Anti theft system light not working

Hey everyone, I just changed out my evaporator core and put everything back together. Everything works perfectly fine other than the anti theft system (car with key light) doesn't turn on or blink at all, which means I can't fully start my truck. Was wondering if that light should come on or do anything if its not working right. Checked all fuses, connectors and nothing looks unplugged or bad. Just can't figure out why that light won't come on anymore. I've tried everything I could find to reset it and nothings working. Thanks for the help if you see this

 

Welcome to TW...@Dm93

 

I'd suspect you forgot to plug in the Transponder Key ECU, it's buried deep in the dash.

First thing I would do though is get a scan tool that can do all systems and see what is and isn't online and what codes I have.

 

Appreciate the advise and pics! Buying a scanner today and probably gonna take apart what I need to see the connection.

 

You will need one that can do all systems to be able to talk to the Transponder Key ECU, a generic OBDII code reader is only gona pull codes from the ECM.

https://www.tacomaworld.com/threads/scan-tool-discussion-recommendations.834898/

 

Wow the problem was, I didnt plug in the Transponder connector. Connected it and works fine.