is out the dome light stays on all the time and will not turn off even though every door is closed. I checked all the pushbuttons and everything tests good. Has anyone had this problem and know how to fix it?
I could be a door switch.
1. switch dome light to door
2. close all the doors
3. open each door one by one. if the dome light comes on then you know that switch is good.
4. closed the door and wait for the dome light to turn off then move on to the next door.
5. If you find a door that does not turn on the dome light than bingo you have a bad door switch.
* the door switch may be your problem because of the constant abuse of slamming, closing , and opening the doors.
* This test is not 100%. it is just a visual test. and sometimes with a simple visual test you can diagnose your problem while saving time, and $