All wires, motors and connections check out good. Seems to be bond up.
I would put money on it being a faulty switch, if your confident enough take it apart and clean the contacts inside, but beware its a fiddly job with tiny bits that you can lose, so do it where you can keep track on the bits, not in the car. the seat is moved via 2 switches that are inside the unit, these do get dirty internal contacts due to being made from cheap components. Unfortunately I don't have a diagram, but if the seat will move forward/back and up/down, then I think it will be the switch.
SOURCE: Where is the input speed sensor on KIA sedona 2005
on transmission has 2 wires at right side of trans .by axel
SOURCE: We cannot remove 2nd seat in our 02 Kia Sedona. We
move seat completely back.take off head restraint,tip backrest forward flat to seat, then, grab the pull cord and pull backward so that seat tips forward then grab bars on front of underseat and squeeze together and lift.be careful these seats ARE HEAVY.
SOURCE: need to replace water pump in2005 kia sedona
The kia sedona water pump is an internal pump and needs to be replaced with timing belt service. if it is leaking, then you need to change the timing belt as well. probably not something you want to do in the back yard and will run you between 400 and 600 depending on your location and shop.
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SOURCE: drivers power seat layed all the way back will not
I had this same problem. These symptoms occur when the switch contact points become burned... but the problem is easily repaired with some very simple tools and will save $200 in repair bills.
1. Remove the plastic molding in which the switch unit is mounted. It is easiest to remove the whole thing - 6 phillips head screws hold it in place. Depending on the seat position, it may be impossible to remove the molding without also removing the seat - 2 nuts, and two bolts - a 9/16" wrench will work fine. Unplug all necessary cables for the removal. They are all different and only fit one way, so they can't be confused.
2. Use a small standard screw driver (jewelers size) to carefully pop the back off the switch unit and carefully lift out the circuit card with the switches mounted on it.
3. Place the circuit card (switch side DOWN) on the edge of a table or work bench and firmly hold it in place while using the jewelers screw driver to very carefully pop the covers off of the switches. There are small parts inside, the slider, two small bearings, and two switch rockers, so just work on one switch at a time.
4. With the switch cover removed, note how the pieces fit together so you can reassemble later.
5. Remove all the loose pieces and burnish (polish) all burned or corroded contact points, both on the loose and fixed parts. The edge of the jewelers screw driver, a stiff eraser, a small piece of very fine sand paper, or a dremmel polishing head will do the job.
6. Reassemble the switch, and repeat with the other four switches. Though the other switches were working, I found them to also be burned / corroded and near failure. Better to fix them all while the unit is disassembled, than repeat again (and again) in a short period of time.
SOURCE: My kia sedona driver seat
No I am sorry to say there is not, check the wire bundle under the seat it might be a loose connection, if not go to the dealer.
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