[msrdad]

Was plug n play. Ac doesn’t work Through the switch on dash. Ecm isn’t communicating with the compressor. Any ideas where to look

 

[Gen210]

Who made the harness?

 

[bk2life]

can you command the compressor on and off through the computer?

 

[msrdad]

Who made the harness?

Current performance made wiring harness and all the AC stuff

 

[msrdad]

can you command the compressor on and off through the computer?

I don’t think so

 

[oldeerslayer]

What computer are you running?
See this;

Gen3 Air Conditioning

going over all info for utilizing the pcm to control a/c on a swap

lt1swap.com

The 4th drawing at the bottom is how you would wire an S10 with manual A/C. Same as 03 van.

 

[Gen210]

Current performance made wiring harness and all the AC stuff

Contact CPW my friend