OEM Trailer Wiring Harness not working - Kia Forum

 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 17 (permalink) Old 04-10-2019, 04:44 PM Thread Starter
Newbie
 
Join Date: Apr 2018
Location: AZ
Posts: 20
Drives: 2014 Kia Sorento SX
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)

Thread Starter (Thread Starter)
OEM Trailer Wiring Harness not working

I am getting no voltage out of any of the 3 wires for the trailer harness in the back. I did check the trailer fuse under the hood and it was fine, although i did replace it anyways just in case. Still no luck. Tried to clean the connections as well, still no luck. What steps can I take to diagnose where the problem lies? Where all does the OEM wiring run to?

thesuffering is offline  
Sponsored Links
Advertisement
 
post #2 of 17 (permalink) Old 04-10-2019, 05:50 PM
LMP
Senior Member
 
LMP's Avatar
 
Join Date: Mar 2005
Location: Chicoutimi, Quebec Canada
Posts: 332
Drives: Sorento 2015 LX 2.4 AWD, Suzuki 2011 SX4 AWD, ( 2000 KIA Sportage, junked)
Gallery: 0
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 72 Post(s)

Is this an OEM system coming installed from the factory with the vehicle trailer package or an OEM harness installed after the vehicle was bought ?
EDIT: my error...although KIA did provide me this wiring harness it is not made by KIA....but it might give an idea of the actual installation
https://www.curtmfg.com/part/56256
https://assets.curtmfg.com/masterlib..._56256_INS.pdf

Bought in Oct 2016 at 55000km, now (Apr 2019) at 73000 km. I like cars...

Last edited by LMP; 04-10-2019 at 06:02 PM.
LMP is online now  
post #3 of 17 (permalink) Old 04-10-2019, 07:06 PM
Senior Member
 
rejesterd's Avatar
 
Join Date: Apr 2016
Location: Boston, MA (USA)
Posts: 399
Drives: 2016 Sorento LX V6 AWD
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 141 Post(s)

It runs to the battery. How are you measuring the voltage? Have you tried just hooking up your trailer to it?
rejesterd is online now  
 
post #4 of 17 (permalink) Old 04-10-2019, 09:20 PM Thread Starter
Newbie
 
Join Date: Apr 2018
Location: AZ
Posts: 20
Drives: 2014 Kia Sorento SX
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)

Thread Starter (Thread Starter)
Quote:
Originally Posted by LMP View Post
Is this an OEM system coming installed from the factory with the vehicle trailer package or an OEM harness installed after the vehicle was bought ?
EDIT: my error...although KIA did provide me this wiring harness it is not made by KIA....but it might give an idea of the actual installation
https://www.curtmfg.com/part/56256
https://assets.curtmfg.com/masterlib..._56256_INS.pdf
it is an OEM system to my knowledge. has the kia branded hitch cover and all and the box the receiver was in has kia stickers so i have no reason to believe it isnt all oem.
thesuffering is offline  
post #5 of 17 (permalink) Old 04-10-2019, 09:23 PM Thread Starter
Newbie
 
Join Date: Apr 2018
Location: AZ
Posts: 20
Drives: 2014 Kia Sorento SX
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)

Thread Starter (Thread Starter)
Quote:
Originally Posted by rejesterd View Post
It runs to the battery. How are you measuring the voltage? Have you tried just hooking up your trailer to it?
Yes, multiple trailers, multiple harnesses between trailer and vehicle. nada.

Testing voltage with a test light. Grounding the gator clip and testing each receptacle
thesuffering is offline  
post #6 of 17 (permalink) Old 04-11-2019, 06:03 AM
Senior Member
 
rejesterd's Avatar
 
Join Date: Apr 2016
Location: Boston, MA (USA)
Posts: 399
Drives: 2016 Sorento LX V6 AWD
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 141 Post(s)

Yeah, that's how I'd be testing it.

