[Del]

If it won't crank when hot but will when cold, sounds just like the problem I had with a GTV6. Turns out the firewall ground wire was dirty and loose. Had aux power for radio, etc, but no crank when hot. Once cleaned and tightened, it was never a problem. I would start at the battery, charge it since it also could be a low battery, clean the connections and retighten, then clean and tighten all the grounds in the engine bay you can find. also, check the connectors for the starter power cable.

 

[Del]

I stay away from the alarms on my 164's. Not worth the potential trouble it looks like. If I could remove them easily without screwing something up, I would.