How to access the floor wiring harness?

[corneliusw]

How do you replace the floor wiring harness for 2016 sedan? I see the part #91357-B1501. How exactly does one access the connectors to the harness so an electrical cleaner can be used on them?

 

[GarnetTy1473]

How do you replace the floor wiring harness for 2016 sedan? I see the part #91357-B1501. How exactly does one access the connectors to the harness so an electrical cleaner can be used on them?

That harness goes from the firewall, all the way to the taillights. What connectors are you wanting to clean?

 

[greekgeek]

Earlier this year I had the wiring harness replaced in a 2015 5.0, they pulled out the entire interior and the dash and center console. Also modules for the BSD etc and rear trunk. They had the car like 60 days...

Godspeed.

Post in thread '2016 Genesis AWD multiple dashboard lights, no gauges, mileage not recorded and more'
2016 Genesis AWD multiple dashboard lights, no gauges, mileage not recorded and more

 

[corneliusw]

That harness goes from the firewall, all the way to the taillights. What connectors are you wanting to clean?

The lead mechanic at the Hyundai dealership didn't specify the exact connector, but I believe it's the one that leads to the airbag module. All the computers in the car work 100% as they did a test on each one, however, there's a connection issue with the wiring harness as the dashboard is flashing warning signs for everything. The dealership obviously obviously to replace the entire wiring harness, so I'm looking at $6k worth of work. Spoke to the actual mechanic that performed the inspection on the vehicle privately and he said most likely I just need to use an electrical cleaner on the wiring harness from AutoZone and it'll create the connection it needs to and erase all the error messages on the dashboard because there's nothing wrong with any of the computers inside the car. But the dealership themselves would only replace the entire harness, not fix the current one.

 

[corneliusw]

Earlier this year I had the wiring harness replaced in a 2015 5.0, they pulled out the entire interior and the dash and center console. Also modules for the BSD etc and rear trunk. They had the car like 60 days...

Godspeed.

Post in thread '2016 Genesis AWD multiple dashboard lights, no gauges, mileage not recorded and more'
2016 Genesis AWD multiple dashboard lights, no gauges, mileage not recorded and more

That's a long time and a lot of dragging their foot around for 60 days. I'm not a mechanic, have never studied under a mechanic and I have done a lot of work on Hyundai's and I can't imagine spending a week on it for a wiring harness. Like example I've replaced both front seats myself which took me less than 20 minutes, but you go to a mechanic and they'll act like it's a whole day job to remove some seats. I've replaced modules (less than 5 minutes), center console (less than 10 mins), etc and that stuff literally takes minutes. However, go to a dealership to get the work done and they're charging hours and when they talk to you they make it seem like a big deal to remove a part from a car. Now obviously they have to charge high amounts to cover expenses of employees, rent, etc expenses. But the point being made is your car should have never been kept for 7 days, let alone 60 days for wiring harness lol. Cause if you do 1 action a day it wouldn't equal 60. Day 1 remove passenge seat. Day 2 remove driver seat. Day 3 remove center console. Day 4 remove backseat, Day 5 pull up carpet. Day 6 inspect undeneath. Day 7 remove harness. Basically there's not 60 steps or even half that amount to get to the wiring harness I assume.

The price of a mechanic is in their knowledge and their comfort on working on something. Dealing with cars is not difficult at all. Now swapping motors out is tricky, but we are not talking about engine swapping lol. Mechanics have to make their money somehow which is why they exaggerate on how much time it takes. I'm a marketer for 15+ years and it doesn't take much time to create and manage successful campaigns but you speak to an agency and they'll make it seem like they have some magic potion they have to create to charge you some ridiculous fee smh when the reality is we just need you to spend about 5k in ad budget for the first month so we can collect enough data to narrow down your audience to make our job easier. Same applies to programmers who charge an arm and a leg to build a simple app that should take only a day to code (3 max) but yet they charge for 3-4 weeks worth of work. I code also so speaking from knowledge.

*No disrespect to any mechanics here.

 

[arcman]

Go read this... My car was 'Totaled' by the insurance company over a part costing $1.46

As you'll see from my experience, CAN Bus/module errors can come from all kinds of places.

Start by disconnecting modules one at a time and see what response the dash throws up.

 

[greekgeek]

That's a long time and a lot of dragging their foot around for 60 days. I'm not a mechanic, have never studied under a mechanic and I have done a lot of work on Hyundai's and I can't imagine spending a week on it for a wiring harness. Like example I've replaced both front seats myself which took me less than 20 minutes, but you go to a mechanic and they'll act like it's a whole day job to remove some seats. I've replaced modules (less than 5 minutes), center console (less than 10 mins), etc and that stuff literally takes minutes. However, go to a dealership to get the work done and they're charging hours and when they talk to you they make it seem like a big deal to remove a part from a car. Now obviously they have to charge high amounts to cover expenses of employees, rent, etc expenses. But the point being made is your car should have never been kept for 7 days, let alone 60 days for wiring harness lol. Cause if you do 1 action a day it wouldn't equal 60. Day 1 remove passenge seat. Day 2 remove driver seat. Day 3 remove center console. Day 4 remove backseat, Day 5 pull up carpet. Day 6 inspect undeneath. Day 7 remove harness. Basically there's not 60 steps or even half that amount to get to the wiring harness I assume.

