A few of us have noticed that 4AG TPS specs have been asked for a fair bit lately so ChaosAD and myself have agreed this should be posted up.
Yellow = Vcc
Red = VTA
Blue = IDL
Brown = Earth (E2)
Once you've got the 2 middle setting right it should be fine.
Specs borrowed (read: stolen) from HRT
I know these apply to all TVIS 4AG's please add if theres more they suit