QuestionI am looking for a wiring harness diagram on the MGB GT 1973 Model
AnswerHi Nick. Wiring diagrams are included in the MGB owner's handbook, the MGB workshop manual, and the Haynes MGB manual. These are all available from Moss Europe, Brown & Gammons, the MG Owners Club, or you will find them on eBay ...
If you need to trace any particular circuit, I could tell you what colours the wires are.