I would spray them down with solvent and dry off with a rag. Re-tape them or some sort sort of loom. Look for nicks in the wire. Be sure to ohm the solenoid coil to see if it's shorted.

You probably need a whole engine wire loom to replace that wiring.

 

Would something like this work for the solvent? Amazon.com: CRC 05103 QD Electronic Cleaner -11 Wt Oz : Automotive

 

Yes that would be fine. Be sure to get the ECU and TCU. I got some green corrosion the pins once. Don't know how but it can happen. After cleaning them with that spray I would spray some WD 40 like lube in them to leave a water rejection coating. You could use WD 40 for the cleaning too FWIW.

 

Oh okay cool, I'll just use WD 40 then, thanks. I'll post updates as well

 

So the wires are nicked and some are actually broken. :/ Is this even fixable? I'm pretty sure the wires were already broken before I started messing with it.

 

^ Not sure why that's marked as sensitive..

 

I used WD-40 and wiped it off then wrapped it in electrical tape. I guess I didn't wipe it enough because when I went to start the car to see if just that fixed it, the car ran for a few seconds then died. It cranks, but will not start. I have a bunch of new codes: P0079, P0335, P0076, P0445, P0245, P0034, and P0448. I don't know what happened or really how to go about fixing it at this point.

 

unshielded wires - unwrap the tape from it.

ONE WIRE AT A TIME -
cut out the unshielded part
expose nice clean wire on both sides
slip some shrink tubing over one side of the wire (can get at any hardware store)
solder both sides of the wires together
slip the shrink tubing over the solder joint and heat up with a lighter to have it seal the wire

Then repeat with the next wire.

I said "one wire at a time" so you won't end up mixing up wires.

FYI that bundle of wires, has the wires for both wastegate and boost solenoids, as well as the power steering pressure sensor IIRC.

 

unshielded wires - unwrap the tape from it.

Makes sense, I feel dumb now lol. Thank you. I'll do it tomorrow and post the results.

 

The WD 40 will not conduct electricity, neither will oil. Either the pins are bent or some wires have been damaged. All I see from Hyundai is the complete engine harness at about $2300 and there are 5 or 6 different ones depending on trim and options.

 

petroleum based oils will break down the insulation over time.
Reason why dielectric grease is a thing. dielectric grease is silicone based, and won't break down petroleum based parts like wiring insulation and plastics.

 

WD 40 is mostly a solvent and evaporates. Great cleaner and water proofer for wires. As it leaves behind it's patented fish oil extracts or whatever it is. Milky white base. I've seen wet spark plug wires that go from not starting to starting with nothing more than a quick spray.

 

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It's definitely damaged wires and the fact that they were touching each other. Buying a complete harness is a last resort.

 

We use to use WD 40 to clean off the grease pencil marks from industrial batteries we made. Got it in 55 gallon drums. But they never mixed it and the white active ingredient would settle out. I have about 5 gallons of it It worked better as a cleaner than the mineral spirts.

 

mineral spirits is a solvent for oils, in that it leaches oil (or tries to) out.
In that way mineral spirits breaks down rubbers and plastics in a different way. When it dries it becomes hard and brittle.

Using petroleum based oils on petroleum based plastics and rubbers, the oil tries to enter the plastic/rubber to "dilute" it.
Reason why you DON't use petroleum based oils on weather seals, radiator hoses, and tires. They lose their integrity and become all gummy.

wiring insulation is petroleum based because it's cheap and is one of the waste product of gasoline manufacturing. It's then blended with another waste product of ethanol manufacturing (e85/corn based) to allow the "plastics" to break down over time (in case a car is sitting in the middle of nowhere for decades).

As I said dielectric grease exists for a reason...
Most of this was beaten into me, when I was helping out are fleet maintenance in the one of BP's oil fields. Everybody is working through a contractor, and everybody is trying to make things run a long a possible to save a buck...
But everything goes to not, when someone leaves a sandwich in a truck out in the fields, and a polar bear gets wind of it....
No joke, polar bears will tear open a f350 like a beer can to get at any food.

 

I think the wiring used in auto is a bit more than the cheapest stuff they can find.