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Discussion Starter #1
hi all,

can anyone tell me where is negative lead on m54 6 cyl engine?
i found 8 leads coming from DME to ignition coils (one FAT red, thick BROWN and 6 BLACK multi coloured)

there are coulpe of pics. which one is which?

thank you
 

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The Red & Brown is split into 6 Red & 6 Brown cables after they exit the DME; the "black & colour stripe" wires run to each coil individually to pulse the ignition signal to each coil.

Coil 1
Red wire - main power
Black & White - pulse from ECU
Brown - earth

Coil 2
Red wire - main power
Black & Red - pulse from ECU
Brown - earth

Coil 3
Red wire - main power
Black & Yellow - pulse from ECU
Brown - earth

Coil 4
Red wire - main power
Black & Blue - pulse from ECU
Brown - earth

Coil 5
Red wire - main power
Black & Green - pulse from ECU
Brown - earth

Coil 6
Red wire - main power
Black & Purple - pulse from ECU
Brown - earth

HTH
 
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