The price of a mechanic is in their knowledge and their comfort on working on something. Dealing with cars is not difficult at all. Now swapping motors out is tricky, but we are not talking about engine swapping lol. Mechanics have to make their money somehow which is why they exaggerate on how much time it takes. I'm a marketer for 15+ years and it doesn't take much time to create and manage successful campaigns but you speak to an agency and they'll make it seem like they have some magic potion they have to create to charge you some ridiculous fee smh when the reality is we just need you to spend about 5k in ad budget for the first month so we can collect enough data to narrow down your audience to make our job easier. Same applies to programmers who charge an arm and a leg to build a simple app that should take only a day to code (3 max) but yet they charge for 3-4 weeks worth of work. I code also so speaking from knowledge.

*No disrespect to any mechanics here.

Well, it actually took more like 3+ years and three dealerships, across three states to resolve the problem. One trip on Flat Bed. Multiple visits and incidences of failure of multiple systems, each time they could not figure it out other than disconnect stuff and reconnect. Came back like once a year-ish.

ironically the symptom randomly came back while I had the car in for a different electrical issue, turned out to be a fortunate coincidence, or perhaps was related.

Thankfully it was fixed at the tail end of its warranty, well knock on wood it’s fixed...

60 days in the shop was a Long stretch but you know what, with a loaner it was only a mild inconvenience. I was just excited to finally have some real resolution to a long-standing electrical problem.

diagnosis took a long time W/ Hyundai engineer, approval of the work, Get the part etc., oh yeah and COVID was just blowing up around then too.

i get your point but we are at the mercy of the dealer for warranty work, good luck bucking that system.

 

[greekgeek]

I’ll add that considering the number of people on this site alone with similar symptom, Hyundai probably knows what the root case of the wire harness failures is by now, probably a TSB. No way in hell would they be offering $6k fixes to people if they didn’t need to.

 

[GarnetTy1473]

The lead mechanic at the Hyundai dealership didn't specify the exact connector, but I believe it's the one that leads to the airbag module. All the computers in the car work 100% as they did a test on each one, however, there's a connection issue with the wiring harness as the dashboard is flashing warning signs for everything. The dealership obviously obviously to replace the entire wiring harness, so I'm looking at $6k worth of work. Spoke to the actual mechanic that performed the inspection on the vehicle privately and he said most likely I just need to use an electrical cleaner on the wiring harness from AutoZone and it'll create the connection it needs to and erase all the error messages on the dashboard because there's nothing wrong with any of the computers inside the car. But the dealership themselves would only replace the entire harness, not fix the current one.

Airbag connectors you cannot replace. The cutting, splicing, and soldering can cause some resistance variations that could cause other issues with the airbag system. You do not want this considering there is an airbag in your face that could go off at any time killing you or a passenger.

That's a long time and a lot of dragging their foot around for 60 days. I'm not a mechanic, have never studied under a mechanic and I have done a lot of work on Hyundai's and I can't imagine spending a week on it for a wiring harness. Like example I've replaced both front seats myself which took me less than 20 minutes, but you go to a mechanic and they'll act like it's a whole day job to remove some seats. I've replaced modules (less than 5 minutes), center console (less than 10 mins), etc and that stuff literally takes minutes. However, go to a dealership to get the work done and they're charging hours and when they talk to you they make it seem like a big deal to remove a part from a car. Now obviously they have to charge high amounts to cover expenses of employees, rent, etc expenses. But the point being made is your car should have never been kept for 7 days, let alone 60 days for wiring harness lol. Cause if you do 1 action a day it wouldn't equal 60. Day 1 remove passenge seat. Day 2 remove driver seat. Day 3 remove center console. Day 4 remove backseat, Day 5 pull up carpet. Day 6 inspect undeneath. Day 7 remove harness. Basically there's not 60 steps or even half that amount to get to the wiring harness I assume.

The price of a mechanic is in their knowledge and their comfort on working on something. Dealing with cars is not difficult at all. Now swapping motors out is tricky, but we are not talking about engine swapping lol. Mechanics have to make their money somehow which is why they exaggerate on how much time it takes. I'm a marketer for 15+ years and it doesn't take much time to create and manage successful campaigns but you speak to an agency and they'll make it seem like they have some magic potion they have to create to charge you some ridiculous fee smh when the reality is we just need you to spend about 5k in ad budget for the first month so we can collect enough data to narrow down your audience to make our job easier. Same applies to programmers who charge an arm and a leg to build a simple app that should take only a day to code (3 max) but yet they charge for 3-4 weeks worth of work. I code also so speaking from knowledge.

*No disrespect to any mechanics here.

This harness requires the removal of the entire interior. Dash, seats (front and rear), A & B pillar trim, center console, trunk floor and side trim. It is not a quick fix. It will take all day, and then some.

 

[corneliusw]

Airbag connectors you cannot replace. The cutting, splicing, and soldering can cause some resistance variations that could cause other issues with the airbag system. You do not want this considering there is an airbag in your face that could go off at any time killing you or a passenger.

