Hello I will help you with your question,
Was the airbag light on before you changed out the temp gauge?
Is the cluster the only work you did from the time the light was not on to the time the light was on?
Did you disconnect the battery before you pulled the cluster?
It could be but if you are sure that there is no wiring pinched pull fuse #10 from the under dash fuse block and see if the light goes out. If it does there is a code stored in the airbag computer so you would need a Hyundai scanttol to read the code and then what the code was flagged for diagnosed and repaired.
Does the horn work?
OK if the hoirn works then it is not likely the clockspring connector at the base of the steering wheel. This connector also keeps the airbag powered when you turn the wheel.
If the light comes back on after you remove and repalce the fuse then there is a code stored that has to be investigated with a Hyundai scantool. If the light does not go out with the fuse removed and the key on there is a fault in the cluster and the light circuit is getting power from somewhere else.
Let me know what I can do to help
No the only way to clear codes is to read the code, repair the problem the clear the code with a scantool. As the airbag system is specific to Hyundai a HiScan pro, HDS system, Carman scan-lite scantool is needed to communicate with the airbag module.
The low volume of these vehicles means that most shops will not have one of these scantools as they are 3 - 6K each. Any dealer will be able to pull the code and let you know what component has failed or where the wiring fault is.
If everyting is OK the airbag system does a system check every time you turn the key on. It blinks the light six times and that is an "all is good" signal then turns the light out.
If the light is on and there is not a wiring fault there is a fault that needs to be repaired in the airbag system
OK I will be here until 10 ET tonight
No you cannot reset the airbag computer without reading and clearing the codes. It will set the code and turn the light on as soon as you turn the key to the run position. The computer runs a self check of the system everytime you start the car and if there is a fault it turns the light on and sets a code. You have to repair the fault to turn the light out.
If you pulled #10 fuse and the light stays on there is a fault in the cluster. The light gets its power from the fuse and the ground from the airbag computer so there has to be power supplied from another source.
Why did you take the cluster apart?
I just checked another source for wiring diagrams and try fuse #1 to turn the light off.
I changed the post above to have you check fuse #1 so I wanted to be sure you saw that.
Ok i will watch for your post on that
That is normal and shows that the light is not being fed from any other source so you are back to the airbag module having a code stored and is turning the light on.
Did you replace the entire cluster or the temp gauge?
Ok then you can check pin #9 (brown/black wire) at the airbag computer under the console for ground when you turn the key to run. If ground is being provided by the computer there is a code stored and you will have to have the code read and the repair made to have the light turn out after the airbag computer goes through its self check
Click here for connector
If he read the codes in the airbag moduel he likely cleared them at teh same time to see what reset so once the low voltage code was cleared and the self test ran the code would not reset because there was no more low voltage.
Next time remove the negative cable of the battery and wait two minutes before unplugging anything else