i have a 1987 325e with a built 2.7 stroker and an I cluster was installed in my car.i have no working tach or econometer. ok so im trying to figure out this tach situation and ive found that i need to run a wire from pin #9 tach/signal to the black wire on my c104 connector in the glovebox.. BUT on my c101 pin#9 is empty. no wires are in the connector for pin 9. now on the 88 pinout there is the black tach wire that i need to splice my c104 into. http://ebookbrowse.com/early-late-e3...xls-d135243946 note here that 87 #9 is empy and 88 has the black tach wire, but no where in the 87 connector does it state tach signal at all, so what am i supposed to use to give that pulse signal? ive done my research and drawn a blank, so now i need your help.. please R3v help me out :crazy:
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You can find electrical diagrams for your model year at either of these links:
http://shark.armchair.mb.ca/~dave/BMW/e30/
Instrument Cluster is section 6210.
E30_87.pdf
Engine speed input comes from the Motronic Control Unit,
325e: Pin-1 Black wire
325i: Pin-6 Black/Blue wire
From there to Pin-1 on C104 Black wire, both 325e and 325i,
then Pin-1 on C235 Black wire,
then Pin-21 on C103 Black wire,
finally to Pin-7 on C1 (Blue 26-pin connector on Cluster) Black wire.
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