Tachometer / RPM Signal Wire
#1
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St. Jude Donor '14-'15
Tachometer / RPM Signal Wire
I'm looking over all of the wiring schematics at the moment (and have been for a good part of the evening), and can't find an acceptable tachometer sensor wire in the driver knee cluster.
Usually, we'd just pull from the OBD2 pins 4/5 and 16 plus an RPM signal from pin 9.
No such luck here. Anyone else been staring at a schematic that has more info than myself? I just don't see anything yet.
As for practical application, this is for installing a dedicated shift light that is programmed via USB for sending shift points and alerting accordingly.
Thanks in advance.
Usually, we'd just pull from the OBD2 pins 4/5 and 16 plus an RPM signal from pin 9.
No such luck here. Anyone else been staring at a schematic that has more info than myself? I just don't see anything yet.
As for practical application, this is for installing a dedicated shift light that is programmed via USB for sending shift points and alerting accordingly.
Thanks in advance.
#4
Safety Car
Bad news. The ECM, BCM, and cluster all use serial communication for engine speed. I'll keep digging around, but I see nothing in anything I have pertaining to a RPM output. Surely one exists, but is definitely not used for these. Seeing as how historically, GM releases crate motors using one-off operating systems in the same hardware as production vehicles, an output is probably somewhere. You may have to resort to a driver box though.
Last edited by DSteck; 02-14-2014 at 03:10 PM.
#10
Drifting