On my 2016 V6, the connector for the wiring harness is under the rear driver's side wheel well cover. Maybe that connector is bad. Basically, you have to work backwards from there to the battery.
rejesterd is online now  
post #7 of 17 (permalink) Old 04-11-2019, 07:54 AM
Senior Member
 
Join Date: Apr 2018
Location: Belleville, ON, Canada
Posts: 357
Drives: Sorento SX AWD 2015
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 73 Post(s)

If the fuse is hot, both sides then do as suggested start from the back. I am not sure where they put the controller for trailer power. But it may have blown or has its own fuse. It depends on who made it. Its 10A max.

I assume this used to work for YOU? Right?

Many vehicles this doesn't work if the engine isn't running. I ran into that in a Jeep I had. I don't have a harness on ours to test as I don't two with it and it came with hitch which was for a bike rack. I have a heavier duty vehicle for towing.

Sorento SX V6 3.3L GDI, AWD 2015
19" Factory Rims, Class III hitch' NAV Current 54,000km Nov. 2018
Highlander 2012 4WD 3.5L Sport
Tripplec is offline  
post #8 of 17 (permalink) Old 04-11-2019, 09:24 AM
Full Member
 
Join Date: Nov 2013
Location: Florida
Posts: 92
Drives: 2014 Sorento EX
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 19 Post(s)

If it is a KIA OEM harness, there is another fuse. You have to remove the left tail lamp housing. It should be a plug in type hanging down in the cavity below the tail lamp. It could have blown if a shorted trailer harness was connected. Or it never had the fuse installed. It should be a 15 amp fuse. The underhood one should be a 30 amp so the rear one would most likely blow first.
rejesterd likes this.

Last edited by Watnext; 04-11-2019 at 09:30 AM.
Watnext is offline  
post #9 of 17 (permalink) Old 04-11-2019, 11:36 AM
Senior Member
 
Join Date: Apr 2018
Location: Belleville, ON, Canada
Posts: 357
Drives: Sorento SX AWD 2015
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 73 Post(s)

Interesting they did it that way and fuses that big. I have never seen a factory or aftermarket controller fused or supporting that much current. 30A under the hood is well into what an electric brake controller could easily operate on as well. I don't know if I want to look at my setup which I don't believe had the tow package by default. Just for curiosity.

Sorento SX V6 3.3L GDI, AWD 2015
19" Factory Rims, Class III hitch' NAV Current 54,000km Nov. 2018
Highlander 2012 4WD 3.5L Sport
Tripplec is offline  
post #10 of 17 (permalink) Old 04-11-2019, 11:55 AM Thread Starter
Newbie
 
Join Date: Apr 2018
Location: AZ
Posts: 20
Drives: 2014 Kia Sorento SX
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)

Thread Starter (Thread Starter)
Quote:
Originally Posted by Watnext View Post
If it is a KIA OEM harness, there is another fuse. You have to remove the left tail lamp housing. It should be a plug in type hanging down in the cavity below the tail lamp. It could have blown if a shorted trailer harness was connected. Or it never had the fuse installed. It should be a 15 amp fuse. The underhood one should be a 30 amp so the rear one would most likely blow first.
This is exactly the info i needed. Ill go out in the garage later today and check. You are right, the one under the hood was 30 amp. Would be great if its just a simple fuse issue.
thesuffering is offline  
Reply


Top

  Kia Forum > KIA Models > Kia Sorento Forum > 2014 - 2015 Sorento Forum



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List




  Similar Threads
Thread Thread Starter Forum Replies Last Post
How-to tips: Install Curt Trailer Hitch and Wiring Harness on 2016 Sorento bikepoet 2016+ Sorento 91 08-13-2018 07:14 PM
2016 Sorento V6 AWD Trailer Wiring Harness parrycm 2016+ Sorento 8 02-28-2017 06:01 PM
Does 2013 V6 AWD have Trailer Hitch Wiring Harness? 2013kialx 2011 - 2013 (XM) Sorento Forum 6 10-20-2016 01:32 PM
Trailer wiring harness for 4cyl LX sokkerdad 2016+ Sorento 9 04-11-2016 12:56 PM
2002 Kia Rio Tail light Trailer Harness wiring issue? paulw517 1G (2001-2005) Rio 0 07-22-2008 06:14 AM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On