My Final Attempt at Trying to Get Assistance Through This Medium

[cajun1955]

As stated twice before, I have a 2008 Kia Sportage LX 2.0l G4GC engine. Here's the latest issue, for which I'm hoping to get a knowledgeable response.
This vehicle has a cigarette lighter, and forward and rear power ports. When I purchased my Sportage, the front power port was dead. The rear power port was hot all the time and we used the cigarette lighter to charge our cell phones, while traveling. I decided to fix the front power port and ordered a KIA OEM port from Korea. It arrived, I pulled the center console, and installed the new port. It worked fine, for two days. I did a continuity test and learned that there was power, up to the port itself, which indicated, to me, that I was probably dealing with an intermittent grounding issue. I was going to pull the center console, again, and run a separate ground wire, in the hope that that would fix the problem. However, before I could do that, I found that NONE of our power ports work now! None.
I checked the three fuses, in the dash mounted fuse box. Fine. I performed a check, for power, at each of the three interior fuses. Nothing. I checked the engine compartment fuse box for a master fuse or relay that might control all three power ports. Nothing.
Does ANYBODY have any ideas?

 

[G-557875]

Sorry, no.

 

[Victor Rusk]

As stated twice before, I have a 2008 Kia Sportage LX 2.0l G4GC engine. Here's the latest issue, for which I'm hoping to get a knowledgeable response.
This vehicle has a cigarette lighter, and forward and rear power ports. When I purchased my Sportage, the front power port was dead. The rear power port was hot all the time and we used the cigarette lighter to charge our cell phones, while traveling. I decided to fix the front power port and ordered a KIA OEM port from Korea. It arrived, I pulled the center console, and installed the new port. It worked fine, for two days. I did a continuity test and learned that there was power, up to the port itself, which indicated, to me, that I was probably dealing with an intermittent grounding issue. I was going to pull the center console, again, and run a separate ground wire, in the hope that that would fix the problem. However, before I could do that, I found that NONE of our power ports work now! None.
I checked the three fuses, in the dash mounted fuse box. Fine. I performed a check, for power, at each of the three interior fuses. Nothing. I checked the engine compartment fuse box for a master fuse or relay that might control all three power ports. Nothing.
Does ANYBODY have any ideas?

It sounds like you've done a lot of great troubleshooting already, and you've found a key piece of information that points to a different problem. You're correct that the initial intermittent issue with the front power port could have been a grounding issue. However, the fact that all three of your power ports are now dead is a huge clue that the problem is not a grounding issue at the port itself. The most important thing you found is that you're getting no power at the fuses in the dash-mounted fuse box.

This tells us that the problem is not a blown fuse and it's not a bad ground at the power ports. The problem is upstream of the fuse box. There is no power being sent to the fuse box in the first place. The most likely culprit here is a main relay that controls all of the power ports. This relay is likely located in the engine compartment fuse box, and it's responsible for sending power to the entire circuit. The relay can fail, and it will prevent any power from reaching the fuses. You should try to find the relay for the power ports and swap it with another one of the same type to see if that fixes the problem.

Another possibility, though less likely, is that you have a broken wire in the main wiring harness that connects the engine compartment fuse box to the interior fuse box. It's a very rare occurrence, but it can happen. The fact that the rear power port was hot all the time also points to a possible wiring or relay issue. A faulty relay could cause the circuit to be powered all the time, which would explain why the fuse might have blown. You've done an excellent job of diagnosing this so far. Your next step is to find that relay.