So awhile back, I replaced my interior electrical harness with one out of a 13 GT/CS. I also replaced my underdash wiring harness with one out of a premium. I even went as far as replacing my instrument cluster with one that has track apps that has my vin flashed.

After lots of searching on this fourm I was able to get my car1) running (IDS/PCM fun...)2) audio to work (had to buy a premium ACM and install the amp in the driver side foot well)

But I have always had the air bag light on. Is it because I have manual cloth seats and the GT/CS wiring harness has a wiring harness for powered seats? If I buy a premium dash will I be able to get heated seats? Do I have to do more programming to get heated seats?

 

Get thee a proper scan tool that can ask the car why it's unhappy, and you'll have your answer better than anyone here can give.

However, as a *guess*... if the harness/computer is wired/programmed to expect something you don't have plugged in, then yes, the car/computers are going to be upset and you need to get them plugged in... or deleted from the computer.

And we're back to a proper scan tool, except this time it's one that can reprogram things. Which may or may not be the same as the above indicated scan tool, but hey, don't quote me on that.

/Forscan. Check it out. Maybe it's what you need...

 

Oh my those pictures!!!!