Electrical problem
1997 Mercury Tracer 4 cyl Two Wheel Drive Automatic 180000 miles

I bought a CCRM about 3 months ago to fix a problem with the A/C.
The A/C is working fine but as far as I know, when I turn on the switch, the fuel pump is supposed to run for about two seconds and then stop. Currently it stays on continously.
I got a used CCRM from the junkyard and replaced it. (I learned later that I had to disconnect the battery oops!).
The pump issue got corrected but the A/C stopped working.
I re-replace the newer CCRM and again I have A/C but the pump stays on.
Can these CCRM be fixed?

Thanks