[turnerd]

PCM is under the radio/CD changer and you pull the shifter console piece for access FWIW. I'd start by checking all your grounds, specifically the two going to the battery. Just take them off an clean them up really good, the same for the battery. Also, pull the alternator and see what's wrong with it, they aren't bad to diagnose on a bench.

 

[turnerd]

Oh the '01 is drive by wire, so the PCM is where the cruise control should be, meaning the passenger side of the engine bay by the firewall-- you are right