E30 Zone

Posted: **Wed Apr 20, 2011 4:06 pm**

A little bit of a strange setup, but bear with me.

I have an E21 with full E30 motronic wiring from a series 1 325i. The instrument cluster is from an 87 325i and its Rev Counter stopped working one day (although it did start working again intermittently for a while) and then I had the wiring swapped over for the later 1.3 motronic.

Question is what do I need to get it working, keeping in mind the wiring is now 1.3?

Any help would be really appreciated ”“ thanks

Posted: **Thu Apr 21, 2011 11:19 am**

Anyone please?

Posted: **Thu Apr 21, 2011 5:52 pm**

Your motronic 1.3 loom will try to sent the engine speed wire (black) thorugh the circular C101. Your E21 may not take the engine speed signal through the main centre harness (which leads to the C101 in the engine bay). The engine speed signal in a E21 may come through another route. It does in a E28 may the E21's are similar.

Posted: **Thu Apr 21, 2011 7:06 pm**

Okey Kokey, still not quite sure but this gives me something to go on - thanks!

Posted: **Thu Apr 21, 2011 7:10 pm**

This might help:

http://www.e30zone.net/modules.php?name ... c&t=181277

Posted: **Fri Apr 22, 2011 1:31 am**

Hi Willnz, yes the full motronic loom, econometer used to work. If this was the case, any leads from there?

E30 Zone

Rev Counter not working on 'E30' 325i Motronic 1.3

Rev Counter not working on 'E30' 325i Motronic 1.3

Re: Rev Counter not working on 'E30' 325i Motronic 1.3

Re: Rev Counter not working on 'E30' 325i Motronic 1.3

Re: Rev Counter not working on 'E30' 325i Motronic 1.3

Re: Rev Counter not working on 'E30' 325i Motronic 1.3

Re: Rev Counter not working on 'E30' 325i Motronic 1.3