Question about 2003 Chevrolet Blazer

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Dome light stays on as if a door is open and alarm sounds too

The car is behaving as though a door is open when it is not. If a door were to be open the dome light would stay on, also you couldn't lock the door with autolock button which you can't. Also when you put the car in gear it is supposed to lock the doors but it won't as though a door is open and then to top all this when you leave the car and have locked it the alarm will go off all on its own at all hours of the day and night. The dealer can't even figure this out....help!

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  • hwwmi Mar 12, 2009

    I have taken it to the dealer and they replaced the drivers door latch but that hasn't fixed it. Please keep suggestions coming.

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Bring ur car to a electric car workshop and they will find the problem for u....make sure u disconnect the alarm system before u drive there....u may have the cops following u with ur alarm on.....

Posted on Mar 12, 2009

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The door keeps saying it is open and i replaced the door sensers but its not that can you help


Hello melvin... When the light stays on it usually means a door is open or the switch on a door or liftgate/trunk is bad. If the door adjar button is seperate from the latch assembly I pull the switch from the body and jump it out. Go one by one and you will find the failed switch. If the switches check ok and the connector is jumped and the light is still on then there is an open in the wires for the door ajar switch
Here are more procedures for troubleshooting...

Possible causes are :
1. Door switches stuck in closed position. Remove the rubber cover and loosen the screw holding the door switch. Pull out switch and check if the light stays on....if light remains on, fault is not with switches.

2. Anti-theft system ECU shorted. One of the wire goes to the alarm control unit. Unplug the alarm unit, if equipped and test.

3. Shorted interior dome light. If dome light is not working in the door ajar mode, remove the dome light and unplug the connector. If indicator light does not go off, fault is not with dome light.

4. Shorted Red/White wire. This would be the most difficult to diagnose as the shorting can be anywhere between the door switches to the indicator light. If you had done any wiring repairs prior to this happening, backtrack to check if any part of the wire is exposed and grounding

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