[GMCNUT]

Guys, thank you for the advice - I went back to work on the truck and I noticed that one of the snipped off heavy guage wires was in a sizeable taped up bundle on the regulator wiring, so when I undid that tape, it revealed the factory ring terminal on the large Red wire coming from the voltage regulator - the dealer had simply bolted another ring terminal to this one and taped it up - so when I cut the wires, I did cut any power from the regulator to the starter. So best part is, no factory wiring was butchered which was my worry - I simply removed the Ammeters ring terminal and reattached the factory one and presto - instantly working again. Thank you for the advice - you guys were dead on!