are you flashing any codes on the display like a 46?
couple things to check, assuming there are no issues with the wiring or the battery:
voltage output to battery. you should be seeing at least 14v with the engine running at 5000 rpm. go ahead and remove the belt for this test.
check your fuse and its connections as well as the battery connections and the grounds.
check the stator resistance. seems like 20-26 ohms, dont have that info at hand tonight.
all else being good would lead you to the regulator or its ground. dont recall a simple regulator test without special equipment, seems like a go/no go item. from there, check for any bad or shorting wires.
there were some wiring updates to the phazer models, i would assume the venture may fall under these. check with your dealer, it wasnt really let out, but there is a tech bulletin for the main ground harness heating up and losing contact.