2006 Ford F-250 dome light won't turn off.

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Old 12-09-17, 08:11 AM
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2006 Ford F-250 dome light won't turn off.

I'm working on a 2006 F-250. The door ajar indicator comes on, when the ignition switch is on and the dome light cycles on and off when the ignition is off. I have disconnected both switches in the doors. The wires going into the doors seem to be ok. Is there a relay or control module that could be faulty?
 
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Old 12-09-17, 08:29 AM
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Check headlight switch or a dimmer switch in dash.
 
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Old 12-09-17, 08:49 AM
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Yes, I checked the switch on the dash. The light stays on for the normal security time and shuts off, just like it's supposed to, but then it turns back on again for the security time and shuts of, then turns on again. That is what I meant by cycling.
 
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Old 12-09-17, 10:25 AM
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There is a module that controls things like that. It's something like a general electronics module (GEM) or electronics control module (ECM). If they get wet from a windshield leak they will make your truck do all kinds of weird things. They seem to straighten out if/when you dry them out. It could also just be going bad.
 
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