What is ircm ccrm in 1993 Ford Tempo?

IRCM= Integrated Relay Control Module

CCRM= Constant Control Relay Module

They are basically the same thing. The module consists of 4 relays that work in conjunction with the PCM to make things work.

1. Relay for the PCM

2. Relay for the high and low radiator fan speeds

3. Relay for the fuel pump

4. Rely for the Air Conditioning clutch on the compressor