pw95 0 Report post Posted October 22, 2013 Hello, my rev counter on my E30 isn't working, ive put another rev counter in but still isn't working any suggestions would be highly appreciated Quote Share this post Link to post Share on other sites
hybrid 1043 Report post Posted October 22, 2013 I can remember which pin number but check the tachometer signal in the C101 plug in the engine bay (big round plug that isnt the diag plug). (some one else here will know off hand)You can use a voltmeter to check for initial voltage or it you want to check the square wave signal use an oscilloscope. Next thing to look at is the instrument cluster. It will possible be the cogs in the tach, batteries or leaked batteries in the warning light board or the main board may have a lifted track. All fairly easy to sort out. and lots of info on the net about it. The number of times I have refurbished mine is silly. Right now I have a problem where the rev gauge shaft spins inside the needle causing it to read low after giving it some on the track. I'm looking for an e30 M3 tachometer which goes up to 8000rpm Quote Share this post Link to post Share on other sites
bmw335i 16 Report post Posted October 23, 2013 with my m30 conversion my tach wasnt working, ive run a wire from the ecu to the blue wire in the cluster loom. works fine. this could help you. Quote Share this post Link to post Share on other sites
pw95 0 Report post Posted October 23, 2013 sh*t thanks alot guys ill try it all this weekend then ill let yall know Quote Share this post Link to post Share on other sites
pw95 0 Report post Posted October 28, 2013 Hey bro can u put up a photo of where on the ecu u connected the wire to which blue wire in the cluster loom ?? cheers Quote Share this post Link to post Share on other sites
