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As the title states, my power locks and dome light on my 2002 Civic LX 2 coupe only work with the ignition in the "on" position. I just bought the car and noticed this problem. Also my car doesnt beep when I leave the lights on or the key in the ignition...any ideas?

 
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no worries, it's just a fuse, happened to me before, i forgot which one so just check them all

 
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Thanks....I'm going to bust out the light tester!!!

 
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It is the "back up" fuse in the under hood box.

It should fix the key alert as well, If not check the drivers door plunger switch.

 
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Much appreciated!!!

 
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I've got the same problem, except it is just the dome light that won't work. I used a voltmeter and got no reading from the plug itself until I turned the car on. I've checked all the fuses, they're fine.

I'm thinking my main problem is the part with the switch at least. Looks melted from the side that faces the roof of the car, I attached a picture of it.

But I figured the plug would at least have constant power even if the car is off, since its operating as a switch.

 
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i think you just melted too much of it to fix. just look for a new piece on ebay.

 
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^^^^I would start with a new domelight assembly it should solve it.

The bulbs are supplied constant power and the ground is provided either at the switch for "on" or through the multiplex for "door".

 
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i have the same problem with my 02 ex. Doors lock when vehicle is on but not when its off. all my fuses are good. Any other solution.

 
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my obd 2 dosent pick up my car either. says its not connected

 
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I would check for voltage on both sides of the back up fuse in the under hood box. The fuses have a small exposed area of metal at the top for a testing probe.

Sounds as if you are missing some constant voltage sources

 
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Thx for all the help. everything works now. the back-up fuse was bad thx