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The BMW Z3 Roadster and Coupe Adapter Wiring Harness Circuit Diagram is part of a section in this BMW parts and accessories installation instruction. The wiring harness circuit diagram consists of black 17-pin plug casing, black 16-pin socket casing (chambers A + B), and the cable end. The color abbreviation for the wires available as well. Below is the Adapter Wiring Harness Circuit Diagram and its legend (source : http://www.waycoolinc.com/z3/01/081501/E36Z3.pdf)  :

Legend 

A1* : Black 17-pin plug casing

A2* : Black 16-pin socket casing (chambers A+B)

A3* : Cable end

The components marked with an asterisks (*) are only valid for this circuit diagram. All other components and X designations comply with the BMW after-sales circuit diagrams.

Colour Abbreviations :

BR = Brown

RD = Red

VI = Violet

WT = White

GR = Grey

BK = Black

GN = Green

YE = Yellow

BL = Blue

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