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Power Feed Mystery

Old Oct 30, 2025
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Power Feed Mystery

Hi, I have a 2005 Honda Civic sedan. It has a problem with the power feed to some accessories so I’m looking for help as to what the problem might be.

Some clues:
Dome light switch has power all the time because it comes on with the switch at the light as it should

Dome light also comes on with any door opening IF the ignition switch is in the “run” position

Otherwise, the dome light does not come on when a door opens

Power door locks only work when the ignition switch is in the “run” position AND the doors are closed

All doors do not lock when locking the driver’s door from inside or from outside with the key

Key fob won’t operate power door locks

No chime when the key being left in the ignition switch

Radio does not work, no clock, screen is blank

“Seatbelt not fastened” chime does work

“Headlights left on” chime doesn’t work (if it is supposed to alert for this)

Cigar lighter has power

Thanks for any advice on this I am stumped!

Last edited by mzg358; Oct 30, 2025 at 09:48 AM.
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Old Nov 2, 2025
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Re: Power Feed Mystery

you will need to chase broken wires, shorts, etc, sorry... R U familiar with multimeters?
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Old Nov 2, 2025
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Re: Power Feed Mystery

Originally Posted by sdaidoji
you will need to chase broken wires, shorts, etc, sorry... R U familiar with multimeters?
yes l am familiar with the work and tools but l don’t have a wiring schematic so it’s very unlikely l will find the problem. I looked for loose connections and wires chewed by animals because the car was sitting for a long time but everything looks normal as far as I can see. I was just hoping that somebody had heard of this exact same situation before and discovered a bad ignition switch or poor ground or something like that
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Old Nov 4, 2025
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Re: Power Feed Mystery

wiring schematics -choose the ones that are newest to see if links still works:

https://www.civicforums.com/forums/1...updated-3.html
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