This harness requires the removal of the entire interior. Dash, seats (front and rear), A & B pillar trim, center console, trunk floor and side trim. It is not a quick fix. It will take all day, and then some.

Thank you for explaining exacting what all have to be removed to access.

I am not looking to replace the airbag connectors or any connector. The mechanic said using electrical cleaner on the connectors from wiring harness should spark the connection and then the messages on the dashboards will erase if that's the case. He said that is a much cheaper option than to buy an entire new harness. As they pinpointed the warnings are strictly from the wiring harness since all the computers in the vehicle are in working condition and are new on top of it.

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[joegr]

Thank you for explaining exacting what all have to be removed to access.

I am not looking to replace the airbag connectors or any connector. The mechanic said using electrical cleaner on the connectors from wiring harness should spark the connection and then the messages on the dashboards will erase if that's the case. He said that is a much cheaper option than to buy an entire new harness. As they pinpointed the warnings are strictly from the wiring harness since all the computers in the vehicle are in working condition and are new on top of it.

I feel like that is all speculation. There is no way (without inspecting every connector) to know if just cleaning will work, or if there is/are one or more defective contacts or bad crimps or a damaged wire. For that matter, I don't see any proof that this isn't due to a failing interface part in one of the modules. The fact that the modules themselves all appear to be working most of the time, does not disprove an occasional partial fault.

 

[corneliusw]

I feel like that is all speculation. There is no way (without inspecting every connector) to know if just cleaning will work, or if there is/are one or more defective contacts or bad crimps or a damaged wire. For that matter, I don't see any proof that this isn't due to a failing interface part in one of the modules. The fact that the modules themselves all appear to be working most of the time, does not disprove an occasional partial fault.

It is speculation, however all the modules were replaced therefore making it less likely something inside the modules failed. All the modules work 100% of the time, not most of the time, there's not one feature of the car that is not working. There are error codes present on the vehicle and they were present prior to replacing the modules and remain present after replacing modules. If none of the modules were replaced then I would be on the same page as user arcman, as he had a similar issue. However, in his case I don't believe all modules were replaced and on top of it his issue was the error codes would not show and then depending on the temperature it would show up. So our experiences are a little different.

There's a communication issue with the vehicle, which is what I have been picking up on when I use a reader on the car and it's the same thing the Hyundai dealership picked up on. The lead mechanic advise me of this in private to try to save some money, so I don't think he is intentionally leading me wrong. That also doesn't mean he is right. He just simply said if it were him he would use an electrical cleaner on the harness before trying to replace it due to how expensive the part is. As that cleaner could help create the spark to get the car to properly communicate.

 

[corneliusw]

So I sprayed the floor wiring harness connectors and every connector inside and the trunk of the vehicle since I emptied the entire vehicle out.

The first problem I had with the car was the PSB warning light (passenger seat belt). I replaced every module after that and installed 2 new front seats. Then that made the vehicle flash 4 lights (Check PSB, Check BSD System, Check AEB System, and Check LDWS). So I sprayed every connector inside the vehicle and now it's back to showing Check PSB light only.

SMH. I can't imagine the floor wiring harness has to be replaced but that's the only major part in the car that wasn't switch out.

 

[greekgeek]

sorry to hear this, sounds like a ton of work. I am a little curious though, why replace all the modules and the seats? Seems much more expensive than the harness in sum total.

So I sprayed the floor wiring harness connectors and every connector inside and the trunk of the vehicle since I emptied the entire vehicle out.

The first problem I had with the car was the PSB warning light (passenger seat belt). I replaced every module after that and installed 2 new front seats. Then that made the vehicle flash 4 lights (Check PSB, Check BSD System, Check AEB System, and Check LDWS). So I sprayed every connector inside the vehicle and now it's back to showing Check PSB light only.

SMH. I can't imagine the floor wiring harness has to be replaced but that's the only major part in the car that wasn't switch out.

 

[corneliusw]

sorry to hear this, sounds like a ton of work. I am a little curious though, why replace all the modules and the seats? Seems much more expensive than the harness in sum total.

I had the connection to essentially get those modules for absolutely nothing. But yes, you're right. Starting the wiring harness could've been first. However, with that said I had no idea that I should even look at the wiring harness. 3 different Hyundai dealerships never mentioned it, nor did the independent mechanics. It wasn't until my last attempt a few weeks ago that the head mechanic expressed that we should replace the wiring harness after they performed test on the modules and saw that they were working.

 

[corneliusw]

I am actually thinking my guy didn't reconnect everything properly. As the A/C is not blowing cold air anymore. The trunk lid also no longer opens when I press the button inside the car or use my car keys. The lock button on key also does not work any longer, I can only unlock it. The locking/unlocking buttons work fine inside the vehicle.

Strange stuff!

 

[greekgeek]

Very strange indeed. Well good look getting it firgured out, please let us know your progress. For what it's worth my trunk button was not working, was replaced, then weeks later did not work again. Pretty sure that and the window switch were why I brought it back before the harness was replaced.

 

[greekgeek]

You might consider to check the section of wiring as described in this thread.

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