Source google image: https://sites.google.com/site/bmwr1007t/_/rsrc/1472858749518/wiring-diagram/Wiring%20Diagram.JPG
Schema electrique bmw z3
Source google image: https://sites.google.com/site/bmwr1007t/_/rsrc/1472858749518/wiring-diagram/Wiring%20Diagram.JPG