'93 RRC electrical wiring diagram??

Hello all! don't know if anyone can help but i've got a '93 rrc lse with a battery light problem. It comes on slightly with the dipped beam and if you flick it onto full beam, reversing lights and the brake lights. If one or a combination of these are on then the indicators will make it brighten in time with the flashes. However flashing someone, fog lights, heated front or rear windows, heater blower, air con, heated seats, ecas compressor or anything else won't bring the light on at all even if I put them all on together! I've replaced all the fuseable links at the battery all to no avail. my haynes manual only covers up to '92 and the rave cd i've got only does the '95 model and my wiring seems different to both of them. Can anyone help??!! Thanks, Jo.