Question about 2001 Mercury Sable
On the door or the door frame, there is a button. It opens a circuit to turn the light on. See if the button is stuck first. If its stuck in, gently pull it out and see if the light comes on. If it does, close the door and open it again. Make sure the button is working. you may have to replace it. Also check your fuses, sometimes it may be a blown fuse, controlling a few other things also. Just replace the fuse. You can get a Chilton's manual for you car at any auto parts store. It will help you in the long run. It will tell you what fuses are what and where things are, and how to fix things. Hope this helps
Posted on Dec 30, 2010
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Posted on Jan 02, 2017
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One way is through the door ajar switches. Circuit M2 connects to all the door ajar switches from the dome lamp. The switches are case-grounded to the body. When a door is opened, the plunger in the switch closes, completing a path to ground.
The second ground path is through the headlamp switch. Circuit M2 is spliced in with the door ajar switches. When the operator turns the headlamp switch to the dome lamp ON position, a ground path is provided through the switch on the Z1 circuit. This ground terminates at the instrument panel left center support.
The time delay relay is used to allow a time-ON function for the ignition switch lamp. Power for the relay is received on the M1 circuit from the 10 amp fuse located in the Power Distribution Center (PDC ).
When a door is opened, or the headlamp switch is moved to the dome lamp position, a ground path is provided for the relay on the M2 circuit. This energizes the relay, closing the contacts. When the relay contacts are closed, power is provided through the relay to the M50 circuit.
The M50 circuit supplies current to the ignition switch lamp in the steering column. Ground for the lamp is provided on the Z3 circuit. This circuit splices with the glove box lamp, the ash receiver lamp, and the PRNDL lamp. The Z3 circuit terminates at the instrument panel left center support.
So, I would check the time delay relay since it supplies power to the circuit. Also, check for a good ground at the instrument panel left center support.
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