Originally Posted by tbird100636
Could you be more specific, he added relay or did he replace the CCRM (Constant Control Relay Module) under the warning label shield??? The PCM uses the CCRM to control the radiator fan, the A/C clutch, the fuel pump and power to the PCM.
Hi tbird, he put the relay in a way it bypasses the CCRM and activates the radiator fan. the relay's coil has a permanent grund and the activation comes from the compressor's clutch, the relay's common pole is connected to the wire that comes out of the CCRM and goes to the fan while the other pole of the relay has constant +12v .
i thought the CCRM or maybe the PCM had to know somehow that i turn on the a/c and then through the CCRM activate the fan as needed.
maybe the CCRM is either not getting the a/c on signal or its defective which makes the relay bypass a good idea.
if i disable the relay, the a/c will not cool although the compressor works.
thanks and merry xmas !!