1994 xj6 circuit failure but all fuses are ok?

Ok on jx6 jaguar power frome battery to igniton switch /next to central micro processer /next gear swith no tranmission /next to starter relay /next to starter motor /in haynes book its on page12-17 find book at autozone auto parts it's was 25 buck it help alittle for me. Frist test battery cable and ground

ground wood be frist. Remove nuts and clean it found it to fix lots of then on my car hope it help you tony