EB falcon with Mitsubishi Alt won't charge

[donnieboy747]

Recently alt belt broke,  have replaced with new one.  Won't charge battery,  have tried 2 different batteries and installed two other alts but still won't charge also battery light stays on.  Have swapped around relays on both banks on both sides of engine. Only relay I haven't touched yet under radiator spill reservoir.  May that relay be damaged in order to not be able to regulate the charge for battery?