Trying to help a friend diagnose and fix his 2005 g35x. We've narrowed it down to the IPDM we think. It continues to click after trying to start the car and seems like it eventually kills the battery. We can't seem to determine if a specific relay is clicking. I've searched and found that the IPDMs tend to get soaked and crap out and his definitely had some moisture. But it wasn't water logged.

Trying to determine if we should replace relays or the whole IPDM. Not sure how to test either one.

 

I guess I should say that I'm not sure if the IPDM is causing the relays to pop.