CCRM or PCM?

[Lonely SHO]

Hello all, I've got an '89 SHO and the radiator fan has been staying on after the key has been switched to off and draining the battery. I'm not sure it this is because I have a bad PCM temp sensor or a relay in the CCRM stuck on. I would like to avoid buying a PCM and CCRM, and if possible could someone send me the pinout for the CCRM and the PCM as I have been unable to find either. Thanks for anything.

 

[SHOrod]

Below is the diagram for the Integrated Relay Control Module (IRCM) for the 1989 SHO. Note that the EDF Relay is the relay for the cooling fan. It appears to be triggered by PCM Pin 55 at IRCM terminal 14 via an NPN transistor. So that could be a 5VDC signal from the PCM to trigger the relay.

-Rod

 

[BaySHO Performance]

Stuck relay in the CCRM (was called IRCM in 89). It can often be fixed by giving the CCRM a good whack.

 

[thegreatbriguy]

Hello all, I've got an '89 SHO and the radiator fan has been staying on after the key has been switched to off and draining the battery. I'm not sure it this is because I have a bad PCM temp sensor or a relay in the CCRM stuck on. I would like to avoid buying a PCM and CCRM, and if possible could someone send me the pinout for the CCRM and the PCM as I have been unable to find either. Thanks for anything.

Nicks right, wack it and see if it unsticks. If you need one message me I have M codes. I'm notascam.

 

[Lonely SHO]

Thank you all for the suggestions, I'll give it a few whacks and see if it unsticks.

 

[Devin]

Nicks right, wack it and see if it unsticks. If you need one message me I have M codes. I'm notascam.

Just don't whack it in the tool shed.

 

[Lonely SHO]

I gave the IRCM a whack, and the relay unstuck; now it operates nominally at temperature and turns off when it's supposed to. Thanks again.

 

[luigisho]

You probably should have a spare if you are considering keeping it for a while