AC Issues

I tried using the search function to answer this question and could not find anything so please bear with me. I have a 2013 Tacoma Pre Runner with the 4.0 engine. About 8 months ago my A/C would only work on high, so I replaced the blower motor resistor and it worked! Started to have the same issue so I went to replace the part again.

My new resistor came with a new plug. So I replaced the resistor and the plug, along with adding about 3 inches of wiring with the new plug. The wiring is connected and I know I have a solid connection. When I drove to work A/C or heat did not work at all, even on high. On the way home A/C worked as it should on all settings!!! Now it's not working again . Any Ideas???

 

I’m just guessing but since it’s intermittent possibly a short or loose connection. But finding it will be a challenge if is is that.