Radio turns on and off at free will - can you

Look in the fuel pump/filter area?

contact the kia sephia owners car club or the kia car club in your area and you will find fiends that will help you.

sound like dead battery,could have loose or broken alternator drive belt, if drive belt look okay,alternator could be faulty.

sound like dead battery,either alternator faulty or alternator drive belt could be loosen need adjusting or drive belt broken.

Here are the radio connector wiring colors and what they do.
2000 Kia Sephia Car Stereo Radio Wiring Diagram
Car Radio Constant 12V+ Wire: Blue/Red
Car Radio Ignition Switched 12V+ Wire: Blue/Black
Car Radio Ground Wire: Black
Car Stereo Illumination Wire: Red/Black
Left Front Speaker Wire (+): Black/Yellow
Left Front Speaker Wire (-): Blue/Orange
Right Front Speaker Wire (+): Blue/Green
Right Front Speaker Wire (-): Light Green
Left Rear Speaker Wire (+): Green/Red
Left Rear Speaker Wire (-): Green/Black
Right Rear Speaker Wire (+): Blue/White
Right Rear Speaker Wire (-): Red/Blue

i found one in a haynes book covers sephia and spectra 94 to 04 .i have no idea how to scan this an attach . theres not much to the diagram you have an audio 10A fuse hot in acc or run grn wire .you also have a room fuse 10A hot at all times pnk wire .both are in the i/p fuse block . in the fuse relay box you also have tail lh fuse 10A hot with lights on blu/wht wire the rest is just radio to speakers and antena . wish i could be more help

I have a 2000 kia sephia, i have went through 3 alternaters including brand new in 2 days. The alternaters are not charging my battery and burning the alternaters up with in minutes of putting them on. My engine light is blinking about 40 times. When i turn the trun signals on my speedometer an rpm gage jump up and down.

Hello smg86 and thank you for asking your question here on fixya.com.

I have actually written a general information article that will walk you through the general process of changing the fan belt on your 2000 Kia Sephia. It will also point you to the resources you need for getting the diagrams of how the belt needs to go back on. Belts usually cost less than $20 and take a few minutes to put them on.

Here is a link to that article:
How to change the fan belt on your 2000 Kia Sephia

If this has helped you in any way, then feel free to follow my Twitter account for more great money saving tips and tricks. twitter.com/acoates23234
I follow back, too. :)

Thanks for reading.

most the time the cigerette lighter fuse has blwon. that fuse goes for radio and probably int. light.some fuses feed other fuses so cig lighter fuse does not have a label that says radio. check all the fuses anytime you check for elect. problems

I have a 2000 kia sephia and you just take two screws behined the weel where the speedomitor is and pull slowly apart the plastic cover and then there are 4 srews to take it out un plug the wires to radio. Then you good.