Help! No start after driving

I have a 2000 Vanden Plas. The car starts and runs in the morning or when I let it sit for some time but after driving and letting it sit for longer than a couple hours it will not start. I mean, nothing. NO click. Only the dash lights on. I know it isn’t the starter because when this happened I jump the starter relay and it turned over. Someone suggested that it could be the BCM, PCM or SLM. I don’t think it’s the SLM because I took it off and the same thing continued to occur.

Anyone ever experience this? Any suggestions?

Check the power ‘stud’ on the false bulkhead in the engine compartment.
A loose/burnt stud means no cranking at times. (power to the starter/alternator wire)

Check the MEGA FUSE in the boot near the battery.

TSB for hard/no start.

303-52 Difficult Or Non-Start.pdf (93.1 KB)

bob