Question about 2003 Ford Excursion
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Posted on Jan 02, 2017
SOURCE: door ajar and dome lghts
Probably a door switch, check them first. Go to each door with a can of penatrating oil, find the switch in the jam, give it a shot and work the button manually until they're all freed up. Watch the light while you do this to eliminate which one's causing the problem. Please post your results.
Posted on Feb 08, 2009
You have to remove the right front inner fender plastic liner to access the horns. To get to the bolt that holds them you have to remove the battery and tray.
Posted on Mar 24, 2009
It looks like one of the plungers on the switch at one of your doors has broken off. If not it is in your main switch (I doubt it tho)
Posted on Jan 01, 2010
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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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