While replacing the alternator on my 2002 gs300, the wires Sep 25, 2012while replacing the alternator on my 2002 gs300, the wires came out of the wire connector to the alternator and I need to fix this. Can I get a picture or diagram of the wiring harness so I can repair the connector? 98 lexus: gs.wire connectorne swap original alternator.4/5 2002 Lexus GS300 Alternator | Advance Auto Parts Compare 2002 Lexus GS300 Alternator brands. Check prices & reviews on aftermarket & stock parts for your 2002 GS300 Alternator. Order your parts online or pick them up in-store at your local Advance Auto Parts.