TPS has 5v in ground wire?

Hello LESLIE PAYNE,

Thank you for the information.

I have a theory, but we have to do some more tests. I think the issue with the A/C might be causing the fans not to operate.

When you test the connector on the resistor, was the A/C turned on? If not, turn it on and see if we get 12 volts on either one when connected to ground.

Next, there is a fuse, 10 amp, red. I have highlighted it on your fuse panel diagram you sent me. Check this fuse with the key on and see if you have 12 volts on both sides of this fuse. (see image)

One of those light blue wires might be going to the A/C relay, Rad1 or Rad2, next to this fuse we just tested. I have added the diagram again, this time highlighting the relay. (see image)

Let's see if we can identify some of the wires on the A/C relay. I want you to check all the cavities this relay plugs into, testing voltage only. The same way you did the other ones.

Key Off- Go through and see which have voltage.
Key-On-Engine-Off- See which ones have voltage then.

Could you please send me a picture or 2 of the resistor uninstalled as well?

Here is a video of some tests you can do on the resistor itself, removed from the vehicle.
https://youtu.be/LUNvzyvn8J8
(You might want to mute it the music in it is very loud)

If the resistor is bad there will be a spot where you get no reading. Let me know what you find.

Can you tell me some more about the A/C?
Does it work?
Is the compressor coming on?
Anything else you have noticed.

Try unplugging the resistor and using a single wire jump the 2 terminals on the connector.

Did the fan come on when vehicle was hot?
What about if the A/C is turned on?

Then could you to remove both Rad1 and Rad 2 relays. Using the multimeter on resistance put one lead at terminal 85 the relay cavity for Rad1. Then with the other lead, touch one terminal on the resistor connector, then the other.

Repeat for then the next relay Rad2.

If you get a reading but not over limit or "I" for infinite, then that wire is what is controlling the relay.

Let me know what you get from those tests. Something is keeping the fans from coming on when the A/C is turned on. I think it is affecting the entire fan circuit. So, I want to see if we can I identify some more wiring.

I am going to keep working on my end, let me know what you come up with.

Thank you,
Brendon

P.S. The 20K scale is ok I can just convert it, but it would be better and more accurate if we used a lower scale. But if 20K is what you are comfortable with, then we will work with it.

Hello LESLIE PAYNE,

Yes, the numbering does help. Thank you.

1) Can you remove the A/C relay next to the fuse. Just check for voltage and see if you got power to that.

We are looking for 12 volts on 87 again and key on 12 volts on 30, same as the 2 fan relays. No Ohm's, just voltage.

2) If the fan relays and the A/CON relay are the same, try switching them. Look at the side and make sure amperage is the same and part number is the same.

If so, try switching them around and see if anything happens. Make sure they are exactly the same though if not, do not switch them around.

If you are unsure, you can send me images of all 3 of them and I will be able to tell if they are or not.

3) If you could test this relay just like we did with the others. Here is the link to the test again for you:
https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

3) Something is turning off power to that fuse and it might be affecting the whole cooling fan circuit.

But let see what you have for readings and see if we can figure out why that fuse has no power.

4) I would check all the other fuses in that panel and any others to make sure nothing else is missing power. They shouldn't be, but let's check and see just in case.

Thank you for all your testing and patience as we try to figure this out.

Thank you,
Brendon

Hello LESLIE PAYNE,

5) I have circled some fuses in green. Please check these fuses. For the square ones with the clear top, even if they don't appear burnt out. Remove them and test with your meter on resistance.

I would disconnect the battery so when you go to remove or put back in it doesn't pop one of them, just so you don't get stuck with a burnt fuse and no way to go out and get it. Also so we don't cause any surges in electricity.

I have re-added the diagram of your fuse box and circled in green the additional ones to check.

Let me know what you find.

Please let me know if you have any questions.

Right now, we got to figure out why that fuse has zero power.

Also, a friend has helped us immensely by finding us an entire service manual for the Gen 1 Picanto.

Here is the link to the manual:
https://www.allcarmanuals.com/factory-service-manual-395-Kia-Picanto-SA.html

Turns out if the A/C fuse is burnt out, the fans will not operate. But since there is no power on either side of the fuse, I think the PCM isn't sending the signal. It's either the PCM itself, wiring harness or whatever caused the A/C to stop working in the first place.

I am leaning more towards the harness or an issue with the A/C.

I just got it myself so I am going to look it over and see what we can figure out. Let me know how those tests go and if you find anything.

Thank you,
Brendon

The manual is a free link and can be downloaded and saved or printed out as needed. That way you can always access it.

Hello LESLIE PAYNE,

That link I sent you should take you right to the online downloadable PDF file. I was able to use on my computer.

You will need to click on the part that says, "Click here to view download link" (see image in green).

This will refresh the page and you will see "Download Link". Please right click on this link (see image in red) and click "Save As".

Just save it to your desktop for now.

Then open and view the PDF. You should have around 1478 pages of information on your vehicle.

I have it on my computer, and it works fine.

Unfortunately, because your vehicle was never sold nor produced in the U.S, getting information is near impossible. Steve took his own time to get this for you. It may not be everything you are looking for, but it is certainly a lot more than we had. I myself am very thankful.

The wiring diagrams start at page 1380. There may be a collapsible menu in your PDF viewer. Mines has one and it gives me a table of contents.

I have also added a screenshot from my side showing my PDF viewer. I am running Windows 11 though so yours may be a little different if you are using MAC or an earlier version of windows.

Take a look at my images and see if there is anything missing. I would prefer to help you get access on your end rather than have to screen shot everything to you, so you have the entire manual whenever you need it.

Please let me know if you are able to download.

I am glad you would like to learn about wiring, and I am here to help you as much as I can.

Also thank you for the information on the 4-wire temp sensor. I really appreciate you sharing that. Something I have never come across.

I think a bad PCM ground is a possibility, but the issue might be more localized to a specific connector.

I think taking a look at power and ground for the PCM is a good idea. Since you are having cooling fan issues and shifting issues, it is possible they are related.

Let me take a look at these diagrams and see if I can find out where the ground is located for it. I also want to look and see if the fans are in the same connector as the transmission at the PCM.

I also need to look at what would have caused the A/C to die on you because whatever happened there has shut off the entire fan circuit it seems, which in turn might be causing the trans issue. However, because it is only affecting one gear it may be something internal to the transmission.

But like I have said before if the engine isn't running properly then the transmission isn't going to work properly.

If the compressor died or there was some kind of issue with pressure in the system, it would cause the PCM to shut down the A/C and since it is connected to the cooling fan circuit shut that down as well. It might be a simple as a bad Pressure Transducer or Ambient Air Temp Sensor or the compressor.

Let me take a look though and see what I can find for you. In the meantime, see what else you can come up with on your end. Since it will be raining a lot for the next week or so, just see what you can do on the computer.

By the way, that's a nice truck! Too bad you didn't still have it. That would be much more interesting plus we wouldn't have to worry about all this wiring, lol. The 30's, 40's and 50's vehicles are some of my favorites. Sure 60's, 70's, 80's and 90's had plenty of nice vehicles but before that, in my opinion the vehicles looked much better. A lot more art and care went into building them. My favorite, well one of them, is the 1941 Willy's Coupe. Such a beautiful car. Maybe someday I will have it. Tri-5 Chevy's are also some of my favorites as well.

But stay dry and safe. Try the download and see if you can get it to work for you. Like I said I am working on my end to see what might have gone wrong.

You may want to take it to that A/C shop and see if the compressor failed, or a seal in the A/C system and see what it has for refrigerant in it, once the rain stops of course.

Thank you,
Brendon