rev counter

[e30cossie]

I need to wire up my rev counter .can anyone tell me what colour wire joins to the back of the clocks or is there a easier place to join the wire.
any info will be a great help.

[tomtomiS]

in what way do u mean wire it up, there's a couple of multiplugs that go into the back of the clocks

[e30cossie]

I have a cosworth engine loom and the green wire is for the rev counter so there must be a wire from the dash clock rev counter and was wondering what colour this is.thanks

[Andy335Touring]

Solid Black wire on one of the two plugs i think

[tomtomiS]

if im right then the the plug u need is the one behind the rev counter, found out the other day that the plug on right ( blue??) does the electrics and bulbs for right hand side and the one on the left (white plug??) does the left. pardon me if im havin a blonde moment!!

[eko]

Can it not be wired into the C101 plug under the bonnet?
Ian332i or Brianmoore will be able to tell you for sure

[Brianmoooore]

BMW ECUs have an output to drive the rev counter. On an E30 it's a black wire which goes through pin 9 (IIRC), of the C101 connector.
No idea if the Ford signal is compatible, but there are others with cosworth engined E30s on the forum who should be able to tell you.