The pulse module is not unique to the Crossfire - it's so generic, that Base, Limited and SRT all have the same part. There are two relays: Starter and I/C pump; of course, the I/C pump relay is not used in non-SRTs, but the relay IS there.

I doubt the pulse module is your problem. Turn key to "on", if the fan warps up, then the Engine Control Relay output from the RCM is bad, period.